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<blockquote data-quote="Buck" data-source="post: 8870099" data-attributes="member: 591582"><p>And I've done bigger woofers like 18's at 2-3kw+ in the smallest rear chamber I could use and rear port due to size constraints, and I've done as little as like 8-9 in^2/cube rear and it works, but that's tuned at mid 20 hz range, and those series 6th's didn't play much below tuning at all due to Xmax limitations from small airspace and small port surface area, but it played well from like 25 hz to into the 60's or so (it was a c pillar walll). Tuned at like 25/50 or something. But having like 9in^2/cube rear didn't cause port noise or anything like that due to it being inside of another ported box, not saying you can't ever get rear port noise, not sure. With 12's and that high power, usually more port area per cube ratio is needed across the board vs larger woofers. I've also done at least up to 14 in^2/cube rear with higher tuning and would've done 16 on some of space would've allowed, and that works out great, so it's just narrowing it down for the response you want, based on the consequences of different port and chamber stats.</p></blockquote><p></p>
[QUOTE="Buck, post: 8870099, member: 591582"] And I've done bigger woofers like 18's at 2-3kw+ in the smallest rear chamber I could use and rear port due to size constraints, and I've done as little as like 8-9 in^2/cube rear and it works, but that's tuned at mid 20 hz range, and those series 6th's didn't play much below tuning at all due to Xmax limitations from small airspace and small port surface area, but it played well from like 25 hz to into the 60's or so (it was a c pillar walll). Tuned at like 25/50 or something. But having like 9in^2/cube rear didn't cause port noise or anything like that due to it being inside of another ported box, not saying you can't ever get rear port noise, not sure. With 12's and that high power, usually more port area per cube ratio is needed across the board vs larger woofers. I've also done at least up to 14 in^2/cube rear with higher tuning and would've done 16 on some of space would've allowed, and that works out great, so it's just narrowing it down for the response you want, based on the consequences of different port and chamber stats. [/QUOTE]
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