I got out my tape measure this afternoon and my Cobalt's tiny trunk filled me with gloom. The opening is tiny. Any decent sized cab would have to go into the trunk through the back seat, and the max height I can pass through that aperture is optimistically 14". Then I found a Bag End S15 knockoff and a 15-watt bulb began to dully glow over my dense head. Maybe I could load 2 of these with the Faital Pro 15PR400? They'd easily fit through the trunk opening. But I'm still left wondering if they'd sound and work OK, and whether I could tune the cabs properly for the speaker by cutting the port tubing (the cabs come with a hole dead center in the back with a 4" dia pipe that's 3" long stuffed in the hole).