One of my amplifiers (crown 810) is distorting the sound alot. It sounds like the kind of distortion you might get when setting a compressor very high. Also, some days after it has been left on for about 5 hours it will make a loud pop, and this pop will increase in frequency to about one every 3 minutes. Does anybody know what would cause these symptoms? I'm going to open it and inspect the circuits tomorrow. I think it might be a capacitor.