I have listened to Vistas and Summits paired to M3. It's a very impressive amplifier. It has very neutral sound, excellent dynamics, extreme detail and resolution. It's also very stable at low impedances. At 8 Ohms it tops at 47.3 volts, at 4 Ohms 43.8, at 2 Ohms 39.6, and at 0.1 Ohms 11 volts, which is VERY impressive. So it drives the Logans with ease, and it will not roll of the highs.
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