Moon by Simaudio 641 Stereo Integrated AmplifierThe Moon 641 is Simaudio's entry into the North Collection a range of components that represents what the company calls its most ambitious statement in performance per dollar engineering. At 175 watts per channel into 8 ohms (350 into 4 ohms), the 641 has output reserves that few integrated amplifiers at any price can match, but the headline spec understates what makes this amplifier compelling: it's the character of those watts that matters. The