Alternator Whine??? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 03-29-2005, 07:06 AM
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I just installed a system into my car (1992 325is) and it seems to have some alternator whine problems. My system has the following specs: Orion CS 200.4 amp running 4X50 into 4ohms. This is powering orion 5.25 XTR speakers in the front. I have not yet connected any rear speakers. No the amp is not in bridged mode the other 2 channels are currently connected to nothing. Then I have a rockford fosgate 351M power amp 1X350 into 2ohms. This is powering an orion CS 12" DVC sub. My HU is a pioneer 7600MP with all 3 preamp RCA outs connected to rockford fosgate RCA wire. I run the 3 RCA cables along the right side of the center console until it pops out on the left side of the passenger seat. I then take it under the passenger seat, under the rear passenger seats, through the middle of the 2 back seats where they then connect to the amp's. With the volume all the way down, my left tweeter produces a soft static hiss. The right one however produces the hiss and a high pitch whining noise. When I rev the engine the noise gets louder and higher pitch. The left tweeter does not change. Another thing I should note is that I think I crossed over my R/L speaker connections because when i shift the sound to the left in the HU using the fader, it actually moves to the right. I know this switch is because I hooked up the speaker connections to the wrong places on the amp. I am going to try switching this and see what happens tommorow. Also, even when the deck is off, the high pitch noise remains. I am going to run some more simple tests tommorow. Any help would be greatly appreciated. Thanks
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#2 (permalink) Old 03-29-2005, 10:35 AM
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first you should connect your speakers the right way.

How many speakers whine?

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#3 (permalink) Old 03-29-2005, 07:50 PM
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The hiss is typically because the gains are too high. The L/R shouldnt make any difference as far as performance, noise, etc. Its just annoying going the wrong way. A quick switch of the RCAs will take care of that. The gains too high may also be the cause of the whine. Check that out and post from there.



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