Question about Onkyo TX-SR304 Receiver

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Very low ouput from subwoofer preout

My Velodyne VX-10b is connected to my Onkyo TX-SR304 via the sub preout from the receiver. I barely get any bass signal coming out of it at all.

In order for me to get any bass, i have to set subwoofer to "No" on the receiver and run my front left/right channels through my subwoofer amp, and set the crossover on my subwoofer.

Any reason why my sub preout on my onkyo is barely putting out any sound to my sub? i've gone through all the settings and can't find anything wrong?

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  • Anonymous Mar 29, 2008

    I'm having the exact same problem, did you find a fix?

  • Anonymous Apr 16, 2008

    Same problem. I set crossover to 200. Still hosed up. Guess I'll return this as I've read of this problem on the web.

  • Phogg76 Apr 28, 2008

    Onkyo SKW-402 subwoofer connected to sub pe-out on the OnkyoTX-SR304 5.1 Receiver. Subwoofer will go into "standby mode" after a few minutes, even with LFsignal present. Must disconnect and reconnect RCA connector from the amp (sub pre-out) to regain signal. Does not matter what the signal source is, tuner, cd, dvd, video, etc. Crossover on receiver is set at 120hz, sub selection at "yes", subwoofer crossover set at 200hz.

    Very frustrating. Assumed better performance with an Onkyo to Onkyo set-up. Guess I was wrong.

  • stephen jaeger
    stephen jaeger Jan 07, 2014

    I thought I had read that the sub out (pre) is for a powerede sub. That is what I have hooked up and it is working fine.

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Onkyo to Onkyo, sub/receiver, problem fixed by inceasing volume on receiver. Seems the sub audio input does not pick up LF's below a certain output level from the receiver. So, guess I have to live with that. I only hope my nieghbor in the apartment below me can too!

Posted on Apr 29, 2008

The problem was that some subwoofers (inluding my velodyne model) cannot process the LFE signals through the line level inputs on its amps, so the other way to run your subwoofer is to run the front left and right speaker outputs from your receiver to the speaker-level inputs on your sub, and then plug your front and left speakers into the soeaker level outputs on the sub. you have to set the onkyo receiver to "Subwoofer: No". that way the LFE signals are sent through the front speaker channels and you will get the same BASS output as if using the line-level input. O So yes it does require a bit more speaker cable, but it works fine now.

Posted on Apr 18, 2008

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