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I've been messing around with my system a lot lately. I've got cd player, in dash tv, amp and sub.

it bumps (feedbackish sound) everytime i switch sorces, turn the volume to zero, turn it off, etc. I watched the subwoofer and it actually flexes all the way out! not like quick but kinda slower than a hit. (solo baric 10' L5).

I've got RCA's running from HU to the amp in the trunk next to the power wire.
HU ---->RCA--->Amp--->Sub


I've got a bout a million wires behind the HU and tv, is it possible that certain wires close together can mess each other up? Could this be why my subwoofer is doing this? cause i do have video wires as well for the tv behind there.

i also tried something different. I unhooked one of the rear 6x9s and connected that wire to an RCA converter, then to the amp and it works fine. no problems.
HU--->Rear 6x9's--->RCA converter--->RCA--->AMP--->Sub

 
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come on. are there any common do's and don'ts when it comes to running wires? Like dont run RCA's next to power?

 
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what kind of head unit do you have?

 
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Pioneer DVH - P5000MP

 
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Never run signal and power wire next to each other unless absolutely necessary, that is rule #1. Also, the turn-on/turn-off thump is from a your different sources powering on/off at different times. If the amp is on before the head unit turns on= thump. Use a relay off the acc circuit of the car to daisy chain the aftermarket equipment as necessary. Cheap components can also cause unwanted noise. Good luck!

 
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first i'll try moving the power and rca's. i really do hope that works. next i guess i'm shootin for relay...

so will a relay delay the signal going to the amp? if i were to look for one on ebay or at a local electronic store what am i looking for?

thanks for the help!

 
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can I use that big bar behind the HU as a grounding point?

 
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http://www.digitalww.com/DVD_DV_8680.htm

youll have to call the guy to ask if it does VCD's