I've always found Naim a little too cold and analytical for me but then I'm not as big a fan of the QUAD 'current dumping' poweramps compared to my 303's either.
You left my 2nd favourite Amplifier company off that list too...............Sugden. 30+years ago when I split up with Pamela she asked me to help her buy a new HiFi Amp, we auditioned the Naim Nait, the (Mission) Cyrus and the Sugden A25b and the Sugden was by far the better
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It's a class A - A/B design that runs class A up to about 4w then A/B up to about 35w but Pam wasn't like me and didn't really crank music up so at her volume levels it sounded lovely