Proud owner of a pb-10. I know this thing cranks but I just wanted to post my in-room spl results @1m These are all "corrected" measurements using an RS analog spl meter. This meter is pretty "nifty" eh? 25Hz 114.3db 22Hz 111.8db 20Hz 110.2db 19Hz 107.5db 18Hz 101.2db I thought it was pointless to post higher freq's because I'm sure that there are many comparable subs that can perform similarly at 25Hz and above into the 105-110db range. I pushed the sub fairly hard and close to the point of compression/doubling and backed off a tad on the volume when I reached that point. I did notice that the port chuffing was intense at 24Hz and below, I measured with the grill off as I felt as if the cloth and the port were "fighting" eachother and created more audible chuffing than with it off. That grill couldn't get out of the way fast enough! Great product SVS makes...I felt like I was back in highschool, watching quarters bouncing off the tops of "mini-trucks" I also felt as if I needed M O R E upgrade-itis already?