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Looking for Unusual Subwoofer Cable

post #1 of 15
Thread Starter 
My brother has an old sony S/W that has the clamps for connecting speaker wire to receiver. Where can I find a cable that has 2 bare wires on one side, and a normal banana plug for a modern Receiver/AVR? Can I just buy any S/W cable and cut off the plug one the suboofer side, and connect the 2 wires to his old subwoofer?
post #2 of 15
no.

there are two things going here.

the speaker level runs at amplified power.

the rca runs at unamplified or "signal" level power.

if you plug amplified level power into a signal level input you will just clip it all over the place and potentially damage the system.

if you run a signal level into amplified aka speaker level inputs, it won't have enough power and you will hardly hear anything.
post #3 of 15
Quote:
Originally Posted by Av8tr View Post

My brother has an old sony S/W that has the clamps for connecting speaker wire to receiver. Where can I find a cable that has 2 bare wires on one side, and a normal banana plug for a modern Receiver/AVR? Can I just buy any S/W cable and cut off the plug one the suboofer side, and connect the 2 wires to his old subwoofer?

Quote:
Originally Posted by LTD02 View Post

no.

there are two things going here.

the speaker level runs at amplified power.

the rca runs at unamplified or "signal" level power.

if you plug amplified level power into a signal level input you will just clip it all over the place and potentially damage the system.

if you run a signal level into amplified aka speaker level inputs, it won't have enough power and you will hardly hear anything.

He's talking about a banana plug...not RCA...

OP..yes, if you take a cable that has banana plugs on both ends, and chop off one end, you'll be fine. You can even take bare speaker wire and screw/solder/crimp banana plugs on just one end and you'll be fine.

Now, that being said, I hope by "banana" plugs, you did mean what you said, and not RCA....right?
post #4 of 15
kapone, if you are right about the banana plug, then you are right. :-) banana plugs on the output of a modern avr for the sub would be really odd, as it would mean the avr is powering the sub. i think the op is confusing banana plug with rca, but who knows when it comes to htib's.
post #5 of 15
Pictures! of the back of the avr and cable and we would be able to tell you for certain what you are looking at..
post #6 of 15
Thread Starter 
I did not mean RCA. He has what I assume is a "banana plug" input for the AVR. It's the same as every other AVR I've ever seen including my Denon 3311. He just has this old Sony subwoofer (piece of junk I'm sure), and it has the usual black and red clamps for connecting speaker wire. I believe Kapone offered the best solution saying we could take normal speaker wire, and put a banana plug on one end, and leave the other end bare to connect to the subwoofer. I wasn't sure if subwoofers used the same wire as other speakers. If that is the case, his solution is perfect.
post #7 of 15
banana plugs.. like these?



cause those are RCA...

bananas are



if the back of his avr looks like this,



then its RCA not banana...
post #8 of 15
Quote:
Originally Posted by Av8tr View Post

My brother has an old sony S/W that has the clamps for connecting speaker wire to receiver. Where can I find a cable that has 2 bare wires on one side, and a normal banana plug for a modern Receiver/AVR? Can I just buy any S/W cable and cut off the plug one the suboofer side, and connect the 2 wires to his old subwoofer?

It sounds like your brother has a passive subwoofer that was most likely part of a hometheater-in-a-box. If you must use it, then any cheap plate amp would be good solution.

JP
post #9 of 15
Thread Starter 
The one he's looking for is like your 2nd pic, except it's only one wire going into the AVR. It looks like a normal speaker input, not RCA, but there is only one opening for the subwoofer; not 2 like a black and red speaker input.

I have a Denon 3311 AVR and I do know the difference between RCA and speaker connections. He just bought a new low end Pioneer AVR and it has the typical subwoofer connection. The only anomoly is the old Sony subwoofer which simply has the black and red speaker clamp connections instead of the usual banana plugs.
post #10 of 15
Thread Starter 
Quote:
Originally Posted by zora View Post

It sounds like your brother has a passive subwoofer that was most likely part of a hometheater-in-a-box. If you must use it, then any cheap plate amp would be good solution.

JP

That's exactly what he has. Any yes, I have tried to get him to buy some decent speakers, but he can't right now. I don't know what a cheap plate amp is, but wouldn't a regular speaker wire work just to connect to the AVR? He is still using the rest of the speakers that came in the hometheater-in-a-box, and they work fine.
post #11 of 15
I'm confused. What modern receivers have powered subwoofer outputs? And what good is a single 'banana' plug anyway? Any single speaker, subwoofer included, requires both polarity connections... being positive negative, red black....
post #12 of 15
Took a look at the denon 3311 just to be sure. Low res pics on my phone, but all I see for subwoofer out is an RCA connection. No powered subwoofer output using banana plugs.

I'm pretty sure you're trying to connect a line level, unamplified RCA subwoofer output into a subwoofer having only speaker level, amplified level, inputs (red and black spring clamps). If the subwoofer plugs into the wall (ie, has it's own amplifier), it is remotely possible to get working using some surgery to bypass the first stage of the input. If it doesn't plug into the wall, you're out of luck. I think it is highly unlikely that his avr will have amplified subwoofer outputs to power the sub. You should know by taking a quick look... amplified outputs will require both black and red (positive and negative) for the sub. Can't think of any stand alone avr made anytime recently that would have this. HTIB receivers sometimes do.

As said before, cutting the end off an RCA cable just won't work. A plate amp or really cheap prosound amp are probably the only options, unless one of you has an old avr or stereo receiver in a closet somewhere that can serve as a poor temporary solution.
post #13 of 15
Thread Starter 
Ok, I'm sorry for confusing you guys and making stupid assumptions. I took a closer look at MY Denon and of course it IS RCA. I was confused because I thought subwoofers and speakers used the same cables. I have to assume that my Brother's new AVR is also RCA.

That being cleared up, I don't know what to tell him. His old Sony subwoofer has the red and black clamp connections. How can he hook it up to his AVR with an RCA subwoofer input? Judging from earlier in this thread, it is probably not worth even trying. He needs to bite the bullet and pickup a decent newer subwoofer; correct?
post #14 of 15
And so I must apologize to LTD. You were right.
post #15 of 15
Or just run his pre out sub (rca) to a cheap plate amp <100rms, then to his Sony sub..
like...
http://www.parts-express.com/pe/show...number=300-784
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