Okay, is it possible to have a bad 'unbalanced' connection on an amplifier and have a good 'balanced' connection? The reason I'm asking is I hooked the 990 back up to do some more trouble shooting. Here is what I did, I just hooked up 2-channel. I first hooked the left front up as it should be, left 'balanced' out to the left 'balanced' in on the amplifier. I then hooked the front right 'balanced' out of the pre/pro to the 'balanced' left surround in on the amplifier and then hooked the FR speaker wires into the SR speaker input and the SR channel, which did not work earlier today, worked just fine. Is it that I may just have a bad 'unbalaced' connection on the SR channel?