Balanced Sub Output from RX-A810? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 5 Old 07-15-2013, 09:44 PM - Thread Starter
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Hey everyone. I tried searching around and I think I'm understanding this correctly, but was hoping to get some confirmation.

I'm looking at hooking up an EP4000 to an RX-A810 to power a subwoofer. It looks like the only sub out the RX-A810 has is an RCA output, which is unbalanced.

I was looking at using an RCA to XLR cable, which would obviously be unbalanced. The alternative looks like it would be RCA to 1/4 TRS. Is one better than the other? Would there be any issue running an unbalanced RCA to XLR cable besides possible noise?

Thanks!
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post #2 of 5 Old 07-17-2013, 08:09 PM - Thread Starter
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post #3 of 5 Old 07-17-2013, 08:26 PM
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Why does it matter if you're sending a balanced vs unbalanced mono signal to your EP4000 amp? Please elaborate as I'm not familiar with XLR connections.

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post #4 of 5 Old 07-17-2013, 08:31 PM
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post #5 of 5 Old 07-17-2013, 09:20 PM - Thread Starter
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Quote:
Originally Posted by afrogt View Post

Why does it matter if you're sending a balanced vs unbalanced mono signal to your EP4000 amp? Please elaborate as I'm not familiar with XLR connections.

XLR and TRS are 'balanced' because they have a positive, negative and ground. The positive and negative essentially run at opposite polarity so you end up with almost no noise. RCA and TS are 'unbalanced' because one cable acts as negative and ground, so it has to do more work (and you lose the noise canceling of a balanced cable). If you run RCA -> XLR or RCA -> TS you end up with an 'unbalanced' cable.

With an unbalanced cable you lose sensitivity and introduce noise. You also can't run as long of a wire.

I've seen some people with issues running RCA to XLR connectors.

What I wasn't sure of is things are designed to accept one or the other so there could be an issue mixing and matching them.

If you search 'Balanced (XLR, TRS) Vs. Unbalanced (RCA, TS) Connection' you can get a good read.
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