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I'm guessing this sound is only present when the car is running? have you tried switching your RCAs around, just to see if the sound in introduced by a certain set of RCAs? Where is your power wire ran? Is it right along side your RCAs? Try moving them away from each of if so? Check your grounds to...

I recently put in a new amp and rewired all my speakers. When turning on the amp and HU the speakers will make a loud constant humming/buzzing noise. The sound level stays the same whether the volume is up or down, it also does not change with acceleration. The only time it does change is when more ...