Main amp power should be coming directly off of the positive battery terminal with a fuse or breaker right at the battery, then back to the amps.

A good and clean chassis ground beside the amps should be sufficient if there are not problems elsewhere. Rather than a twisted-pair type arrangement I'd try grounding at the chassis first.

Run the pre-amp signal wires as far away from the power wires as possible. Power down one side and signal down the other is the cleanest, as far away as you can is best. But if the noise is coming from real dirty altenator power, then moving things may not affect anything. Speaker wires won't be affected to the same extent because of the magnitude of the power that is required to drive the physical motors, but it wouldn't hurt to get them away from the power too.

Before replacing anything it would probably be worthwhile to take an O-scope and see what the power looks like coming from your altenator, check how relatively clean or dirty that power actually is--it should be a mostly DC signal, but the noise is coming from somewhere... I've never had one apart or looked at a circuit diagram, but there has to be at least a rectifier and cap in your altenator and it is possible that you need an altenator rebuild. Has your volt meter been reading anything funny?

Test and put a decent-sized cap in series in the ground wire of your components to see if that cleans things-up (it should).

I imagine that the noise follows your engine rpm? Sounds dumb, but there isn't any noise when the engine isn't running right?

If you still have the problem after moving your power away from your pre-amps my next bet would be failing altenator electronics.

posted by 67.10.24...

• Need electrical engineering help..., Jeff Cunningham, Wed, 30 Mar 2005 16:11:33
  • Re: Need electrical engineering help..., Kenw51, Thu, 31 Mar 2005 01:32:29
  • Re: Need electrical engineering help..., Drew in Houston, Wed, 30 Mar 2005 23:46:45 <-- Viewing This Message
    • I have never heard of putting series cap in the ground, Bill Homer , Thu, 31 Mar 2005 12:21:56
      • Re: I have never heard of putting series cap in the ground, Drew in Houston, Thu, 31 Mar 2005 23:44:52
  • Re: Need electrical engineering help..., TML , Wed, 30 Mar 2005 18:36:06
    • An older pioneer premier..., Jeff Cunningham, Wed, 30 Mar 2005 19:25:29
  • Re: Need electrical engineering help..., acoth, Wed, 30 Mar 2005 17:26:11
    • Here's a picture of my stereo, Jeff Cunningham, Wed, 30 Mar 2005 18:10:09
      • Re: Here's a picture of my stereo, Lawrence, Thu, 31 Mar 2005 18:50:17
        • Common Grounds, Bill Homer , Fri, 1 Apr 2005 07:47:07

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