Hello all... bear with me... I'm a rook... Last Friday, my new SVS 20-39PCi sub came. I calibrated it with DVE to about 83db (this seems to be the standard recommendation for those that like the bass a bit hot). The gain/volume knob on the sub itself is at 1/3. My mains/center (Fluance AV-HTB set) are all set to SMALL. Reference level on the volume control on my Yamaha HTR-5660 reads -18.5db. So far the loudest I've had things jacked has been with Attack of the Clones... -27db on the receiver. As promised (by virtually every SVS owner on these boards), the entire house tends to vibrate now. I'm a bit worried I'm shaking nails loose and compromising structural integrity. *L* I'm the curious sort... and I want to turn that volume knob even higher... and see what the "cannon in the corner" is truly capable of (house falling apart be damned). BUT-- I'm also the paranoid sort... I don't want to bottom out and possibly damage my new toy. How hard can I safely push it? Again, it's an SVS 20-39PCi. Thanks!