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Message: <blockquote data-quote="BOOMINGRANDPA" data-source="post: 8640108" data-attributes="member: 671921"><p>yeah power cost less now but subs are less efficient so instead of running enitre system with 1 4 channel that does 75x4 each sub only getting 75rms (or 150 with 2nd amp) most subs are made to be ported now and you need 600rms min for most.. i ran over 900rms to a pioneer 3003 ported for 9 months no problems..  and because of whats called "box rise" sub really only sees maybe 50-60% of power the amp makes so some guys run say 3k rms to 2 8's etc..</p></blockquote><p></p>

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