Richard, I don't know anything about the M200, but so far as additional data go, while they're of technical interest, they may not be of any real significance to the buyer. For example, any properly engineered solid state amp has an output impedance low enough(0.1 ohm or less)so that it has a damping factor more than high enough. Since the M200 is more than 80,that means that the output impedance is less than 0.1 ohm(8ohm speaker impedance/80 damping factor). Likewise, if the amp's frequency response is essentially flat to 20Khz, that automatically means that the slew rate is high enough to allow that. Some advertise exceptionally high damping, slew rates, etc., but it's of no practical significance.
