your not going to get what you want for only 1500 unless its bottom end gear and covered glass enclosure.

just a small break down for OK gear at best. No model numbers cause I'm at work and the computer suck.

4 250wrms subs ~ 75ea $300
1 1000wrms amp $250
1 4ch amp ~75x4 $200
1 2 amp 4awg install kit $60

total for gear $810

that only leaves 690 for the box and complete install.