@ricevs You are correct and so am I, a Kumbaya moment!
A.H.B.
The letters A, H, and B allude to the unique topology of the amplifier’s output stage. The AHB2 combines class-AB, and class-H topologies using a feed-forward error correction system.
But there is much more to the story -
The initials A.H.B. can be found on many of the circuit diagrams of Benchmark’s early products dating back as far as 1983. These are the initials of Benchmark’s founder, Allen H. Burdick. He personally designed many of Benchmark’s early products.
Allen had a life-long passion for audio, and he became one of the leading innovators in the pro-audio industry. The AHB2 is named in his memory.