The M6 is probably as bad as match for any SET that exists. If you are going to use SET's then as several have said use the appropriate/efficient speakers.It may be me, but I find it really irritating that many modern speakers have such low efficiency. As in 95dB or less. There is no excuse for it IMO. Low efficiency then needs 10x the power to play full scale dynamics. Plus the heat and waste of energy. MBL hovers around 86dB efficiency!
I would like to see the impedance curve on the M6. I would suggest not an ideal match to get the best from a SET.
Bob, the Diesis Roma or Odeon Carnegie would be much more suitable.
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