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#41
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Subwoofer hum: is it my receiver?
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#42
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Subwoofer hum: is it my receiver?
You may just have a ground off inside the unit.When you took it apart there
may have been a ground wire grounded to the case that got removed.Have a look inside. Brian wrote in message om... (Brian) wrote in message . com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wires and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Brian |
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#43
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Subwoofer hum: is it my receiver?
You may just have a ground off inside the unit.When you took it apart there
may have been a ground wire grounded to the case that got removed.Have a look inside. Brian wrote in message om... (Brian) wrote in message . com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wires and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Brian |
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#44
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Subwoofer hum: is it my receiver?
You may just have a ground off inside the unit.When you took it apart there
may have been a ground wire grounded to the case that got removed.Have a look inside. Brian wrote in message om... (Brian) wrote in message . com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wires and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Brian |
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#45
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Subwoofer hum: is it my receiver?
You may just have a ground off inside the unit.When you took it apart there
may have been a ground wire grounded to the case that got removed.Have a look inside. Brian wrote in message om... (Brian) wrote in message . com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wires and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Brian |
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#46
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Subwoofer hum: is it my receiver?
if at all possible, try the receiver on a friends sub, and/or your sub on a
friends receiver. take your stuff to their house where you know there isnt hum and use the same exact connections. randy |
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#47
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Subwoofer hum: is it my receiver?
if at all possible, try the receiver on a friends sub, and/or your sub on a
friends receiver. take your stuff to their house where you know there isnt hum and use the same exact connections. randy |
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#48
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Subwoofer hum: is it my receiver?
if at all possible, try the receiver on a friends sub, and/or your sub on a
friends receiver. take your stuff to their house where you know there isnt hum and use the same exact connections. randy |
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#49
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Subwoofer hum: is it my receiver?
if at all possible, try the receiver on a friends sub, and/or your sub on a
friends receiver. take your stuff to their house where you know there isnt hum and use the same exact connections. randy |
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#51
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Subwoofer hum: is it my receiver?
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#52
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Subwoofer hum: is it my receiver?
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#53
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Subwoofer hum: is it my receiver?
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#55
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Subwoofer hum: is it my receiver?
In , on 02/19/04
at 12:48 PM, (Brian) said: (Brian) wrote in message .com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wire and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) "Ground" is a relative thing, usually implying "zero" potential, but "zero" is not an absolute. Think of a chair. You can measure the height of a chair by sitting it on the ground and measuring the distance between the ground and the top of the chair seat. Now move the chair to the 10th floor of a building. What is the chair height now? How would you measure it? Generally, we would measure chair height from the surface the chair sits on and everything works out. However if the surface is not level or not flat, there could be some unwanted chair movement. Because I want to use the concept below, consider what could happen to our chair if our perfectly flat floor is distorted by a nearby heavy appliance. The electrical "ground" in your home is usually a metal rod driven into the earth near the electrical panel. Each piece of your audio equipment keeps an eye on that ground so that it knows what "zero" means in the context of your home. (Your next door neighbor could have a slightly different ground.) When you connect units together in your stereo, each unit assumes that it and all the other units reference the same ground. If the ground in your home is stressed by a large appliance, the units in your stereo might see different grounds. This will cause unexpected current to flow in the ground and trouble is likely. Consider what could happen if your receiver is sending out zero (the output voltage of the receiver is the same as the receiver's ground). If the subwoofer's ground is the same as the receiver's, the the subwoofer agrees that the input is zero and there should be no sound. If the subwoofer's ground is different from the receiver's ground by 0.05, then the subwoofer will think the receiver is sending 0.05 when the receiver thinks it is sending 0.00. The subwoofer will amplify that 0.05 and you'll hear whatever trash is circulating in the ground. Note the above discussion is a small tip of the iceberg. Whole books are written about grounding. (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) Use one of those "cheater" adaptors designed for connecting a three prong plug to a two prong outlet and don't connect the green wire to annything. Some high end audio components have a switch designed to accomplish this. (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. Good. This minimizes (but does not eliminate) the possibility of a ground loop. (Poor design can create ground loops inside a unit) (an improperly designed unit may pollute the ground and cause trouble for other units in the system) (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) This is a good start. (Don't stand near the window in your skivvies or we'll be seeing you on the news.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) It is very likely that you broke the outer part of the subwoofer jack on your receiver. If this is so, then you will probably pick-up some noise. I am not surprised that you hear some noise when the receiver is turned off or not plugged in to the power outlet. This is another issue and we can deal with it separately (if necessary) after we solve the more urgent problem of the loud hum. For a test, pick another output jack on your receiver that is not adjacent to your subwoofer jack (adjacent jacks could also have been damaged by the same event). Make sure that the subwoofer is turned off and its level control is turned down when you do this. You can use REC OUT if you like (if you do use REC OUT, turn the selector switch to CD and make sure your CD player is ON and in the STOP mode) If the subwoofer hum is now gone (don't forget to turn the subwoofer ON and turn up its level control), then you have a damaged subwoofer output jack. Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Or allergies and someone will claim it's a government plot. ----------------------------------------------------------- spam: wordgame:123(abc):14 9 20 5 2 9 18 4 at 22 15 9 3 5 14 5 20 dot 3 15 13 (Barry Mann) [sorry about the puzzle, spammers are ruining my mailbox] ----------------------------------------------------------- |
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#56
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Subwoofer hum: is it my receiver?
