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Message: <blockquote data-quote="T.I.K." data-source="post: 7256157" data-attributes="member: 626887">Give us some dimensions, we could let you know real quick.two 12" subs has less cone area than a single 18" if you just do simple circle area formula, you will find that two 12's have 226.2in^2 or surface area, while a single 18" has 254.47in^2 of surface area.  Making a single 18" a better option that two twelves on every level except for space saving, maybe.Two 15's have considerably more cone area than a single 18" with virtually the same box size, so if you have the room and the money, I'd get some good 15" subs that take 1k RMS, and feed them 1200 a piece, although with impedance rise and a less that 14.4v electrical system, they'll probably end up seeing ~1000w</blockquote>

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