15" subwoofer 3.5ft3 @ 32hz (single sub)

[shredder1 10+ year member]

Merp

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[Jimi77 Premium Member]

I bet that gets down low.

 

[shredder1 10+ year member]

I bet that gets down low.

I'd predict a shallow roll-off below tuning with the smallish airspace. Yes. Modeling only shows +5db around tuning. Would anyone like a hi-20's/30hz small airspace ez build design posted?
Something like that should really dig with only output around tuning affected.