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Message: <blockquote data-quote="noonej21" data-source="post: 2506259" data-attributes="member: 563225"><p>The "pop" was a lot louder when I turned the car off or when I would use some of my decks functions(track skipping, source selection...) than it was when I would first turn the car on. The odd thing is that I switched out my amp with anther PPI that I have. PPI PC1400 and there was nothing. Granted this amp was not being stressed nearly as much as the other one, this amp is one of the few older PPI's that are stable to down to 2 ohms where as my current sub amp can only go down to 4 ohms. That was why I questioned the ground with the 2150 I was giving the sub 600 watts at 4 ohms where as the 1400 was giving the sub 400 watts at 4 ohms.</p></blockquote><p></p>

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