Originally Posted by ChopsZ

The 12W7 doesn't need a large enclosure per say as much as it needs one that's deep. The mounting depth of that 12" drivers is 9 inches! My Alpine 15" Type S is only 7 inches. It requires a max of 2 cf sealed vs the W7 that only needs 1.75 cf ported.

I'll probably actually be going larger than that and end up around 2.5 cf sealed when all said and done.