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<blockquote data-quote="beastyle" data-source="post: 20649" data-attributes="member: 542068">I want to make a bet on this //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifI say that if he has the rca(&#039;s) and power cables running next to each other and he takes them apart so they each go on one side of the car he&#039;ll still have this problem.This problem is &quot;bad&quot; grounding which can come out of several sides:1. Bobine hood of battery charger (dynamo)2. General (orginal) car grounding contains a lot of dirt3. Amplifier generates the soundCleaning grounds is always a good thing, but if i was you i would just drive to any audio store and let them test your system when a LT2 (caliber) filter is placed on the RCA port that connect to your rockford-400, the sound will probally be gone then.The LT2 filter is a &quot;ground loop isolator&quot; which will solve your troubled sounds but considering the equipment you got you probally dont want to go filtering, the bobine hood of the battery charger is most likely to be the real &quot;bad sound&quot; generator so you would have to check/replace that (bobine aint very pricey).The LT2 filter will &quot;destroy&quot; sub functions if you got a amp thats connected from a amp that lies after the LT2 filter.GL &amp;amp; peaceEditted: Option 3 is not likely to occur on a rockford amplifier, i heard it once on a low-budget marquant amplifier which generated this sound, after putting in a PG at that place the sound was totally gone.</blockquote>

[QUOTE="beastyle, post: 20649, member: 542068"] I want to make a bet on this [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] I say that if he has the rca('s) and power cables running next to each other and he takes them apart so they each go on one side of the car he'll still have this problem. This problem is "bad" grounding which can come out of several sides: 1. Bobine hood of battery charger (dynamo) 2. General (orginal) car grounding contains a lot of dirt 3. Amplifier generates the sound Cleaning grounds is always a good thing, but if i was you i would just drive to any audio store and let them test your system when a LT2 (caliber) filter is placed on the RCA port that connect to your rockford-400, the sound will probally be gone then. The LT2 filter is a "ground loop isolator" which will solve your troubled sounds but considering the equipment you got you probally dont want to go filtering, the bobine hood of the battery charger is most likely to be the real "bad sound" generator so you would have to check/replace that (bobine aint very pricey). The LT2 filter will "destroy" sub functions if you got a amp thats connected from a amp that lies after the LT2 filter. GL & peace Editted: Option 3 is not likely to occur on a rockford amplifier, i heard it once on a low-budget marquant amplifier which generated this sound, after putting in a PG at that place the sound was totally gone. [/QUOTE]

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