I was trying out the DSP modes on my Denon 2805 yestreday, and I must say the sound level difference between "Virtual" vs. "Pure Direct" was crazy. The Virtual set up (2CH.) was way louder with alot more bass. I like to listen to music in Pure Direct mode but to get to good listening level I had to turn it up about a good 8-10db louder than that of the Virtual mode. Can anyone tell me why that is? THANKS!