Help with my subwoofer preamp L/R connection - AVS Forum
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post #1 of 8 Old 01-07-2013, 10:41 PM - Thread Starter
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Hi everyone!

I just bought a home theater that I'm really excited about.

I just read the user's manual of my AV reveiver (Onkyo TX-NR616) and my 5.1speaker kit (Polk Audio RM705) and I'm a bit confused about how to plug the subwoofer to my AV reciever.

The cable I got is: ROCKETFISH RF-G1214 12FT SUBWOOFER CABLE.

I'm not sure how many subwoofer cables I need and how to plug it proprely.

The AV receiver got 2 purple connectors for the sub (pre amp) and my subwoofer got 2 RCA connectors red and white (L and R).

I guess I need 2 cables to be plugged in each purple connector one to the red and the other to the white RCA connector of the subwoofer?? I'm I right??

I read in some forum that people are using Y adapter but I dont know how I can use it because I got 4 connectors (2 purple in AV reciever and Land R in the subwoofer)

Here is the link of my user's manuals :

AV reveiver: http://www.intl.onkyo.com/downloads/manuals/pdf/tx-nr616_manual_e.pdf

Speaker kit: http://www.polkaudio.com/downloads/manual/RM700_MN.pdf

Thanks very much
Excuse my bad english as this is not my mother tongue. wink.gif

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post #2 of 8 Old 01-07-2013, 11:14 PM
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You can use either, or both, of the subwoofer pre-outs....they're the same. Or get another sub and hook that up, too smile.gif Likewise you can use either of the L or R inputs, or both. It's up to you. If you have one cable pick one of the sub pre-outs and one of the inputs.
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post #3 of 8 Old 01-07-2013, 11:22 PM
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Your AVR is capable of driving two subwoofers. When you have only one, you use only one of the outputs. You also only need to use one of the inputs on the subwoofer. You can use a Y-adapter on the subwoofer if you want.
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post #4 of 8 Old 01-07-2013, 11:53 PM - Thread Starter
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Hi lovinthehd and Colm thanks for your replies

Which option is the best for better sound quality?

A) 1 cable from AV to ( L or R) the sub

or

B) 1 Y cable from AV to both L and R ?

or

C) 2 cables : on the from preamp to L and the other preamp to R (lovinthehd said I can use both)

May be there is no difference between theses 3 setups?
Thanks for your help!
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post #5 of 8 Old 01-08-2013, 12:48 AM
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Should be no difference. IIWY I would go with the easiest approach.
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post #6 of 8 Old 01-08-2013, 01:05 AM - Thread Starter
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ok thanks so much!

One last question, why is there a L/R into the sub if there is no difference between using only one or both ?
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post #7 of 8 Old 01-08-2013, 02:26 AM
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The manufacturer is trying to make the subwoofer as flexible as possible to appeal to as many customers as possible, and it costs them very little to do so. Some people have equipment with no subwoofer output and need to derive the signal from the left and right front channel signals.
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post #8 of 8 Old 01-08-2013, 09:55 PM - Thread Starter
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Perfect, thanks!
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