Psych0matt Posted May 12, 2011 Report Share Posted May 12, 2011 Why would my sub hum when the engine is running, but be fine when off Its like something is coming through the stereo. It goes away for a second when I switch sources Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 12, 2011 Report Share Posted May 12, 2011 does the tone change with different engine speeds? Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted May 12, 2011 Report Share Posted May 12, 2011 Ground loop? Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted May 12, 2011 Author Report Share Posted May 12, 2011 does the tone change with different engine speeds? Rpms. It sounded like I had a V8 Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted May 12, 2011 Report Share Posted May 12, 2011 Alternator noise? Ground the head unit out your self. And Clean the ground for your sub. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted May 12, 2011 Author Report Share Posted May 12, 2011 Sub ground is brand nw, I'm thinking HU ground Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted May 12, 2011 Author Report Share Posted May 12, 2011 nope, amp issue! Once I started messing with it I remembered that if I had the gain up a certain way it'd do that, so I just have to keep it below that spot. Works great now! Quote Link to comment Share on other sites More sharing options...
Addicted2bass Posted May 12, 2011 Report Share Posted May 12, 2011 Most likely the amp is going bad, or you may have been turning the gain up to high. Although that usually doesnt cause engine noise, just clipping. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted May 12, 2011 Author Report Share Posted May 12, 2011 I ran that same amp for well over a year just fine, and it's doing fine now I think something in the pot is messed up, but if I keep it under then it's just fine. That spot is a fair bit further up than I turn the gain up anyways Quote Link to comment Share on other sites More sharing options...
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