Reply to thread

Message

<blockquote data-quote="kkmike" data-source="post: 391055" data-attributes="member: 552924">I had a new amp installed yesterday (JL 450/4) - my 2nd amp, and since the 1st amp (JL 500/1) was running off 8 gauge wire, they wanted to run 4 gauge.&nbsp; So now I have 2 runs of 4 gauge, 1 to each amp; but he also ran 2 runs of ground back to the battery.&nbsp; I have read numerous times that ground should be short and to the chassis.&nbsp; And it&#039;s a long run since this is a Suburban.&nbsp; He said JL recommends grounding these amps directly back to the battery and so that is what he did.&nbsp; Well now I have alternator whine that fluctuates with the speed of the engine; worse the higher the gains are set. The RCA&#039;s &amp;amp; speaker wire don&#039;t run along with the power wires, so I&#039;m hopeing I can rule that out (they do cross where they all meet up at the amps, but that shouldn&#039;t be a problem?)I don&#039;t want to go back and leave the car there again, it&#039;s a pain - I can do it myself - there is a seat bolt right there.&nbsp; So I have 2 questions; Is the ground most likely the problem, best place to start?&nbsp; And if so, should I disconnect the long ground and replace it with the short, or just add the short and leave the long ones too?Thanks,Mike</blockquote>

[QUOTE="kkmike, post: 391055, member: 552924"] I had a new amp installed yesterday (JL 450/4) - my 2nd amp, and since the 1st amp (JL 500/1) was running off 8 gauge wire, they wanted to run 4 gauge. So now I have 2 runs of 4 gauge, 1 to each amp; but he also ran 2 runs of ground back to the battery. I have read numerous times that ground should be short and to the chassis. And it's a long run since this is a Suburban. He said JL recommends grounding these amps directly back to the battery and so that is what he did. Well now I have alternator whine that fluctuates with the speed of the engine; worse the higher the gains are set. The RCA's & speaker wire don't run along with the power wires, so I'm hopeing I can rule that out (they do cross where they all meet up at the amps, but that shouldn't be a problem?) I don't want to go back and leave the car there again, it's a pain - I can do it myself - there is a seat bolt right there. So I have 2 questions; Is the ground most likely the problem, best place to start? And if so, should I disconnect the long ground and replace it with the short, or just add the short and leave the long ones too? Thanks, Mike [/QUOTE]

Verification