This is the Runoff Groove Supreaux, their first interpretation of a Supro 16T amp.
It's also known as the JHS Superbolt - which is almost identical to the Supreaux, but runs at 18v with a gain switch added. Just put the schematics side by side, and you will see what I mean.
I added the 22n input cap, which is missing from the original (it appears on the JHS version). Swap it for a 100k resistor if you prefer the original - or you could do both.
Like anything using J201s - make sure you buy real ones or prepare for disappointment. Bias drains to half voltage as a starting point and then tune by ear.
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