I know this has been covered many times but how do i mod the sub? I mean i take off the sub? do i detach it from its cabling or what? Also what sides do i line? I have sheet polyfill here and i believe its 1/4 thick. Is this the right stuff? Anyway, people say they stuff it in there while others line the walls. I mean do they literally stuff it in thereso it loose and what not If anyone could give me the run down, it would be greatly appriciated. Lastly, how much of a differene will i notice because ive been trying to calibrate it with my VR-507 reciever but cant figure out how to adjust the lfe level and cut-off frequecy level. On my sub, i have the settings right now on the cut-off knob all the way up (200hz i believe) and the base level knob around 1-2 o clock. The sub is on my sub pre out with a sub cable (arrow on cable pointing towards sub). The setting is -1 or 02 on my receiver.