Hi
Thank you for the link.
If the actual sensitivity of the LCD4 @ 200 Ohm is truely 97 dB / 1 mW, yes, an amplifier that delivers 200 mW into 200 Ohm suffices.
But if the actual sensitivity of the LCD4 @ 200 Ohm is truely 7 dB lower than the official specifications, as Tyll was found for measurement of sensitivity of the LCD-X @200 Ohm (note: watch the measurements on Innerfidelity headphones LCD-X Audeze, in particularly that of sample 3), then it will be necessary that the amplifier delivers in fact 1000 mW into 200 Ohm (and not 200 mW), which unfortunately is not able to do the King of Audeze (that delivers only 500 or eventually 600 mW into 200 Ohm).
Cordially.
PS: We will expect independent sensitivity measurements made by Tyll on Innerfidelity, to know the truth about the exact sensitivity of the LCD4 @ 200 Ohm.