At 4x55W (RMS) this Amp provides just a little more umph than the very common 50W competition in this price range. Construction is solid. No distortion at a volume that is too loud for the average listener. The manual states that this Amp is rated for 80W per channel at 2 ohms (RMS). I was quite impressed that the manual included the factory technician's hand written value of the actual performance for my specific unit. (92W) Paired with my new 12" powered subwoofer I find myself looking for excuses to run a few errands. Only criticism is that it did not have any pre-outs.