I've calibrated my HT system using Sound & Visions test DVD and a Rat Shack SPL.. (Just an aside, Radio Shack in Canada is now known as "The Source" ) So my system is all calibrated up and I put in XXX and everything is rattling down thats not bolted down. Pretty cool I think to myslef. Last night, I brought home Harry Potter "Chamber of Secrets " speciall DVD set for $12.00 Cdn and found myself truning up the bass on the sub. I know not all DVDs are recorded the same, espcially with bass. Just wondering how many of you adjust their subs even after calibration to suit your tastes?