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Yamaha RX-Z11 A/V Receiver:
Measurements
This graph shows that the RX-Z11’s left channel, from Multi input to speaker output with two channels driving 8-ohm loads, reaches 0.1% distortion at 214.8 watts and 1% distortion at 243.6 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 311.3 watts and 1% distortion at 387.4 watts. With five channels driven continuously into 8-ohm loads, the AVR reaches 0.1% distortion at 153.2 watts and 1% distortion at 183.1 watts. With seven channels driven continuously into 8-ohm loads, it reaches 0.1% distortion at 139.4 watts and 1% distortion at 160.4 watts. The RX-Z11 reached the manufacturer’s stated distortion of 0.04 % at 131.1 watts (5 channels driven into 8-ohm loads). This is fairly close to Yamaha's spec of 140Wpc x 7 into 8 ohms.
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