Pioneer deh-p7700mp powers up music plays threw amp & subs but no sound from front or back speakers worked fine for months just quit wrkn

Depending on the car and your setup sounds like the amplifier is not wired properly or an issue with adjustments on your deck itself. More info on your sound setup would be helpful.

Hi it's a problem in the set up . This model , like few other in the line have the possibility to switch the "back speakers" ( through harness or RCA) into "BASS SPEAKERS" what give you a possibility to hook up a Sub without an extra amp .
To switch it back just follow the Section 2 / Sw control of this link http://www.pioneerelectronics.com/StaticFiles/Manuals/Car/DEH-3300UB_OwnersManual0902.pdf

I'm not an expert but often people connect subs to normal speaker wires in back of the radio. You need a dedicated subwoofer line so high frequency sound doesn't go to the subs. Only bass. Sounds like it wasn't wired properly.

you cna switch the working rca's to the sub out put to check for sound if u get sound it means your rca's are bad but if no sound then your other outputs in your radio may be deffective

:) the rca jacks have to be connected to an amplifier,, their signal is too lay to even light a bulb.. you have to connect it to a car amplifier and then from the amplifier to the speakers..

Just so you'd know,, once your deck plays and you hear music on your speakers through your normal speaker wires,, RCA jacks work..

Ok you have 4 jacks,, 2 subs and 2 front.. These should connect to a preamp,, which takes 4 inputs and allows you to equalize or adjust how the music should sound,, now from the pre-amp,, it runs to an amplifier,, thats powers the subs and another that powers the speakers.. Some amps have 4 inputs so you can use one amp for your subs mids and heights..

for example a basic music system is

1 cd player
1 pre amp
1 amplifier (4 inputs, 4 channel out)

you bridge 1+2 and connect this to 1 12" double coil sub woofer

the next 2 connect to 2 mid speakers example "rockford or ev 5 / 8 " and 2 tweeters for heights..

Thats a kicking tricked out basic car audio system,,,

Hope that helps you understand how it works..

depending on how many channels the amp is, you may not be able to hook everything up to it.

usually you have a separate amp for subs. 4 channel amp for the speakers in the car, and a mono amp for the subs.

To hook them all up to the same amp you would need an amp with 5 channels. It wouldn't work out right.

If you have a mono amp its only for subs.

If you have a 2 channel you can either hook it up to the rear speakers or bridge them to mono to run the subs.


you need a channel per speaker basically.

it sounds like you have the polarity of the speakers hooked up wrong on one of them, try unhooking the new speakers you added and hook them back up one by one, when the music gets fuzzy then reverse the wires for that speaker, this should cure your problem.

Make sure that the FIE (front image enhancement) is off. If it is on, the rear outputs are muted.

have you just installed the sub and if so tell me how you did it. you can actually turn off the rest of the speakers if not careful.

Brand of Deck?