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Marantz AV8003 Preamp/Processor and MM8003 Multichannel Power Amplifier:
Measurements
This graph shows that the MM8003’s left amplifier channel, with two channels driving 8-ohm loads at 1kHz, reached 0.1% distortion at 174.8 watts and 1% distortion at 192.5 watts. Into 4 ohms, the amplifier reached 0.1% distortion at 248.0 watts and 1% distortion at 289.1 watts. With five channels driven continuously into 8-ohm loads, the amp reached 0.1% distortion at 127.1 watts and 1% distortion at 150.1 watts. With eight channels driven continuously into 8-ohm loads, the amp reached 0.1% distortion at 109.7 watts and 1% distortion at 122.3 watts. Under these conditions, the manufacturer’s stated distortion of 0.08 % was reached at 108.6 watts, which is considerably less than the 140Wpc specified by Marantz.
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