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#1
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Old receiver, new(ish) subwoofer
I have an old (70's) Marantz receiver with A & B 2 channel stereo. I
also have a few-years old Pioneer powered subwoofer that only has a line level input. I'm not sure if I can use this sub with the Marantz. Any suggestions on hooking it up? I would like to set up as 2.1 or 4.1. Thanks! |
#2
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
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#4
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Old receiver, new(ish) subwoofer
In article . com, "joshnat" wrote:
Thanks for the response. This is the Marantz I've got: http://www.classic-audio.com/marantz/2215.html It doesn't seem to have pre-amp outputs. I could sum the B outputs to mono and send them to the sub, but the sub has only a line input. Since the receiver would be sending an amplified signal and the powered sub would be amplifying the already-amplified signal, won't this be a problem? You may be able to use it like that, allthough summing channels is not really necessary for bass below 70 Hz, and you can extend that up a bit. The sell power to line level adaptors in car audio shops, allthough you can make one with a few resistors. greg Jos Mark D. Zacharias wrote: wrote: I have an old (70's) Marantz receiver with A & B 2 channel stereo. I also have a few-years old Pioneer powered subwoofer that only has a line level input. I'm not sure if I can use this sub with the Marantz. Any suggestions on hooking it up? I would like to set up as 2.1 or 4.1. Thanks! Not an ideal situation. Many Marantz models had pre-amp outputs - if the Pioneer has stereo (L, R) inputs you can just use those. You may need to use stereo splitters to get the signal out, them back into the Marantz. If it's a single input on the sub you could just use one channel of the pre-out, but you'll lose some bass content on at least a few albums. Not all are summed, despite what we are told. Or you could use a summing network of resistors to provide a mono output from the Marantz main amp output. 10K resistors would probably be a good place to start. Mark Z. |
#5
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
OK, I'm considering making a summing mono circuit and a line level
output circuit to get from the receiver to the sub. It looks easy and the resistors are cheap. What order should I put them in? Should I have the mono conversion first out of the reciever, then convert to line output? Or should I convert to line first, then sum the signals before they go into the sub? Thanks again! GregS wrote: In article . com, "joshnat" wrote: Thanks for the response. This is the Marantz I've got: http://www.classic-audio.com/marantz/2215.html It doesn't seem to have pre-amp outputs. I could sum the B outputs to mono and send them to the sub, but the sub has only a line input. Since the receiver would be sending an amplified signal and the powered sub would be amplifying the already-amplified signal, won't this be a problem? You may be able to use it like that, allthough summing channels is not really necessary for bass below 70 Hz, and you can extend that up a bit. The sell power to line level adaptors in car audio shops, allthough you can make one with a few resistors. greg Jos Mark D. Zacharias wrote: wrote: I have an old (70's) Marantz receiver with A & B 2 channel stereo. I also have a few-years old Pioneer powered subwoofer that only has a line level input. I'm not sure if I can use this sub with the Marantz. Any suggestions on hooking it up? I would like to set up as 2.1 or 4.1. Thanks! Not an ideal situation. Many Marantz models had pre-amp outputs - if the Pioneer has stereo (L, R) inputs you can just use those. You may need to use stereo splitters to get the signal out, them back into the Marantz. If it's a single input on the sub you could just use one channel of the pre-out, but you'll lose some bass content on at least a few albums. Not all are summed, despite what we are told. Or you could use a summing network of resistors to provide a mono output from the Marantz main amp output. 10K resistors would probably be a good place to start. Mark Z. |
#6
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
joshnat wrote:
