Summer build, need help on decisions.

[djtomczak 5]

So a friend decided to go ahead and buy the same sub I have. With me being the loudest in the area he is now the loudest since his is in a hatchback while mine is in an SUV. My question is what upgrade should I go for? With 40 inches wide and 25 deep for the top, 6 12s would be difficult to fit unless I angled the top baffle. I also couldn't do more than three 15s unless, again, the top is angled. A second 18 would be doable but I want opinions on which would sound louder.

The plan is a wall behind the C pillar, behind the second row. It's all just planning now, however.

[ssh 924]

Whose dick is bigger?

A wall behind the c-pillar sounds sorta pointless to me, as the idea is to minimize volume that needs to be pressurized. Putting it so far back likely wouldn't have much gain compared to a traditional install.

[Impious 1,476]

Whose dick is bigger?

Apparently not his, atleast not anymore.

[bassahaulic 155]

Don't do a C-Pillar wall unless your doing stupid amounts of cone and are doing a bandpass.