A8 arrived today.
Just ran a power sweep and 68W x 2 into 8 ohm at 1% THD+N is a dead on spec as-is the 280 mV input sensitivity with the volume knob at max position which is an astounding 38 dB of gain. 1 kHz power sweep shown below in to an 8 ohm dummy loads with both channels driven and volume knob at max. Don't take the lower level THD+N readings as accurate as I am using a MOTU M4 as an input / output device which will have it's own noise / distortion in the mix.
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It also does not seem to like any input above 1.6 V which is disappointing because it limits how much you can turn the volume knob down for improved noise performance. Here is a sweep at about 24 dB of gain which results in ~70 W with 1.6 V input. Note the improved noise performance compared to the knob at full volume.
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Going to do some testing bridged in to 8 ohms next and then will re-arrange my dummy loads to do some 4 ohm sweeps. Overall seems right on spec which is nice.
Michael