Has anybody found a good box for 2-12's that will fit under the rear seat. All I have seen are for 2-8's or 2-10's, and a few for a single 12. I know that's really not enough air space for 2-12's but I've already got a couple of solobaric's so I might as well use them.

 

Do you know what the secret to Bass is?
SPACE ! ! !
Space is the very Top number One Factor to Good Bass
Big Space equals Big Bass and Small Space equals Small Space: and that is just plain Scientific Truth and absolutely No-Way around it
Not even unlimited amounts of Money can make up for the lack of Space
This information is to Help not discourage; use this information to save you time and money on bad designs and junk that just doesn’t work
The space issue has Two elements;
The first being the subwoofer enclosure (Box) size or air space volume
This has become confusing issue; speaker manufactures are using minimum (Small) required air space volumes as Marketing tools. Almost all the speaker brands want to CLAIM there speakers work in the smallest size box. The definition of WORKS is a gray area for theses speaker companies. Speaker designs have improved over the years however no one has reinvented the basic Subwoofer speaker we are working with the same fundamental type speaker since 1958.
What dose this mean; A large subwoofer (like a 12”) Stuffed, Jammed, Crammed in to a small speaker box Dose NOT WORK
Smaller and/or Fewer Subwoofers in the right size speaker box will Out-Perform and Sound Better than Larger and/or More Subwoofers in the wrong size speaker box PERIOD you can not change the present Science