What is the best subwoofer you have ever heard?


What is the best 'cost no object' subwoofer you have ever heard for home theater with regard to depth, power, punch (ability to pressurize a room) and accuracy?
matjet
I listen to music with my REL Britania series NOT helicopters and explosions, so my views are reflective of my 2 channel audio exp. The REL studio series are not good musical subs.They are meant for HT. I like a sub that has the woofer facing you for best musical sound. Not one thats pointed at the floor.
And IF any one post that SUBS are meant to be felt not heard is full of %$#@! because you have never heard a great sub then.
IBo1972

I am talking about use for home theater, not music. I am looking for a sub that has impressive visceral power and punch. Also, a sub that is fast, detailed, low and accurate. A sub that can pressurize a room without distortion. A sub that can be felt in the chest, not just the feet when planted on the floor. I am looking for substantial power as well as accuracy.

I am considering Paradigm Signature Sub 2. Would any owners like to comment on this product?
Mat, I've never heard the Paradigm but considering your needs I doubt it will fail to impress.

IMO, a good subwoofer can do both HT and two channel very well. To accomplish this with sensible connivence the sub needs some form of modern signal processing with presets that can be switched via a processor, pre/pro, receiver, or subwoofers, remote.

Even if its a dedicated HT or a two channel system the media usually needs its varying share of EQ such as phase or gain. The more control you have over your sub at the listening chair the more you'll realize just how important a sub can be.
If you have an older surr amp, go for sub including eq system. Audyssey Pro with my own way of measurement gave the best integartion of a sub in stereo as well in Multi channel use I ever heard!