In , on 02/19/04
at 12:48 PM, (Brian) said: (Brian) wrote in message .com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wire and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) "Ground" is a relative thing, usually implying "zero" potential, but "zero" is not an absolute. Think of a chair. You can measure the height of a chair by sitting it on the ground and measuring the distance between the ground and the top of the chair seat. Now move the chair to the 10th floor of a building. What is the chair height now? How would you measure it? Generally, we would measure chair height from the surface the chair sits on and everything works out. However if the surface is not level or not flat, there could be some unwanted chair movement. Because I want to use the concept below, consider what could happen to our chair if our perfectly flat floor is distorted by a nearby heavy appliance. The electrical "ground" in your home is usually a metal rod driven into the earth near the electrical panel. Each piece of your audio equipment keeps an eye on that ground so that it knows what "zero" means in the context of your home. (Your next door neighbor could have a slightly different ground.) When you connect units together in your stereo, each unit assumes that it and all the other units reference the same ground. If the ground in your home is stressed by a large appliance, the units in your stereo might see different grounds. This will cause unexpected current to flow in the ground and trouble is likely. Consider what could happen if your receiver is sending out zero (the output voltage of the receiver is the same as the receiver's ground). If the subwoofer's ground is the same as the receiver's, the the subwoofer agrees that the input is zero and there should be no sound. If the subwoofer's ground is different from the receiver's ground by 0.05, then the subwoofer will think the receiver is sending 0.05 when the receiver thinks it is sending 0.00. The subwoofer will amplify that 0.05 and you'll hear whatever trash is circulating in the ground. Note the above discussion is a small tip of the iceberg. Whole books are written about grounding. (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) Use one of those "cheater" adaptors designed for connecting a three prong plug to a two prong outlet and don't connect the green wire to annything. Some high end audio components have a switch designed to accomplish this. (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. Good. This minimizes (but does not eliminate) the possibility of a ground loop. (Poor design can create ground loops inside a unit) (an improperly designed unit may pollute the ground and cause trouble for other units in the system) (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) This is a good start. (Don't stand near the window in your skivvies or we'll be seeing you on the news.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) It is very likely that you broke the outer part of the subwoofer jack on your receiver. If this is so, then you will probably pick-up some noise. I am not surprised that you hear some noise when the receiver is turned off or not plugged in to the power outlet. This is another issue and we can deal with it separately (if necessary) after we solve the more urgent problem of the loud hum. For a test, pick another output jack on your receiver that is not adjacent to your subwoofer jack (adjacent jacks could also have been damaged by the same event). Make sure that the subwoofer is turned off and its level control is turned down when you do this. You can use REC OUT if you like (if you do use REC OUT, turn the selector switch to CD and make sure your CD player is ON and in the STOP mode) If the subwoofer hum is now gone (don't forget to turn the subwoofer ON and turn up its level control), then you have a damaged subwoofer output jack. Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Or allergies and someone will claim it's a government plot. ----------------------------------------------------------- spam: wordgame:123(abc):14 9 20 5 2 9 18 4 at 22 15 9 3 5 14 5 20 dot 3 15 13 (Barry Mann) [sorry about the puzzle, spammers are ruining my mailbox] ----------------------------------------------------------- |
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#57
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Subwoofer hum: is it my receiver?
