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Car Audio Help
Wiring, Electrical & Installation
At wits end, tried (almost) everything fixing bad crackle and pop when engine running
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<blockquote data-quote="Quinn000" data-source="post: 8300621" data-attributes="member: 662491"><p>I don't know if I have the brain power to correctly describe my problem, but I'm hoping this forum will be nice enough to guide a car audio newbie.</p><p></p><p>I've spent the past 5 days rewiring and trying every known possible fix to this problem (which I don't even know what to call)</p><p></p><p>My speaker system:</p><p></p><p>Kenwood kdc x997</p><p></p><p>SSL 50rms x 4 amp</p><p></p><p>Pioneer speakers</p><p></p><p>****** speaker cable</p><p></p><p>It all sounds great until the engine turns on. I get:</p><p></p><p>Bad alternator whine (gets progressively worse the longer the engine is on WEIRD)</p><p></p><p>Hiss and crackle with the occasional pop</p><p></p><p>THE WORST: sound randomly cuts in and out, this gets progressively worse and more frequent the louder the speakers are playing.</p><p></p><p>Again, no problem with the engine off.</p><p></p><p>Things I've tried to fix:</p><p></p><p>Checked ground for amp and HU, regrounded with progressively thicker wire, directly to sanded thick bare metal.</p><p></p><p>Checked power, run directly from battery with fuse opposite side of RCA lines</p><p></p><p>Changed rca cables 4 seperate times, amp still crackles when disconnected from HU</p><p></p><p>Used RCA to AUX directly from phone to Amp. Same crackle pop cuts</p><p></p><p>used homemade Ground loop isolator, no change</p><p></p><p>Used storebought passive inline power filter, no change</p><p></p><p>Run high level outputs to high level inputs on amp, removed RCA wiring ( I actually flipped my lid when this didn't work) no change.</p><p></p><p>FINAL STRAW:</p><p></p><p>Ungrounded amp and HU, used seperate battery to power both while engine running (guaranteed ungrounded from rest of elec. system) exact same problem</p><p></p><p>I am fairly comfortable with electrical systems, but this problem makes no f****ng sense to me at all!</p><p></p><p>All of this is in a beat up 1976 Chevy Nova, I just installed a brand new engine and checked all of the electrical. Spark wires are fully connected, but the distributor shocks you if you touch it. I haven't figured out that problem, and it may just be the solution, but I was looking for some advice. WHAT THE HELL IS GOING ON!?!?</p><p></p><p>I am a broke college student who has no time or money to take this to a shop, I'd be happy to provide any additional information. All wire is of correct gauge according to that one online wire chart with the colors.</p></blockquote><p></p>
[QUOTE="Quinn000, post: 8300621, member: 662491"] I don't know if I have the brain power to correctly describe my problem, but I'm hoping this forum will be nice enough to guide a car audio newbie. I've spent the past 5 days rewiring and trying every known possible fix to this problem (which I don't even know what to call) My speaker system: Kenwood kdc x997 SSL 50rms x 4 amp Pioneer speakers ****** speaker cable It all sounds great until the engine turns on. I get: Bad alternator whine (gets progressively worse the longer the engine is on WEIRD) Hiss and crackle with the occasional pop THE WORST: sound randomly cuts in and out, this gets progressively worse and more frequent the louder the speakers are playing. Again, no problem with the engine off. Things I've tried to fix: Checked ground for amp and HU, regrounded with progressively thicker wire, directly to sanded thick bare metal. Checked power, run directly from battery with fuse opposite side of RCA lines Changed rca cables 4 seperate times, amp still crackles when disconnected from HU Used RCA to AUX directly from phone to Amp. Same crackle pop cuts used homemade Ground loop isolator, no change Used storebought passive inline power filter, no change Run high level outputs to high level inputs on amp, removed RCA wiring ( I actually flipped my lid when this didn't work) no change. FINAL STRAW: Ungrounded amp and HU, used seperate battery to power both while engine running (guaranteed ungrounded from rest of elec. system) exact same problem I am fairly comfortable with electrical systems, but this problem makes no f****ng sense to me at all! All of this is in a beat up 1976 Chevy Nova, I just installed a brand new engine and checked all of the electrical. Spark wires are fully connected, but the distributor shocks you if you touch it. I haven't figured out that problem, and it may just be the solution, but I was looking for some advice. WHAT THE HELL IS GOING ON!?!? I am a broke college student who has no time or money to take this to a shop, I'd be happy to provide any additional information. All wire is of correct gauge according to that one online wire chart with the colors. [/QUOTE]
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At wits end, tried (almost) everything fixing bad crackle and pop when engine running
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