What can I say, I'm ear to ear grins. It can rattle things just about everywhere in the house. Makes a lot of my favorite movies an entirely different experience. To my ear the bass is tight, defined and clean. Mind you I haven't hear that many subs. Of the subs I've heard I like this one the best. I believe I'm missing some of the potential of the sub since the room I currently have it in is a poor shape and the only place it can go in this room isn't helping matters (neither are the rattling fluorescent light fixtures).

In comparison to a set of Senhiesser HD600 headphones I have, the bass isn't anywhere near as defined or clear (those phones are simply incredible). Mind you all you can do with the bass from the headphones is hear it, the sub you can feel. In comparison to the PDR10 I had previously. Slightly cleaner and can go a whole bunch deeper and louder. I borrowed a CD with 100hz to 20hz in 10hz increment sine wave test tones a while ago. The PDR10 did ok on the 40hz, attenuated on the 30hz and was silent on the 20hz. My new Sonosub belted out the 40hz and the 30hz. Then I could hardly hear the 20hz, but ceiling tiles where jumping and things were shaking :)

I won't comment any more on its sound until I get it back to my house where I'm going to school (I'm back at my parents place for the summer, couldn't find a decent job where I was going to school). Hopefully I'll get the chance to compare it to a SVS20-39CS and a Servo15, a pair of each, and all 4 at that point too (if Trevor is willing and it can be arranged).