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  1. humming amps, not speakers

    Technical & Advanced Car Audio Discussion
    Hello. I find there are a lot of posts about audible hum through speakers... this is different though. My AMPS are audible. I'm gearing up for an install and doing some hook ups on the bench lately. When I run my ppi pc2600.2 and pc21400.2 even at low/moderate levels, I hear some musical hums...
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