i have the xsite xs1555 woofer, 1000 rms and blitz bza2360 amp 1400 bridged. i want to design a new box with a port and i dont know about frequency crap, i dont know about that, i just wasnt a good sounding system. It cant be taller than 16" or wider than 36" or deeper than 24". its a 15" sub. What are some dimensions or box designs, pics or anything to help me know how to build a good box. i was also looking at fiberglass as an option though i have never worked with it before. thanks