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#1
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Are my NHT 2.5i's sick?
I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old
Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#2
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Are my NHT 2.5i's sick?
Sounds like the amp has a problem, probably not the speakers, though they
and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#3
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Are my NHT 2.5i's sick?
Sounds like the amp has a problem, probably not the speakers, though they
and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#4
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Are my NHT 2.5i's sick?
Sounds like the amp has a problem, probably not the speakers, though they
and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#5
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Are my NHT 2.5i's sick?
Sounds like the amp has a problem, probably not the speakers, though they
and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#6
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#7
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#8
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#9
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#10
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Are my NHT 2.5i's sick?
Thanks for input Arny. I ran this by one of the senior engineering guys at
work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#11
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Are my NHT 2.5i's sick?
Thanks for input Arny. I ran this by one of the senior engineering guys at
work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#12
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Are my NHT 2.5i's sick?
Thanks for input Arny. I ran this by one of the senior engineering guys at
work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#13
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Are my NHT 2.5i's sick?
Thanks for input Arny. I ran this by one of the senior engineering guys at
work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#14
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Are my NHT 2.5i's sick?
thanks...i have a feeling I need a new amp. My trusty Carvers have kicked
the bucket! "Mark D. Zacharias" wrote in message ... Sounds like the amp has a problem, probably not the speakers, though they and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#15
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Are my NHT 2.5i's sick?
thanks...i have a feeling I need a new amp. My trusty Carvers have kicked
the bucket! "Mark D. Zacharias" wrote in message ... Sounds like the amp has a problem, probably not the speakers, though they and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#16
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Are my NHT 2.5i's sick?
thanks...i have a feeling I need a new amp. My trusty Carvers have kicked
the bucket! "Mark D. Zacharias" wrote in message ... Sounds like the amp has a problem, probably not the speakers, though they and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#17
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Are my NHT 2.5i's sick?
thanks...i have a feeling I need a new amp. My trusty Carvers have kicked
the bucket! "Mark D. Zacharias" wrote in message ... Sounds like the amp has a problem, probably not the speakers, though they and the wires should probably be checked and corrected as necessary. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Oceans 2K" wrote in message m... I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Anybody have any ideas? Why are hi-freq inputs at OL? (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) TIA for any help ! |
#18
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
om Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. What does that really mean? Is it an indictment of your power grid or your house wiring? He thinks power amps really take brunt of these sags and surges. Power amps are more likely to be marginally designed in the area of power supplies because upgrades are most costly. That all said, Carver does not have an enviable record for making reliable, long-lasting power amps. It's been a very long time since I've seen a power amp die for reasons that were power-related. Your particular problem could very well have zero point zero to do with line power quality. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Unless you've got a specific problem, its overkill and a waste of money. You can buy a good power amp for the price of some of this kind of hardware. You can redo some house wiring if that's the problem. A good power amp won't care very much about power. The pro audio stuff typically lives through far worse abuse, especially on the road. Have you heard good/bad on the dedicated double-conv UPS idea? Depends on what your power is really like. Here's an inexpensive tool that might give you some clues: http://www.smarthome.com/9034.html |
#19
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
om Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. What does that really mean? Is it an indictment of your power grid or your house wiring? He thinks power amps really take brunt of these sags and surges. Power amps are more likely to be marginally designed in the area of power supplies because upgrades are most costly. That all said, Carver does not have an enviable record for making reliable, long-lasting power amps. It's been a very long time since I've seen a power amp die for reasons that were power-related. Your particular problem could very well have zero point zero to do with line power quality. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Unless you've got a specific problem, its overkill and a waste of money. You can buy a good power amp for the price of some of this kind of hardware. You can redo some house wiring if that's the problem. A good power amp won't care very much about power. The pro audio stuff typically lives through far worse abuse, especially on the road. Have you heard good/bad on the dedicated double-conv UPS idea? Depends on what your power is really like. Here's an inexpensive tool that might give you some clues: http://www.smarthome.com/9034.html |
#20
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
om Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. What does that really mean? Is it an indictment of your power grid or your house wiring? He thinks power amps really take brunt of these sags and surges. Power amps are more likely to be marginally designed in the area of power supplies because upgrades are most costly. That all said, Carver does not have an enviable record for making reliable, long-lasting power amps. It's been a very long time since I've seen a power amp die for reasons that were power-related. Your particular problem could very well have zero point zero to do with line power quality. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Unless you've got a specific problem, its overkill and a waste of money. You can buy a good power amp for the price of some of this kind of hardware. You can redo some house wiring if that's the problem. A good power amp won't care very much about power. The pro audio stuff typically lives through far worse abuse, especially on the road. Have you heard good/bad on the dedicated double-conv UPS idea? Depends on what your power is really like. Here's an inexpensive tool that might give you some clues: http://www.smarthome.com/9034.html |
#21
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Are my NHT 2.5i's sick?
