avr volume levels

[stevedave1138]

I've posted before regarding my issues with my Pioneer AVR VSX-816.

I have another issue, with volume levels.
When watching TV, these is a massive volume difference between audio on SD channels (a decent volume is about -45db) but when you switch to an HD channel, it is almost like it is muted,and I must turn it to approx -30db to -20db to get the same level. Even then, I find the HD channels,while mostly in 5.1, don't sound quite right. Just like when you have a TV's volume turned down too low,but crank up some external speakers,it's louder,but not right...Anyone catch my meaning? Its also a nuisance,as the AVR is slow on volume changes via remote,not to mention how it sounds when you change back to SD programming at -20db's!!!!

DCT is Motorola DCT-6200, connected via digital coax. Have looked through the AVR manual,but didn't see where I can change levels to accomodate this? Any advice?

Pioneer VSX-816
speakers are BOSE 201 FL and FR, Paradigm Cinema 90 for SBL and SBR, and SL and SR, Pardaign 10"sub and Paradigm CC.

Thanks