This is a really fine amplifier, from HARMAN/KARDON at it's best. It's conservatively rated at 40 watts per channel. The dual mono design, with twin power supplies gives it incredible punch, and the wide bandwidth contributes beautiful delicacy and detail. I was driving the JBL 4312Bs last night, playing Black Uhuru And LKJ, and this amp rocks.
The owner's manual is here.