Should i do this... (car audio/video question)

[Don Jacob]

okay for those of you who don't know i drive a 96' mustang GT Convertible so far i've put off putting in a soundsystem because first i didn't know much about them, then after i got some knowledge, i wanted to wait until i had enough money to buy what i wanted, when i got enough money to buy what i wanted , i wanted something else after seeing "pimp my ride" on TV and this one system i saw in a mustang magazine.
 

since mustang convertables have small backseats, i wanted to take out the back seats and put 2 15 inch subs with a custom box (fiberglass) where the sitting part of the seat was at  and my amps where the back rests were and put a cool ass monitor in the middle (maybe). then have lights in the fiber glass that light up when the bass hits.  cool right? well i was telling my homie at work about this and he said, that it'd look cool but sound bad because since i had  a convertable the bass wouldn't have good Resonance/sustain , it'd only work if i had a hard top.  But i'm looking at all these custom systems on the net and some of them are similar to what i want to do and convertables......my question here is would my shit sound bad if i did this??

[Primo]

I am not sure because I have never done anything in a convertable. But I did the same exact thing in my friends mustang and it sounds tight. I would think it would sound the same as it would if you had subs pointing out of the trunk.since its a custom fit it willl be molded to the car and that should be enough to shake the shit out of it.

[Don Jacob]

thanks

[Da WCC Hopar!]

ya man go for it