Paul,
I once upon a time had the REF 10 with a Centaur stereo amp. My results were mixed. It was a function of the speakers. It was a great combination with the Magico Q1s but kind of sucked with my Nola Baby Grands. Whereas my Ref250s were easily bested by the Centaur on the Q1s and the REF250s easily bested the Centaur with the NOLAs.
Some speakers shine with tubes, some with SS and some are very good with both.
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