So the display flashes High Heat with the fans running and automatically lowers my volume from just moderate listening levels. What's strange is that it only happens with my cable box connected to my AVR and not with anything else. Whats even stranger is that In just experimenting with settings, when I raised my crossover from 80hz to 100hz, it solved the problem. Why just with the cable box(Verizon FIOS) does this happen??