In , on 02/19/04
at 12:48 PM, (Brian) said: (Brian) wrote in message .com... Thanks to the group for all the excellent advice. I am clearly trolling in the right waters. This is an update on my progress: I disconnected ALL leads from the receiver other than the subwoofer cable. I unplugged the receiver's powercord from the AC outlet. I removed the receiver to a new room, away from all other wire and hardware. I place the receiver in the middle of the floor (still not plugged to AC), connected the subwoofer and turned on the subwoofer. Hmmm? Hummm! Touching the receiver's case slightly altered the pitch of the hum. When I plugged the received into the same outlet as the subwoofer, the hum increased in volume, and loudened again when I powered on the receiver. (All: Is it possible that a ground loop is being set up between the receiver's subwoofer output jack and the receiver's case? With a receiver that isn't even plugged into an electrical outlet?) "Ground" is a relative thing, usually implying "zero" potential, but "zero" is not an absolute. Think of a chair. You can measure the height of a chair by sitting it on the ground and measuring the distance between the ground and the top of the chair seat. Now move the chair to the 10th floor of a building. What is the chair height now? How would you measure it? Generally, we would measure chair height from the surface the chair sits on and everything works out. However if the surface is not level or not flat, there could be some unwanted chair movement. Because I want to use the concept below, consider what could happen to our chair if our perfectly flat floor is distorted by a nearby heavy appliance. The electrical "ground" in your home is usually a metal rod driven into the earth near the electrical panel. Each piece of your audio equipment keeps an eye on that ground so that it knows what "zero" means in the context of your home. (Your next door neighbor could have a slightly different ground.) When you connect units together in your stereo, each unit assumes that it and all the other units reference the same ground. If the ground in your home is stressed by a large appliance, the units in your stereo might see different grounds. This will cause unexpected current to flow in the ground and trouble is likely. Consider what could happen if your receiver is sending out zero (the output voltage of the receiver is the same as the receiver's ground). If the subwoofer's ground is the same as the receiver's, the the subwoofer agrees that the input is zero and there should be no sound. If the subwoofer's ground is different from the receiver's ground by 0.05, then the subwoofer will think the receiver is sending 0.05 when the receiver thinks it is sending 0.00. The subwoofer will amplify that 0.05 and you'll hear whatever trash is circulating in the ground. Note the above discussion is a small tip of the iceberg. Whole books are written about grounding. (Robert B: Wish I knew how to lift the ground using an extension cord. You all are too smart for me.) Use one of those "cheater" adaptors designed for connecting a three prong plug to a two prong outlet and don't connect the green wire to annything. Some high end audio components have a switch designed to accomplish this. (Troy: hope its not speaker wire interference, because the speaker wires are 30 feet away.) (Todd, Neil and Arny: I am using same outlet. I've removed about all I can remove from the system, including tv cable in. What I have configured is: electric outlet-to-power-cord-to-subwooder-to-cable-to-receiver to an electric cord either (a)laying on the floor or (b) plugged back into the same outlet as the subwoofer. Good. This minimizes (but does not eliminate) the possibility of a ground loop. (Poor design can create ground loops inside a unit) (an improperly designed unit may pollute the ground and cause trouble for other units in the system) (Randy: I take your meaning about the 3 light tester not being the end-all. Beyond that, you're beyond me. But I stripped down pretty much to my skivvies here.) This is a good start. (Don't stand near the window in your skivvies or we'll be seeing you on the news.) (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. The jack of the receiver didn't separate, but the plug end of the connecting cable came apart. The sheath, pin and some plastic stayed on the receiver jack, while a small metallic clip and some more plastic stayed on the wire. And yes, I am thinking that maybe I did damage the receiver jack. I'm trying the eliminate other potentials before taking my Onkyo into the shop.) It is very likely that you broke the outer part of the subwoofer jack on your receiver. If this is so, then you will probably pick-up some noise. I am not surprised that you hear some noise when the receiver is turned off or not plugged in to the power outlet. This is another issue and we can deal with it separately (if necessary) after we solve the more urgent problem of the loud hum. For a test, pick another output jack on your receiver that is not adjacent to your subwoofer jack (adjacent jacks could also have been damaged by the same event). Make sure that the subwoofer is turned off and its level control is turned down when you do this. You can use REC OUT if you like (if you do use REC OUT, turn the selector switch to CD and make sure your CD player is ON and in the STOP mode) If the subwoofer hum is now gone (don't forget to turn the subwoofer ON and turn up its level control), then you have a damaged subwoofer output jack. Sometimes sniffles and a cough aren't a cold. Sometimes it's an pneumonia. Or allergies and someone will claim it's a government plot. ----------------------------------------------------------- spam: wordgame:123(abc):14 9 20 5 2 9 18 4 at 22 15 9 3 5 14 5 20 dot 3 15 13 (Barry Mann) [sorry about the puzzle, spammers are ruining my mailbox] ----------------------------------------------------------- |
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#58
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Subwoofer hum: is it my receiver?
