Frank-
Have you considered designing and bringing to market a pure Class A set of mono blocks, perhaps based on your M225 topology?
I know Class A amps run hot and heavy but there is an undeniable sweetness and rightness of tonality that can’t be beat!
My Bryston 28’s first 50 watts are Class A then shift to AB and it’s easy to hear the transition. There is something very special going on in the first50 watts!
150 watt Class A amps would be just the ticket.
Curious and inquiring….
g e