headbussaboi 10+ year member
CarAudio.com Elite
No they're not. Everyone told me that too but I went ahead and built 2 fiberglass boxes, one on each side of the trunk in my old BMW. The subs were facing directly at each other and about 2 feet apart. I swear with the back down, you can start to feel the pressure blow by the headrest. It's like a mini blowthru. Flame away, but I'm one who had an install like this:.bad bad bad bad, then they are just fighting againse eachother