Question about Pioneer DEH-P2900MP CD Receiver /AM/FM/MP3/ CD Player

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Big bass My big bass speaker dont thump no more, power is goin to everything, is there a button on the face I might have hit with my big fingers? Could it be the speaker itself? Or is it the tunner? The amp says all is good but nothing is coming out my big speaker. I don't over play it where it would blow so what is it ?! pls thank you!

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Hi there
you hit a button marked SW press this button again and subs will turn on its the first button located next to number 6 on your unit
hope i was able to solve your problem

Posted on Mar 05, 2009

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Posted on Jan 02, 2017

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My infinity reference 7540a amp cuts in and out with heavy bass when the ''loud'' feature is on. I redid my ground, remote wire, shortened my power cable, and double checked all speaker connections. I dont...


sounds like ur gains are set to high and is going into protect mode

also what ive seen happen before is the speakers (if mounted in metal shelf or door and arnt bolted down correctly can flex under bass notes and flex the speaker that much the termanls short onto the metal and amp hits protect mode
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Did you have it hooked up by a professional or did you (or someone you know) do it. If a shop/pro didnt do it make 100% sure everything is hooked up right. Increase the size of your power wire from your battery to the amp. Check your gain settings on the amp. If the vehicle you have this in has a trunk (not a hatch back), position your speakers against the back seat facing you as your putting them in the trunk. If none of this works, buy bigger speakers and more power!

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1 Answer

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Hi Jamesroy,

Remove the Audio inputs from the bass box to see if the thump is coming from the Audio input. Of course do this with everything turned on. What we are trying to figure out is where the thump is originating from. If the bass box does not thump when the audio inputs are disconnected, the thump is coming from somehwere between the bass box and the circuits inside the head unit.
If you still have the thump after the Audio input wires are disconnected, then your bass box's amplifier has noise problem. You might try getting a noise filter from best buy to put on the power supply feeding the bass box.

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