Hooking a sub to an integrated amp

Discussion in 'Speakers & Subwoofers' started by Shannon S., Mar 5, 2004.

  1. Shannon S.

    Shannon S. Stunt Coordinator

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    I have been hooking my subwoofer into my integrated amp(which does not have sub/lfe line level output) using the speaker level input and output on the sub and amplifier. Is there a way to do this using the subs line level in and the pre out on the amplifier?
     
  2. Wayne A. Pflughaupt

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    If the sub has a line level input (RCA jack) then I assume it’s a powered sub. Which makes me wonder what you’re using a separate amp for.

    Yes, if the sub has a line input, you can feed it directly from the receiver’s sub out jack.

    Regards,
    Wayne A. Pflughaupt
     
  3. ChrisBee

    ChrisBee Stunt Coordinator

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    Hi,

    I don't think Shannon has a sub-out socket Wayne. [​IMG]

    I have the same active sub feed problem from my stereo amp. It has no sub-out socket either.

    Feeding an active sub should be simple if you have a pre-out socket Shannon. Just run a long (mono) phono (RCA) cable from the pre-out socket on the back of your amp to your sub's lo (low) level in socket.

    The pre-out socket is simply full frequency range at line (low) level. There is no need to provide a stereo signal to the sub. A single mono cable will do.

    A dedicated sub-out socket is mono, lo (line level) that has most of the higher frequency signals removed leaving just the bass. It is usually adjustable for level & cut-off frequency via a high quality low-pass filter built into the AV receiver/processor.

    But your sub's own in-built filter will take care of removing the higher frequencies for you and leave you with just the deep bass.

    You can now experiment with your sub's cut-off point and output level (volume) to match your main speakers. (Hopefully your sub has a cut-off frequency adjustment knob).

    I hope this information is correct and would welcome any corrections. As I hope to do the same with my own stereo amp when my sub arrives.

    ChrisBee
     

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