I just finished listening to Infrasonic Dreams by Bassotronics. I thought the 800's drivers and cabinet were coming unglued and I could localize the bass. Nope! It was my bathroom door moving to the beat. The 800 was rock solid - no extraneous sounds from the cabinet or drivers.

Although I had my Onk's volume at about 1 W/channel, the track still managed to make me feel a little sick and disoriented.

BTW, I have usable bass down to 10 Hz in my room. I suppose that makes sense given the longest dimension of my room is 30 feet.