EFSIII,
Right now, my mains are KEF 104.2 and KEF Center. I think Rears are PSB? My listening area is 21x21x9 that is open (no wall) on the rear and add about another 20ft. I swapped out my Velodyne F1200 for the 20-39PC+ and it was about double the intensity of the slam,bang,pop,etc., My couch, which is about 12 ft. from 20-39 started to shake and my pants leg moved! NO EXAGGERATION. But while calib. it with AVIA- doing Low Freq. Sweep, it just stopped working. However, their Great customer service is taking care of that. So, while it worked, It was unbelievable with the 950. I don't think I, or my room, could take (2) of them!! P.S. This was with the 950 sub channelout at -3db and the 20-39 set at only 3/4 volume. Hope this helps
DmC