Hi squawken,
For what ever reason, I went bach into speaker set up. I switched from "small to large" then back to small. It helped, why, I have no idea.I am still not able to get as much bass as with the cd's dacs, but the 990's have more punch, not as colored.
With " Bypass, Upsampling, 7 channel, 5 channel or any of the other surround modes, theres little difference.