I'm a full time Realtor and I have a family, so it happens quite a bit. That is why I had only done the (2) 15's so I could fit it all behind the rear seat. I was thinking of just doing (4) 15's to begin with. I guess if I am gonna use everything behind the second row I may as well do 4 of the 15's in a ported enclosure. That would probably be loud as hell