Well, I went and bought the Sony sub at Best Buy because I figured I'd have consumer guilt if I bought it but I'd feel even worse if I passed up that price. Anyway, yes, I've read that amazing AVIA explanation that is now on the second page, and it is informative though not really anything I didn't already know, but it didn't really give me any idea of HOW I'm supposed to calibrate this subwoofer. I'm using AVIA by the way. Right now Subwoofer = YES, and everything else is set to small. I have speaker distance and levels set as well. The Sony sub has a phase switch, a crossover dial and a level dial. Picking the phase will be easy enough and I know I need to have the crossover all the way over to 170Hz, but it's the level dial I'm confused about. The Onkyo has a separate speaker level setting for the subwoofer once you set it to yes, and I assume that is for the LFE. I just don't know if I should be adjusting that or adjusting the physical level dial on the subwoofer?! Also, the SPL readings are very sporadic on the subwoofer. In AVIA I was using the subwoofer setup test tones that first give you a tone on one of the main channels (to note its SPL level I guess) and then follows that immediately with a bass tone. The bass tone wiggles wildly and I'm not even sure if this is where I should be reading the SPL from that anyway. Should the channel speaker tone (before the bass tone) in this setup menu be at 85db? Because my speakers are calibrated to 85db through the main speaker setup, but these tones in the subwoofer setup don't give the same 85db out of the main speakers. I'm rambling, I'm just completely confused of how I should be using AVIA and the Onkyo subwoofer dB level adjust and the physical level dial on the subwoofer in order to my bass management!!! Help??