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Message: <blockquote data-quote="HCCA" data-source="post: 2745342" data-attributes="member: 571196"><p>A car's engine displacement is determined by both the bore AND the stroke. A 327 Chevy, and  a 350 Chevy have the SAME bore, but...the 350 has a longer stroke. The displacement of a woofer is no different. The average 12" sub's displacement is limited by stroke. The Boston SPG555 has 3.75" of stroke. That's nealy four times the average stroke of a 12" sub, AND it fits in a 1 cft sealed box!! It takes 1000 watts continuous, and sounds AWESOME! You want some serius output? Use two of them in place of two 15's. They will fit in 2 cft of sealed space, and will weigh 52 lbs for two of them without the enclosure!!</p></blockquote><p></p>

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