He may well also to be correct.
All of us on the outside can only speculate and posture, especially when all we have is an anecdotal story or two.
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I’ve always felt companies building class A amps especially Pass built their products like tanks! Large, impressive heat sinks, bold industrial look. Never felt they lacked on quality.
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Class A requires a lot of heat dissipation and thus the design requires beefy heat sinks.
We sold (a few) of the Mark Levinson pure Class A amps in the late 70’s. 25 watts / 120lbs. Toroidal transformer the size of a Folgers coffee can. Sounded great.
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