Gonk,

I was surprised by it myself. At first I thought something was wrong with my new 990 then as soon as I stopped the upsample mode and went back to stereo mode, the sound came back. And only in stereo headphone mode and none of the Dolby Headphone modes were affected by the upsample mode. Good thing I called Outlaw's Tech Support to confirm my findings. The 990 is definitely not going back! It is here to stay!