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<blockquote data-quote="DeuceLee" data-source="post: 3482764" data-attributes="member: 567709">helped buddy install system and now have alternator whine...car: 99 toyota solarahu: 4-5 year old kenwood mid grade (2 sets of preouts)sub: cvx 12amp: zx750.1speakers: all stock jbl factorywe did tried to set the gains with the dmm, we were going to disconnect the speakers but forgot to do so and had it all hooked up so we said screw it and just played a 50hz -3db test tone, put the high pass on the speakers at 180hz...unfortunately some of the bass still got out to the speakers and the front left seem to have blew up...now we get a alternator whine when the car is turned on...NONE when its just on ACC, but when it&#039;s turned on, there is a hissing noise, and when driving, the rev&#039;s increase the noise...we&#039;ve tried a ground loop isolator and tried the grounding of the rca cables trick...neither worked, any other suggestions?the wiring grounding trick worked magically with my pioneer 880prs, but obviously not in this case...HELP!!</blockquote>

[QUOTE="DeuceLee, post: 3482764, member: 567709"] helped buddy install system and now have alternator whine... car: 99 toyota solara hu: 4-5 year old kenwood mid grade (2 sets of preouts) sub: cvx 12 amp: zx750.1 speakers: all stock jbl factory we did tried to set the gains with the dmm, we were going to disconnect the speakers but forgot to do so and had it all hooked up so we said screw it and just played a 50hz -3db test tone, put the high pass on the speakers at 180hz... unfortunately some of the bass still got out to the speakers and the front left seem to have blew up... now we get a alternator whine when the car is turned on...NONE when its just on ACC, but when it's turned on, there is a hissing noise, and when driving, the rev's increase the noise... we've tried a ground loop isolator and tried the grounding of the rca cables trick...neither worked, any other suggestions? the wiring grounding trick worked magically with my pioneer 880prs, but obviously not in this case...HELP!! [/QUOTE]

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