(Robert B: Wish I knew how to lift the ground
using an extension cord. You all are too smart for me.) Two-conductor extension cords have no ground lug. This suggestion was only for a temporary means of lifting the ground to see if that's the problem. (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. Did you say something about having opened and worked on the inside of the powered sub? I must have missed that but someone else made a comment to that effect. If so, it's beginning to sound as though you've accidentally shorted (or opened) something inside. This might be a good time to trundle on down to your local electronics repair shop. Alarm and Home Automation System FAQ http://www.bass-home.com/faq/masterfaq/faq.htm Regards, Robert ============================= Bass Home Electronics 2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support 941-925-9747 Fax 941-232-0791 Wireless Nextel Private ID - 161*21755*1 http://www.bass-home.com http://www.bassburglaralarms.com ============================= |
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#59
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Subwoofer hum: is it my receiver?
(Robert B: Wish I knew how to lift the ground
using an extension cord. You all are too smart for me.) Two-conductor extension cords have no ground lug. This suggestion was only for a temporary means of lifting the ground to see if that's the problem. (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. Did you say something about having opened and worked on the inside of the powered sub? I must have missed that but someone else made a comment to that effect. If so, it's beginning to sound as though you've accidentally shorted (or opened) something inside. This might be a good time to trundle on down to your local electronics repair shop. Alarm and Home Automation System FAQ http://www.bass-home.com/faq/masterfaq/faq.htm Regards, Robert ============================= Bass Home Electronics 2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support 941-925-9747 Fax 941-232-0791 Wireless Nextel Private ID - 161*21755*1 http://www.bass-home.com http://www.bassburglaralarms.com ============================= |
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#60
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Subwoofer hum: is it my receiver?
(Robert B: Wish I knew how to lift the ground
using an extension cord. You all are too smart for me.) Two-conductor extension cords have no ground lug. This suggestion was only for a temporary means of lifting the ground to see if that's the problem. (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. Did you say something about having opened and worked on the inside of the powered sub? I must have missed that but someone else made a comment to that effect. If so, it's beginning to sound as though you've accidentally shorted (or opened) something inside. This might be a good time to trundle on down to your local electronics repair shop. Alarm and Home Automation System FAQ http://www.bass-home.com/faq/masterfaq/faq.htm Regards, Robert ============================= Bass Home Electronics 2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support 941-925-9747 Fax 941-232-0791 Wireless Nextel Private ID - 161*21755*1 http://www.bass-home.com http://www.bassburglaralarms.com ============================= |
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Subwoofer hum: is it my receiver?
(Robert B: Wish I knew how to lift the ground
using an extension cord. You all are too smart for me.) Two-conductor extension cords have no ground lug. This suggestion was only for a temporary means of lifting the ground to see if that's the problem. (Barry: this is more than a little hum. It overpowers the other 5 speakers, even with the gain on the subwoofer fairly low. Did you say something about having opened and worked on the inside of the powered sub? I must have missed that but someone else made a comment to that effect. If so, it's beginning to sound as though you've accidentally shorted (or opened) something inside. This might be a good time to trundle on down to your local electronics repair shop. Alarm and Home Automation System FAQ http://www.bass-home.com/faq/masterfaq/faq.htm Regards, Robert ============================= Bass Home Electronics 2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support 941-925-9747 Fax 941-232-0791 Wireless Nextel Private ID - 161*21755*1 http://www.bass-home.com http://www.bassburglaralarms.com ============================= |
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