I heard the 850 today and WOW WEEEEEEEEEEEEE This thing is simply awesome. In the past couple of weeks I've heard the PV1, ASW750 and the DD-18, but nothing, and I mean nothing prepared me for the 850. This thing just blows everything I've heard out of the water. I listened to this beast in London, in a room of about 10x30, with the position on the amp set to about 9'O' clock and the volume on the amp at about -10 - in other words the set up was for the 850 to take a leisurely stroll. However the 850 had other ideas and I kid you not, the thing nearly brought the building down. We started with LOTR when gollum and crew are heading through the marshes and the wraith on the dragon flies past. Each flap of those wings engulfed me, my nephew and the manager of the shop in waves of bass that felt like being punched by an overgrown and p*****d off sumo wrestler. Incredible Another favourite of mine is when Saron explodes and the energy field flattens everybody to the ground. Now when I've watched that scene before I know what is meant to happen in terms of bass. As the wave passes over the battelefield your'e meant to feel it. Up till now, my eyes have told me what I should be feeling, BUT today I also felt what was happening. That wave left us punch drunk and the whole building wobbled (really). When I watched the same scenes on the DD-18 it was good, but it didn't leave me reaching for the asprins - but the 850 did. To quote the manager "I didn't know LOTR had so much bass in it" (and this is from a man that stocks and plays the 750, infact he had one in the corner of the room) Moving on to music was a real revelation as well. I've never known a sub to shake a building so much. We played all sorts R&B, Classical a bit of Jazz and organ music. It was so good, we had other customers coming in for a listen!!! I could write tons more, but to suffice to say I have found the HOLY GRAIL of subs. No wonder Hi-Fi news said it caused a sense of unease amongst it listeners. When this thing gets going it dosen't just cause your trousers to flap it moves the whole dammed sofa!!! In conclusion, all I can say this thing would satisfy the most demanding bass-holic and would stop any desire to upgrade dead in its track. And thats what I want. No more wishing, longing, desiring. Nirvana has arrived. Go find it at your nearest B&W dealer.