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.
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.