Ok fellas i am either running 2 12" Fusion Power Plants or 2 12" Cerwin Vega Vmax's! depends on a few things so I am going to build my box for each sub so the volume is right around 1.75cuft! is that to big for the CV? will they sound like crap? And what should I run the hz at so it is LOUD but still hits that low bass HARD! And it said to line the box in fiberglass?? so do i just buy fiberglass and lay it on every side of the box?