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Grounds ran to frame, swapped RCA cables, etc. Still noisy.
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<blockquote data-quote="longbedbob" data-source="post: 8602643" data-attributes="member: 673854"><p>OK, folks.</p><p></p><p>I am clearly fighting more than one problem.</p><p></p><p>Connecting a relay for accessory power and wiring my constant voltage direct to the battery has cured my static ills. Curiously, a noise filter on the accessory supply solved it as well.</p><p></p><p>However, I still have alternator whine.</p><p></p><p>Both the amp and the head unit are grounded directly to the frame. As if now, both the head unit and amp are receiving power directly from the battery. There should be no difference in potential.</p><p></p><p>Here's what I've tried:</p><p></p><p>1. Removed all RCA inputs from the amp. No whine.</p><p></p><p>2. Removed JL Audio 4 channel, twisted pair RCAs from the deck, ran directly across the center of the truck - *whine* So it would seem that I have induced whine across the RCA cables when they are removed from the head unit.</p><p></p><p>3. However, when I try out my shielded pair of cables.... removed from the head unit but connected at the amp - no whine.</p><p></p><p>4. When those same shielded cables are connected to both the head unit and the amp - *whine*.</p><p></p><p>5. Ipod connected directly to the amp - no whine.</p><p></p><p>What next?</p></blockquote><p></p>
[QUOTE="longbedbob, post: 8602643, member: 673854"] OK, folks. I am clearly fighting more than one problem. Connecting a relay for accessory power and wiring my constant voltage direct to the battery has cured my static ills. Curiously, a noise filter on the accessory supply solved it as well. However, I still have alternator whine. Both the amp and the head unit are grounded directly to the frame. As if now, both the head unit and amp are receiving power directly from the battery. There should be no difference in potential. Here's what I've tried: 1. Removed all RCA inputs from the amp. No whine. 2. Removed JL Audio 4 channel, twisted pair RCAs from the deck, ran directly across the center of the truck - *whine* So it would seem that I have induced whine across the RCA cables when they are removed from the head unit. 3. However, when I try out my shielded pair of cables.... removed from the head unit but connected at the amp - no whine. 4. When those same shielded cables are connected to both the head unit and the amp - *whine*. 5. Ipod connected directly to the amp - no whine. What next? [/QUOTE]
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Grounds ran to frame, swapped RCA cables, etc. Still noisy.
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