I wouldn't mind put a pair of 12" behind the seats, but the sub I want (Tempest only comes in 15") required a lot of airspace. A minimum of 2 cubic feet, I want to put 4-5 cubes to 1 sub, and hoping to fit 2 subs in. (Also, the tempest is a SQ sub that hits hard that why I want it.) Thats why I was wondering if putting the subs in the front would sound ok. Cause in the trunk it's behind the engine a lot of the music will be overpowered by the engine. Or a Brahma which required less cubic feet, but costs a lot more.