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    Help!....horrible Whine After Installing Active Sub To A3 Sprtbck

    Hi Simon, I checked the earth to the aftermarket amp and relocated it as it did seem a bit naff, sanded all around the hole and made sure it's nice and tight, it's earthed directly to the body. I sprayed contact cleaner in the Bose amp and connector. And I checked the battery earth cable and all...
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    Help!....horrible Whine After Installing Active Sub To A3 Sprtbck

    Hi Gaffer, I know this was a couple of years ago but I don't suppose you have the solution to the problem do you? I've had a good read through this and I'm having the exact same problem (indicators, brakes and alternator whine etc) it only seems to be when I indicate right which I thought it...