Question about Sony XPlod CD Player w/MP3 Playback CDX-GT40W

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No sound to the subs

I've hooked my cd sony xplod cd player and everything works well but when i plug the rca jacks into amp from the cd player my subs make this pulsing sound that is really annoying and no music comes out. ive changed the rca cables thinking that was it but it still doesn't work and i can't figure out the problem, will someone please help.

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  • 30 Answers

Possible solution: Check to make sure your ground connection is connected to metal that is NOT covered in paint. This is not a solid connection and can ruin your amp over time. Simply scrap away the paint and re-connect. This was a problem i ran into recently.

Posted on Jul 27, 2009

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You didn't say whether the player is connected by 2 RCA cables (analog) or by digital cable. If by RCA, does the player have a headphone jack? I had a player once with a piece of a headphone that broke off inside the jack, muting the analog outputs.

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check your ohm load on the sub and see if your amp can do the same, That is why every time it shuts off into protection mode. Check your gain level on the amp to this is not a volume knob for your amp, It is to get both the amp and cd player on the same page. Hope this was helpfull

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How can i test my rca output jacks with a test light? pioneer deh p3100ub. hooked up spkr, nothing. tried one rca plug to white(lt) and then red(rt). Unit has 4 rca jacks, 2 for subwfr and 2 for front...


:) 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..


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1 Answer

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HI DUDE ,, TRY CHECKING UR RCA CABLE ,, COZ IT MIGHT B UNPLUGED AT UR PRE AMP OR PLAYER ... OR CHECK UR SUB WOOFER WIRE INSIDE THE BOX ....

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There is an otion to turn sub output on/off in the "audio menu". Hit " in lower left to turn sub out put on.

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I would replace the wire your sub is hooked up to and try hooking up the sub that was sparked to the opposite channel on the amp to make sure the amp is not the culprit. Also switch RCA cables L to R, R to L

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it might not be the amp that is not working it could be the sub or sub's. Try takeing a sub out of the box and look down the hole in the center of the magnet on the back of the sub and look and see if you can see any wire's or any thing that has come unwound in the sub and if you do see wire's then you have blown your sub. If you dont see any wires then you could completly disconect your amp for 20 to 25 minutes and then plug it back in and see if that fix's your problem. If none of this works then you can take your amp to an audio store and have them test the circut board in your amp.

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