If you're looking for clean, high output bass in your mid-sized to large room (and who isn't?), this is the perfect powered subwoofer for you. Its massive dual 10" drivers pound with nearly 50% more surface area than a single 12" driver. The PSW650 delivers all the power and gut-rumble you expect from a home theater sub, and is also fully capable of conveying all the depth and musicality of a plucked string bass.

"The PSW650 is flat-out the most impressive subwoofer I've ever auditioned, whether for home theater or music. It's so powerful in its reproduction of bottom-end special effects, it could probably stun a terrier at 10 yards, yet it's capable of producing tight, tuneful music when Paul Chambers walks his acoustic bass behind a Coltrane solo."
OnHomeTheater.Com, February 2002

We are moving and ufortunately this beauty will not fit with the design of our new place, otherwise I would be keeping it. I bought the sub in the US and had a purpose-built transformer made for it. Apart from the mark shown in the first photo the piano black finish is faultless.

http://www.polkaudio.com/homeaudio/products/recent/psw650/