Each of the six channels of the Marantz AMP 30 power amplifier outputs 200 watts when operating on a load with a nominal resistance of 8 ohms, and for a load of 4 ohms, the power doubles to 400 watts. But the most important thing is not the numbers, but how this power feels. There is no tension or aggression in the AMP 30's sound. There is plenty of power, the dynamics feel natural, and everything is conveyed with that calm confidence that distinguishes good amplification from excellent.