I've noticed an interesting phenomenon in my Denon receiver. Often when I play a source (be it a video game, a VHS tape, or a DVD), the bass will be more noticeable in a 2-channel or "direct" decoding mode than in a Dolby Surround or Pro-logic IIx mode. Why is this? To hear the same level of bass in Dolby Digital or Pro-logic as in stereo mode, I have to turn the bass on my sub up. Is the more subdued bass in these more elaborate surround modes just part of the circuitry and the differently decoded signals? Is there any function on my Denon AVR-1706 receiver that can stabalize the bass for all surround modes? Thanks!