Calibrating my sub-level using the Avia disc to 75 db (actually this makes the sub at 85db) to match the left channel, leaves me wanting more, from my sub (PDR-10) when I am listening to a DVD. Anyone else experience this? I understand Avia's reasoning for not allowing an LFE calibration, but with my sub calibrated to 75db level, it seems to be lacking. My room is quite large. It is 42'x15'. I have the sub level considerably higher than the 75db that would match my front left speaker. I get nice rumble and percussion as opposed to an average.....Wooompf, when it is set to 75 db.