Question about Onkyo TX-SR804 7.1 Channels Receiver

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Need help hooking up a KRK powered subwoofer to an Onkyo 7.1 receiver

I have this powered KRK subwoofer that has left and right RCA, TRS and XLR plugs as inputs, but my receiver only has one line level out for a subwoofer (guess it's typical for home theater receivers).

The KRK guide that comes with it, has wiring schematics to a headphone 1/4" jack? How can I use the subwoofer's line level output (purple RCA plug) as source for my subwoofer?

How would I correctly wire these components together? My receiver is an Onkyo TX-SR805.

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A single male rca spliting into 2 male rca's ....a signal splitter

Posted on Oct 30, 2008

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Let's prove the sub works. Set its volume about half-way, cutoff= 170Hz. Temporarily connect an RCA cable from its Line Input to one of the Tape Out connectors on the Onkyo and play some FM through it. If it's alive you'll hear the low end of the music.

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The RCA output drivers will "fight" each other. Some things will appear to work, but give poor performance.

You could make a rudimentary passive mixer by putting a series resistor say 1K ohms from each of the RCA's to a common UNBALANCED input of a subwoofer.

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UNLESS the subwoofer has EQ in it, you really need to have an EQ in the little mixer so that you don't send high's to the subwoofer... They don't like highs and the sound will suffer.


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