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Message: <blockquote data-quote="sjuddslvrss" data-source="post: 8016411" data-attributes="member: 647862"><p>All the subs in my poll run between 600-800 rms. The apsm-1500 puts out 600 @ 4 ohm and the apsm-2000 puts out 900 @ 4 ohm. I think I've got the power matching thing down but I don't know much about resistance and how it effects sound quality. I'm trying to learn the more complicated aspects of car audio, like what xmax ratings of subs mean. I mean I know they have something to do with excursion but for instance the PSI Platform 1 says it has an xmax of 52mm. That seems much higher than any of the other subs I've been looking at. Why is that?</p></blockquote><p></p>

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