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Look at the tests done on these Sophia’s, the last 2 sentences first paragraph, indicates that many amps that have output transformers (tubes and the MC452) or amps with limited current ability, will sag a little current wise in the bass, and because of that will give a brighter presentation to the balance of the speaker.
Look for amps that have good current drive down to 2ohms if you want a more even natural balance, as Wilson would have voiced them. Probably with Krell or D'Agostiono amps or such.
I have had a pair of Focal Sopra No2's, like the Wilson's, have a tweeter that will bring out harshness in the electronics.
For nearly a year I've had a McIntosh C50/MC452 and have been extremely happy with that setup. This amp has the smoothness of a tube amp, but (to me) sounds faster and more precise, hardly "breaks a sweat" driving my speakers.
I've had the "hots" to swap out and try all sorts of other equipment, but not with the C50/MC452!