"Oceans 2K" wrote in message
om Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. What does that really mean? Is it an indictment of your power grid or your house wiring? He thinks power amps really take brunt of these sags and surges. Power amps are more likely to be marginally designed in the area of power supplies because upgrades are most costly. That all said, Carver does not have an enviable record for making reliable, long-lasting power amps. It's been a very long time since I've seen a power amp die for reasons that were power-related. Your particular problem could very well have zero point zero to do with line power quality. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Unless you've got a specific problem, its overkill and a waste of money. You can buy a good power amp for the price of some of this kind of hardware. You can redo some house wiring if that's the problem. A good power amp won't care very much about power. The pro audio stuff typically lives through far worse abuse, especially on the road. Have you heard good/bad on the dedicated double-conv UPS idea? Depends on what your power is really like. Here's an inexpensive tool that might give you some clues: http://www.smarthome.com/9034.html |
#22
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Are my NHT 2.5i's sick?
If your lights are dimming/flickering you need to find out why.... do some
of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#23
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Are my NHT 2.5i's sick?
If your lights are dimming/flickering you need to find out why.... do some
of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#24
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Are my NHT 2.5i's sick?
If your lights are dimming/flickering you need to find out why.... do some
of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#25
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Are my NHT 2.5i's sick?
If your lights are dimming/flickering you need to find out why.... do some
of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#26
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Are my NHT 2.5i's sick?
from what I can tell it is a utility issue. Neighbors laughed when I asked
them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#27
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Are my NHT 2.5i's sick?
from what I can tell it is a utility issue. Neighbors laughed when I asked
them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#28
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Are my NHT 2.5i's sick?
from what I can tell it is a utility issue. Neighbors laughed when I asked
them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#29
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Are my NHT 2.5i's sick?
from what I can tell it is a utility issue. Neighbors laughed when I asked
them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#30
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Are my NHT 2.5i's sick?
A call to the power company engineering department may be helpful, our local
one will supply a line monitor to anyone who complains.... They attempt to improve the situation if things are outside of the regulated standards. If it's just you an the neighbors on the same distribution transformer it could be as simple as a bad connection at the transformer. Low voltage is unlikely to damage electronics.... (motors are an different issue) A loose neutral connection between the distribution transformer and your breaker panel will cause voltage variations both below and above 120.... Rgds: Eric "Oceans 2K" wrote in message om... from what I can tell it is a utility issue. Neighbors laughed when I asked them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#31
|
|||
|
|||
Are my NHT 2.5i's sick?
A call to the power company engineering department may be helpful, our local
one will supply a line monitor to anyone who complains.... They attempt to improve the situation if things are outside of the regulated standards. If it's just you an the neighbors on the same distribution transformer it could be as simple as a bad connection at the transformer. Low voltage is unlikely to damage electronics.... (motors are an different issue) A loose neutral connection between the distribution transformer and your breaker panel will cause voltage variations both below and above 120.... Rgds: Eric "Oceans 2K" wrote in message om... from what I can tell it is a utility issue. Neighbors laughed when I asked them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#32
|
|||
|
|||
Are my NHT 2.5i's sick?
A call to the power company engineering department may be helpful, our local
one will supply a line monitor to anyone who complains.... They attempt to improve the situation if things are outside of the regulated standards. If it's just you an the neighbors on the same distribution transformer it could be as simple as a bad connection at the transformer. Low voltage is unlikely to damage electronics.... (motors are an different issue) A loose neutral connection between the distribution transformer and your breaker panel will cause voltage variations both below and above 120.... Rgds: Eric "Oceans 2K" wrote in message om... from what I can tell it is a utility issue. Neighbors laughed when I asked them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
#33
|
|||
|
|||
Are my NHT 2.5i's sick?