OK, I'm considering making a summing mono circuit and a line level output circuit to get from the receiver to the sub. It looks easy and the resistors are cheap. What order should I put them in? Should I have the mono conversion first out of the reciever, then convert to line output? Or should I convert to line first, then sum the signals before they go into the sub? You must reduce the level before summing. The amplifier won't like it's outputs being tied together unless a proper degree of isolation is the first thing in the circuit. jak Thanks again! GregS wrote: In article . com, "joshnat" wrote: Thanks for the response. This is the Marantz I've got: http://www.classic-audio.com/marantz/2215.html It doesn't seem to have pre-amp outputs. I could sum the B outputs to mono and send them to the sub, but the sub has only a line input. Since the receiver would be sending an amplified signal and the powered sub would be amplifying the already-amplified signal, won't this be a problem? You may be able to use it like that, allthough summing channels is not really necessary for bass below 70 Hz, and you can extend that up a bit. The sell power to line level adaptors in car audio shops, allthough you can make one with a few resistors. greg Jos Mark D. Zacharias wrote: wrote: I have an old (70's) Marantz receiver with A & B 2 channel stereo. I also have a few-years old Pioneer powered subwoofer that only has a line level input. I'm not sure if I can use this sub with the Marantz. Any suggestions on hooking it up? I would like to set up as 2.1 or 4.1. Thanks! Not an ideal situation. Many Marantz models had pre-amp outputs - if the Pioneer has stereo (L, R) inputs you can just use those. You may need to use stereo splitters to get the signal out, them back into the Marantz. If it's a single input on the sub you could just use one channel of the pre-out, but you'll lose some bass content on at least a few albums. Not all are summed, despite what we are told. Or you could use a summing network of resistors to provide a mono output from the Marantz main amp output. 10K resistors would probably be a good place to start. Mark Z. |
#7
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
In article . com, "joshnat" wrote:
OK, I'm considering making a summing mono circuit and a line level output circuit to get from the receiver to the sub. It looks easy and the resistors are cheap. What order should I put them in? Should I have the mono conversion first out of the reciever, then convert to line output? Or should I convert to line first, then sum the signals before they go into the sub? I think summing bass to mono is silly but here goes. Use a 10K resistor from each channel and combine them on the end. At the summing junction, tie a 1 K resistor or therabouts, to common. The summing junction will go to the sub. The amplifier amplifies line level to roughly 10 times if full volume were used. I can't say the range of the sub level control, but I assume there is a level control. greg Thanks again! GregS wrote: In article . com, "joshnat" wrote: Thanks for the response. This is the Marantz I've got: http://www.classic-audio.com/marantz/2215.html It doesn't seem to have pre-amp outputs. I could sum the B outputs to mono and send them to the sub, but the sub has only a line input. Since the receiver would be sending an amplified signal and the powered sub would be amplifying the already-amplified signal, won't this be a problem? You may be able to use it like that, allthough summing channels is not really necessary for bass below 70 Hz, and you can extend that up a bit. The sell power to line level adaptors in car audio shops, allthough you can make one with a few resistors. greg Jos Mark D. Zacharias wrote: wrote: I have an old (70's) Marantz receiver with A & B 2 channel stereo. I also have a few-years old Pioneer powered subwoofer that only has a line level input. I'm not sure if I can use this sub with the Marantz. Any suggestions on hooking it up? I would like to set up as 2.1 or 4.1. Thanks! Not an ideal situation. Many Marantz models had pre-amp outputs - if the Pioneer has stereo (L, R) inputs you can just use those. You may need to use stereo splitters to get the signal out, them back into the Marantz. If it's a single input on the sub you could just use one channel of the pre-out, but you'll lose some bass content on at least a few albums. Not all are summed, despite what we are told. Or you could use a summing network of resistors to provide a mono output from the Marantz main amp output. 10K resistors would probably be a good place to start. Mark Z. |
#8
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
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#9
Posted to rec.audio.tech
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Old receiver, new(ish) subwoofer
joshnat wrote:
Thanks for the response. This is the Marantz I've got: http://www.classic-audio.com/marantz/2215.html It doesn't seem to have pre-amp outputs. I could sum the B outputs to mono and send them to the sub, but the sub has only a line input. Since the receiver would be sending an amplified signal and the powered sub would be amplifying the already-amplified signal, won't this be a problem? Josh Not really, maybe wouldn't hurt to pad it a bit though. I assume the Pioneer sub has a level control. Mark Z. |
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