Dilemma - XXX15 vs XXX18

i just threw a 15xxx in a 3.8cu box at 33hz in my grand prix gtp and i can tell you it slams...the 18 is a monster, but why keep a monster sealed when you can unleash a smaller monster to its full abilities...my xxx15 was in a 2cu box prior to that and the difference was unbelievable,,,like another sub almost...just my opinion, the 15 ported would be what your looking for

edit: after disp....the box is 3.8.....it was around 6.25 before displacement

 
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MisterGrubbs

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