How to connect 2 outputs to 1 input

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markcars

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Joined: December 11, 2002

Location: New York, United States

Posted: December 09, 2004 at 2:39 PM / IP Logged

If you have two outputs from a HU (L and R for the sub) and one input in the Amp, how would you connect these three wires? I don't think a Y connector would do since it would just kinda short or mix the two channels or is it not so?. What is the way to connect?

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Joined: November 01, 2003

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Posted: December 09, 2004 at 5:24 PM / IP Logged

Just use the left input, the amp is looking for a mono signal.

Top Secret, I can tell you but then my wife will kill me.

markcars

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Location: New York, United States

Posted: December 10, 2004 at 8:44 AM / IP Logged

Thanks Rob. I appreciate the response.

The second wire (second Channel) was hanging and will remain hanging then.

I was curious and wondering if we were losing half the bass output by not using the second channel.

Thanks again.

Mark

mbergwin

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Joined: December 10, 2004

Location: United States

Posted: December 10, 2004 at 9:17 PM / IP Logged

i would use a Y conector because if the music u listen to has a left / right fade to it you would lose that fade throw your subs. unless of course your subs are in mono mode, then i would go with rob's sudjestion.

you would lose NO bass

-Bergwin

haemphyst

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Joined: January 19, 2003

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Posted: December 11, 2004 at 9:19 AM / IP Logged

HOWEVER, the balance does come into question. *IF* you were to set the balance for some reason to the right, you would have no bass - at all. Go to Radio Shack, get a single male to two female RCA "Y" and plug it in. (BTW their catalog number is 42-2608 - you're welcome - LOL) It will not hurt your deck, and you will have all of the bass, in all settings.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

stevdart

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Posted: December 11, 2004 at 9:47 AM / IP Logged

This is what Perry Babin (BCAE) wrote about using a Y-splitter as a combining device:

Things you shouldn't do:
A y-cable should NOT be used to connect 2 outputs from a head unit, EQ, or other device. It cannot be used to mix 2 signals together to provide a single non-fading output. If 2 outputs are connected together (via a y-cable) and they don't match EXACTLY, one output will be trying to drive the other to match itself. This will likely not damage anything but WILL likely cause the output signal to be distorted.
I've always had this in the back of my mind, so haemphyst, do you place any value in what he says here?

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: December 11, 2004 at 10:16 AM / IP Logged

Cross-channel cancellation by using a Y-connector to mix L and R is possible but generally insignificant, especially in the bass region. Distortion from mixing two signals is not likely. What he may be talking about is the need to set amplifier input gain AFTER installing the Y-cable, not before, as the signal level on the output will be higher...

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How to connect 2 outputs to 1 input

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