I made some Hood amps from the schematic - they were very good for what they were - an early, simple amplifier with a pretty topology. The biggest issue was the big cap in the feedback circuit.
Class A means very little - a high bias A/B can sound just as good. Most rate their “Class A” rating into a 8 ohm load so if a amp is rated at 50W Class A into 8 ohms - that same amp will only produce 25W class A into a 4 Ohm load.
Look into thd Yamaha AS series integrated amps - beyond excellent sounding units.
Nelson Pass wrote an excellent paper on Class A amps you can read it on the Pass DIY site
Agree agree with post about AB amps - my quad qsp power amp had AB power but used A purely for first watts then AB on demand for surge(they call current dumping) - very smooth and detailed . I partnered with valve pre-amp but they make integrated too so may be economical option. The integrated is elite model.
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