Just got a new black SVS PB2-Ultra sub yesterday afternoon. It will be replacing my trusty old Velodyne HGS-18 sub. The HGS-18 wasn't lacking in low end, but it was little bloated sounding to me at times. I knew the PB2U was going to be bigger than the HGS-18, but until you get this beast of a box in your house, you don't really realize the magnitude of how really big the sub is. Needless to say, my wife was not too happy it! I haven't had time to calibrate the sub, that'll have to wait for a future weekend when I have some free time. I did get it put into the room, and here's some pictures of the sub. Here's my Velodyne HGS-18 next to the PB2-Ultra. It's sitting next to it just for comparison pictures. I've already sent it off to it's new owner.