Best power amp for Martin Logan Expression 11a

You need an amp that can be comfortable driving this impedance and be stable as well, just about all tube amps and solid state amps that can’t do current may roll off the highs making them sound distant and subdued.

Absolute Sounds test: "The impedance curve sinks to 1 Ohm above 10kHz – almost a direct short (electrostatics are large capacitors). Some amplifiers may not like this;"

This is typical of all ML’s esl’s

Cheers George

@mike_f, did you try the RM-200’s 1 ohm tap?

Then you may not have enough wattage from it for loud listening. 

Cheers George