OK my friend hooked up 3-10 inch VISONIK SUBS(yea they suck) BUT when he had them in 3 different boxes they sounded NICE!! but when he put it in a 3 cubic feet box (all three subs in one box) it sounded crappy!! the amp is a 340 watt (175 rms) and (85 rms in two channels)and i was wondoring if he changes the politiy would it sound better(like put - in + and + in -)??