Thanks for the review. When this amp was announced, I was interested by the incredible signal to noise ratio they were quoting. I am not aware of any other amp that gets close.
But it is not a Class A amp; it is about as far away from Class A as a Class AB amp can get.
I don't understand why Benchmark have an auto shut-off, but no auto power up on signal, which is what everyone else does. That would annoy me. Given it looks like it would consume very little power at idle with a SMPS and class-H supply rails, it is all a bit odd.
Given how low the distortion is on this amp, I am sure you are correct that it would take 5 minutes or so for the transistors to reach their correct operating temperatures and stabilise the circuit.
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