Question about Pioneer VSX-D557

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Subwoofer pre-out not working

Recently I noticed my sub was not working with my set up. At first I thought it was the cable connecting the sub to the receiver, I got a new one but that didn't work either. I connected the speaker A wires to the sub then to the speakers and that got my bass back. I'm still not sure why the pre-out doesn't work though. On the receiver itself when I select channel output with the remote I use to get the options for centre speaker, rear speaker and then subwoofer. Now when I select the the channel select option the subwoofer option doesn't even appear anymore. Do I need to reset the receiver to get this option back to get the preout working again? If so how do I do that? Or is the pre out for the sub just burnt out and not usable anymore?

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Posted on Jan 02, 2017

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SOURCE: Subwoofer preout and bass

did you tell the receiver that you have a subwoofer connected (thru the quick setup)?

Posted on Aug 05, 2008

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SOURCE: No Sub Woofer Pre out output

I've got the same model and the pre out transistor needs to be replaced,
sometimes you can get it to work by unplugging the reciever and the pre out
then plug in the reciever and plug the pre out in a couple of times or so untill it comes on
or unplug the amp from the wall then plug in the pre out , turn on the reciever wait for sounds to come on then plug in the amp.
if that don't do it the pre out transistor needs to be replaced

Posted on Oct 16, 2008

  • 8546 Answers

SOURCE: I just bought a pioneer

RTFM. The manual is available at

Some setup is required, like telling the receiver you have a subwoofer and setting speaker levels. Modern avr's are NOTplug and play.

Posted on Aug 19, 2010

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Recheck all connections making sure to twist the RCA head as you install it so oxides will be worn off.

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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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On my pioneer receiver if the speakers are set to large the sub-pre-out only works if the receiver is in a surround mode, if its in stereo mode and the speakers are set to large the sub-pre-out is dead. If the speakers are set to small the sub-pre-out works all the time.
Also, some receivers won't send a signal to the sub-pre-out if there is no LFE discreet signal info from the dolby digital or dts bitstreem.
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In my basement I also have a kenwood dolby digital receiver.
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One of two things may be going on.

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The speaker may be bad. that may have blown the fuse.

You can test the speaker with a "D" battery.
Take the amp section out of the back, disconnect the speaker leads.
Touch the speaker leads to the poles of the battery. it should make a little thump and the cone should move freely.

Contact Velodyne for service.

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