2 12 vs 1 15

well for one those l7's are in a small azz box barely above the min required so yea i would either go bigger sealed or ported

ported you are gonna need around 5cuft net, and selaed i would do around 3.5-4cuft, might be off on the sealed but ported is about right for l7's

 
thats only 3.35 before any displacement deff cant go ported for those subs or much less even one 15 l7 i dont think that will be enough

if u do aeroport on the box after that and the sub displacement u will have less than 3cuft so i would do the l7's sealed you would have around 3.2net or so which would be good for those

l7's sealed

that or go with a 15" that doesnt need much airspace or find a high powered 12" like a xxx or something that can take 2k plus and use every bit of that zx2500

 
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