Can't speak for the HF81 but my HF35 6L6GC monos with new caps are outstanding. Lovely musicality, timbre, and delicacy and decent clean articulate bass.
Nice write-up, Pokee. Not quite an 81 but I have 2 pairs of HF35s. 35watt mono amps. One is a Stu Remmington rebuild with chokes and fixed bias. They are glorious.
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