Subs in back panel, Heard about it but can it be dun Options

[urbandork]

I heard once that subs can possibly be fitted in the back where the 6.5's or whatever go.

I was thinking of a fiber glass incloser with the a sub on each side. I figured it would go well with my rmb8's in the front and maybe new 4"s speakers in the front. (yes i have an 8 speaker set up)

I dont want to run a box for room issues and figued it would be a fun project if it can be dun.

[urbandork]

Coomer i direct this question toward you because uve actually seen the area in question.

I was thinking in stead of fiber glass can i just seal the area behind the pannel with that bed liner stuff for trucks. Its air/water tight and can be laid down easily. I plan on sealing off any seams or cracks with that foam stuff, shaving the foam down for smother curves (for looks) and then painting on that bed liner stuff.