Question about Kenwood 500W Class D Mono Amplifier with Crossover

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Humming noise..... i have my remote wire hooked up to a toggle switch so sometimes i forget to turn my amp off when i get out of my car and when i do that some times when i shut the door it makes my subs make a loud humming sound. it started to do this when i turned my amp power up over half way. i am running a 4gauge power and ground wire with a capacitor. any ideas whats going on?

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Try to isolate the grounds of the amp and that of your head unit. I mean 'lift' the ground connection. Just connect the hot side and not the ground wire - your amp's grounding and your head unit's grounding might have a voltage loop. smile when the hum dissappears.

Posted on Sep 25, 2008

  • jhun T
    jhun T Sep 25, 2008

    what i meant is the input grounds. The quickest way is to cut the RCA cord and split-off and cut the sheilds of the cable near the amp or near the HU. It is still a 'ground lift'.


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