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In addition to the power you’ll need to fill average-sized rooms with theater-quality sound (125 watts continuous from each of its seven amplifiers), other performance parameters like signal-to-noise and distortion are absolutely first class. Then there are the Marantz touches. A toroidal-based power supply. Current feedback amplification. An anti-interference copper plated chassis that’s less than 16” deep so it will fit in more places easily.