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Originally Posted by RandallNeighbour
Jim, I've had this noise in every single aftermarket audio system I have installed in cars when the alternator was working just fine or even brand new! To say that xclusivecar needs to have his alternator checked out because there's a little remaining whine is quite speculative and reaching if you ask me.
xclusivecar, if you're happy with your system, drive the car and crank up the tunes while you're at it. I certainly wouldn't spend any money to have an alternator checked out if your battery isn't weak... alternator noise is typical in high powered head units and amps and I always assume it will be there if I don't use a filter.
Jack, I see what you're saying... so what do the high end amp manufacturers do to eliminate the ever-present alternator whine without filtering that "chokes" down the power?
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Hi,
Randall, I too have installed several high-end, high power stereos in my cars and friends. Most recently a Nakamichi 400 HU and 4/100 Nakamichi Amp w/ 8 Focal speakers in my Esprit. Being essentially a
Plastic car, with few ground points, this was especially tricky. But, I have never had an Alternator whine that I couldn't track down and eliminate.
Whether it's careful routing of the RCA cables away from power lines or harnesses, isolated grounds,. tracking down and eliminating Ground Loops, grounding antennae or failed Alternator Diodes, I have always been able to eliminate any noise even with a high gain setting.
Now, I can't speak with the authority of our esteemed EE, JackG, but I do know these noises can be eliminated, though it can expand your vocabulary getting there...
Happy Motoring!... Jim'99
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