I just wanted to post here on the Yamaha board about how I am continually impressed by my old Yamaha DSP a2070. The sound is crystal clear; every speaker that I try with this unit is improved by it!! The DSP programs are fun to play with; right now I am into listening to classical music as background sound 24 hours a day in my work/bedroom area. The Church/Freiburg mode is interesting. I run it in two-channel mode often also. I think it is listed as 80 watts, which has baffled my more watts is better viewpoint on equipment. Anyway, my interest is up, I am sold on Yamaha!
I do use a extra fan on all my amps/AVR etc. and made sure the units have air space above them (no stacking ) the more power the amps make the more heat.