Is there any way for me to fit four 12"s and one 15" sub in my little protege and have it sound good?

 

That's f-in nuts

 

you could face the four 12s backwards at an angle on the sides. and then put the 15 in the middle facing forwards. youd have to do extensive fiberglass work to make the box tho. i fit two 12s in the back corners using fg and i still have a lot of room to work with. but if the rest of your system isnt up to par, its going to be waaayyyyyy too much bass, imo.

 

man dat would be a nasty(crazy) setup...LOL I jus have one sub 12" and it sounds nice to me.....but 4 12s and one 15.... w0wLOL...

 

i had a 15 in the middle with a 12 on each side then two 10's behind my seats and two 6X9's besides the 10's so its possible