i own the dr7 pre amp..and was lucky to find two dr3 amps/25 watts class A(wich i run in stereo//80 lbs each).i measured there output @~ 40 watts rms(probably not pure class A)+pulling about 2.8 amps each .(there great in the winter/i don't need to turn the heat on)the headroom is~8 which is hard to find in any amp.i was told they were designed to compete with a certain mark levinson amp.they also made a dr3vhs which is the 40 watt version(monster@120lbs)..it's tough to find a better amps for the price..