O.k., I have had the 990 for about 1 yr. and have discovered that randomly the 990 will cut the front right channel by about 4 db. I have switched the speakers, left to right and have switched the amp from left to right and have discovered that the 990 is the problem! I have had the 970 and upgraded to the 990 in hopes to eleviate any issues and here I am again. What do I do with this, am I missing something? Extremely frustrated, Brian