Can the D-200 's adequately drive the difficult load of the Sound Lab M1 Electrostatic loudspeakers?
Honestly, I don't know...you'd just have to try them. We've had good success with other electrostatic and planar types though. Lower impedances don't cause a problem but capacitive loads can sometimes be an issue with amplifiers. We've had customers use them with Maggies, Quads, and Martin Logans and all have reported good results.