I have run into another issue. I did an a/b comparison of analog versus optical in with my CD player. Huge difference in sound; the bass output was way to high (10db+) in analog. I also recorded from a cd to reel to reel and did a comparison of CD/Optical in to Reel to reel and had the same difference (can't tell if the signal is recorded with increased bass or if it is coming from 990). Thinking that prehaps I am hearing the difference between the CD players 15 year old DAC's and the 990, I hooked up my relatively new Denon via analog and I have the same difference in sound. Any ideas?