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This only started after a stupid scion rear ended me at a red light...lol.....Wheneve i turn on my sony headunit, my subwoofer and my components will violently pulsate and pop and no music plays regardless of the volume level.....almost makes a heartbeat sound.....all 4 speakers do this. Im running 15 mtx, clarion components, kenwood amp for the sub and phoenix gold amp for the components...... amps are grounded to the metal trunk latch.....

 
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check your signal cables. Also the trunk latch isnt a great ground spot, make a new one.

 
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if you take out your back seat there is a bolt to ground to under there. good luck.

 
Rep Power: 293

thanks guys, it turns out that it was my front rca's.....I will change that ground spot also....thanks again!!!