I've just bought a new speaker system (M&Ks) and am really pleased with it. Spent some time positioning all the speakers, measuring the sound, fiddling around with the interconnects and sound levels. Just generally getting them to sound as good as I can. The one area that I'm a bit baffled is with the sub. It's an M&K V851 and it sure as hell shakes the room. The overall effect is excellent. But I'm just not sure what I'm looking for in trying to get the sub to sound it's very best. I'm not particularly techinally minded but am just after some idea as to what I should be looking to hear (or feel)?