My brother got his pc+ on Monday. 20-39PC+ His system is a H/K avr8000 Axiom m80. vp150, qs8 Fronts large and all other small crossed at 60hz Now we used the Sound and Vision calibration disc and all speakers are set up at 85db (volume at 0) with the SVS 3-4db hot using and radioshack db meter. Now on the THX intro, specificall the one that has the thunder and lightning effects, the sub bottoms out. Now if I turn the voulume to -6 it doesn't bottom out anymore. We usually listen at -10 which is equivallent to setting speakers at 75db. My concern is whether or not its ok for the sub to bottom out once in a while. Also, does anyone else have their sub bottoming out? I used the THX intro as a reference and tried to adjust the sub level by ear. NOw with the volume at 0 (85DB speaker levels), I kept playing the intro over and over while adjusting the gain on the sub. I turned it down so that it wouldn't bottom on the intro only later to find out that the bass was way to low during the movies. SO I went back to the original adjustment using the S&V disc with the sub 3-4db hot. Like I said we usually listen at the 75 db reference level and the sub doesn't bottom out as much. But to those people who listen at 85db, does your SVS bottom out? THe SVS is a great sub and it pounds and sounds excellent. But the bottoming out of the sub concerns me, I wouldn't want to damage it in any way. I guess it won't be to much of a concern listening at a 75db reference level, it sounded way to loud at 85 db anyway and I wouldn't want to go deaf. We do love to show it off though, just don't want to bottom it out during the process and possibly damage it which would really be embarrassing and stupid! Good Job SVS crew on the sub!