A call to the power company engineering department may be helpful, our local
one will supply a line monitor to anyone who complains.... They attempt to improve the situation if things are outside of the regulated standards. If it's just you an the neighbors on the same distribution transformer it could be as simple as a bad connection at the transformer. Low voltage is unlikely to damage electronics.... (motors are an different issue) A loose neutral connection between the distribution transformer and your breaker panel will cause voltage variations both below and above 120.... Rgds: Eric "Oceans 2K" wrote in message om... from what I can tell it is a utility issue. Neighbors laughed when I asked them about it last summer. I'm in the CITY just outside a heavy industrial area. But.....definitely want to upgrade panel to 200A with as much of a re-wire as I can do myself. Currently have a 30yr-old 100A SqD main brkr with 8 branch ckts. My hi-fi rig is on its own circuit (except 2 lamps in that room). Entire house is ran with 3-wire Romex. No old 2-wire MC which can cause ground issues. 15A receptacle for hi-fi sys is a hosp grade Leviton that I installed when i moved in. Funny part is as soon as I moved in (2 years ago) my 7 yr-old Panamax 1000+ Power monitor/surge suppressor died and I have been running almost "naked" with a $40 Tripplite power strip/suppressor. I think Arny is correct...I just came to end-of-life on some of my mid-fi components. I'm going this weekend to take a listen to some replacements. Just would hate to have this happen again. The UPS thing is still an option. Through a business associate I can get a GE AC-DC-AC UPS at very low cost. thanks for the reply TC "Eric K. Weber" wrote in message ... If your lights are dimming/flickering you need to find out why.... do some of the lights in the house get over bright and burn out frequently? You need to find the source of your power problems..... unless it is over 100 degrees outside the "grid" is not the most likely suspect..... Rgds: Eric "Oceans 2K" wrote in message om... Thanks for input Arny. I ran this by one of the senior engineering guys at work. He asked if my grid power was dirty. I thought about it and sure enough, my lights are occasionally dimming/flickering. He thinks power amps really take brunt of these sags and surges. He said before I go and drop a couple grand on new equipment to look into a double-conversion AC-DC-AC UPS system dedicated to my hi-fi rig (1.5KVA Powerware or GE). Called it a 120V "firewall". Have you heard good/bad on the dedicated double-conv UPS idea? thanks "Arny Krueger" wrote in message ... "Oceans 2K" wrote in message m I have a 7 year old pair of NHT 2.5i's that I drive with my trusty 13 yr old Carver TFM-15. For 7 years these two have given me wonderful music reproduction. Have had numerous digital sources and pre-amps. This morning after about 1 hour of quiet FM radio listening the Carver "shut-down". Lights and all. I turned off all components and re-started in sequential order. Within 5 minutes it shut-down again. My wide says she heard a subtle "pop". The pop would be probably due to the amp shutting down. Sounds like you have a sick amp. So I check all connections and main fuse. No probs. No excessive heat or smell. Aside from shut down, music sounded perfect. No audible issues. I disconnect speaker's connections and post-jumper (did not run in bi-amp mode) and get out the FLUKE. Low-freq posts registers 5.5 ohms (spec) both channels. Hi-freq posts (+ -) it registers "OL" (open circuit). Both R and L are same. Sounds about right. There's usually a capacitor in series with the tweeters, and this means that the tweeter terminals will read open circuit. Proof of pudding - is there any treble when you drive the speakers with another amplifier? Is there any trouble? Anybody have any ideas? Why are hi-freq inputs at OL? Because there is a crossover capacitor in series with the tweeter. It acts as a high pass filter, dropping off the bass. (Addl' Background: For 2 years had a 2nd TFM-15cb bi-amping the 2.5i's. It was connected to hi-freq inputs. It began to introduce static and noise. Then it "shut-down" as above. Removed 1 year ago, went back to single amp and all was good...until now.) Sounds like you've discovered the end-of-life behavior of this particular Carver amp. |
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