Summary: I have a 15 x 25 room with cathedral ceilings ( 20 ft high) and this sub is more than enough!!! This sub absolutely rocks!!! I use the energy speakers with the Yamaha rx-v473 receiver. I have only turned this thing up to 60 (it goes up to 80) and it shakes my windows!!!!!
Summary: Just bought this thing after having given it a lot of thought. Why? Because I have this beast in my corporate office under my desk, that's why. Yes, I work on weekends and after hours, so I can let my hair down with this thing. The clincher is the remote control for the volume and the presets. Not many other subs in this range have it. In general, it has way more potential than what I use it for, but it does the trick.
Summary: I picked one of these up at a local retailer and all I can say is wow. I've always been a serious audiophile on a limited budget and after hearing this sub I had to lay down the extra money. I'm currently running all paradigms and had a DSP3200 complementing them. That in itself was a great sub. I was able to run this sub side by side with my 3200 and could not believe the difference. If you are serious about audio this is a great sub to have.