AV Receivers

This graph shows that the SC-05's left channel, from Multi input to speaker output with two channels driving 8-ohm loads continuously at 1 kHz, reaches 0.1% distortion at 168.1 watts and 1% distortion at 197.2 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 249.6 watts and 1% distortion at 338.4 watts.

With five channels driven continuously into 8-ohm loads (blue curve), the amp reaches 0.1% distortion at 119.7 watts and 1% distortion at 153.9 watts. With seven channels driven continuously into 8-ohm loads (green curve), the amp reaches 0.1% distortion at 137.8 watts and 1% distortion at 149.0 watts. It's odd that the power output at 0.1% distortion with five channels driven is less than with seven channels driven, but that is indeed the case with this AVR. The test was performed several times to verify this result.

The manufacturer's stated distortion of 0.09 % was reached at 135.3 watts with seven channels driven into 8-ohm loads. This corresponds almost exactly with the specified power output.