There was a similar thread recently.Search Sonus Faber & it should come up.
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Yes, though not a lot of critical listening. Initial reaction was the sound was very consistent with the SF sound of today which maintains both a focus on delivering beautiful midrange while also delivering a slightly drier and more linear sound than in days gone by. It also seems capable of greater power/volume with the right amplification (not necessarily deeper bass) than i believe much older models of SF were. Overall, very impressive. Just my 2 cents.
I have returned them. They were not a good fit for me. I listened extensively to both the 4 and 8 ohm taps on my ARC Ref 110 and neither seemed to be a great fit. The 6 ohm impedance and 3.1 minimum impedance are not really tube amp friendly. Sound was too boomy overall and bass was fairly "one note" in my room. Bueautiful speaker, but not a good match for me.