okay, let me just give a list of what I'm using and then go from there. Yamaha RX-V1000 receiver Yamaha carosel DVD player Klipsh: RF-3ii mains, KS-C1 center, quintets for rear. Room size: about 3000 cubic feet with 2 openings to other rooms in the house. Sub placement in rear left corner to the side of a cloth couch. I've recently added the SVS 16-46pc to the list and just yesterday, bought the Radio Shack slp meter. First I'll say that the SVS is a nicely built product and the guys were great with their timely responses to my questions. Second, it has some serious volume, no doubt. Running a scene from Disney's Dinasours where a dinasour comes out of the forest and chases another to it's death, I measured 112+ dB with the volume up pretty (make that extremely) loud, but still under the point of my amp clipping or any noticeable distortion. While not "boomy" sounding, the SVS is very smooth, maybe even smoother than I expected. I'm still wondering if I should have went with the 20-39pc or even 20-39cs with the Sampson. After reading so much about the THX intro to The Phantom Menace, I expected a little more of a "hit or concussion" feeling with the big 16-46, but really didn't get it. The rolling thunder prior and after the shattering sphere really, I mean really rumbles, but the shattering sphere really doesn't hit like I would think. It reminds me of how loud sporting events, such as drag cars or etc. are muted to a point so that it doesn't distort watching them on tv. It's almost as if the amp processes the sound and then says, "whoa Nelie, that's gonna hurt, lets turn the juice down for that sound." Is it possible that I'm reaching the limits of the plate amp before the speaker and so the additional sound just isn't there? A second question I have is that although I've calibrated the sub using the VE DVD, there is a significant drop in dB when checking the sound sweep found on any of the THX Audio Optimizer test. The sweep starts off with a fair amount registering, then about mid way down, goes real low before being picked back up by the sub and actually attaining a louder volume than at the beginning. What's wrong with this picture? Is it possible that the couch could be filtering out sound in either of the previous mentioned events? Also, I made this post public on this forum to share my experience with others and because my questions in no way are meant in a negative fashion toward SVS. I know they'll do what they can to help and I don't feel that anything is defective, just maybe not set up or placed as well as it should be. In the worst case, they have a 45-day trial period, so what more could you ask for? I'm just wondering for about the same money if I would have got a little more kick out of the 20-39 and a Sampson or 20-39+ ? Any comments are appreciated!