@curiousjim I built the Hafler kits, DH220 and accompanying preamp. Great value for the money and time spent. It was definitely Class AB, with the huge MOSFET transistors and enormous heat sinks. I used the pair in one system or another for 40 years... They're still in storage somewhere, and they make me nostalgic for my early audiophile days...
a rant
after 30 years of being so enamored with stereo equipment - im ok now just listening to music
im no longer chasing - whenever i have bought new equipment it never sounded as good as i think the reviewer thinks it does. maybe 5% sounded really good and the other 95% - im still waiting for them to break in.
My fantastical brain wanted every piece of equipment to sound incredible. i think the key word is "chasing".
See, now tube amplifiers are all the rage again - it was class d about 3 years ago - it was solid state about 6 months ago - whenever i have tubes - i want solid state, whenever i have solid state - then i want tubes - then ill try class d in the meantime
Im just saying - this hobby is the "space mountain" of roller coasters - ya think!