Was sensitivity changed as part of repair?

Worth also pointing out that D600's were multi amp, so not just 1x70w amp. Not sure how many amps M1's had.

Also, if D600's were like 200 series, volume went iirc 0-64 not 0-99 like modern kit, so yes, above 60 would be very loud.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).