Before I knew anything at all about HT, I bought a Klipsch KSW12 subwoofer (I would probably buy a different make and model now). Since I won't be upgrading to a new sub anytime soon, I'm trying to make do with what I have, but I'm not very happy with it. On some discs, when there is a particularly loud explosion (I'm thinking in particular of Apocolypse Now Redux) the bass sounds a little distorted and "scratchy." I have the volume level turned down on the sub itself and up on the sub out for the receiver, to minimize outside noise interference. The sub is downward firing, mounted on furniture spikes, and sits on a ceramic tile. Any tips on how to get clearer sound from my sub? What, for instance, does putting it in a corner do, exactly? I know it is supposed to increase the volume of the sub, but I don't really have a volume problem, its more of a clarity problem ... If you put a sub in a corner, how close to the walls is ideal? Three inches? Two inches? Does putting it in a corner muddy the sound? Any advice on tweaking my sub would be greatly appreciated.