Hello, Last night I was listening to some music and I soon noticed that I was only getting bass out of my speakers. The highs were incredibly low. I tried all of the other sources (tape, cd, tuner, etc.) same problem. I know its not the speakers, because no sound is coming out of any tweeter. I just have the 2803 with 2 Infinity IL10 bookshels and a JBL powered sub. My only thought is that something inside the receiver got overheated and burned out. The receiver is just about 5 months old, so I dont understand how this would happen so soon. Thanks in advance.