Thanks, Daryl. It worked for me too. I think gonk was onto it with his advice to check speaker distances. Anyway RESET cured the problem.
I had the same problem with a new Panasonic DVD player that I tried yesterday. With that experience I suspected my optical cable and switched the audio input to coax. And of course that didn't fix anything. I was ready to send the 990 back to Outlaw.
This forum is invaluable. My wife had just about had it with my whining.
Thanks to all. John