It's the room, or the amp or processor or source. I had a pair of M3s driven by a 5 wpc integrated tube amp and the mids were exquisite. There was a slight audible dip in the upper mid range but that's what separates the M3s from the Reference 3a de Capos, that and an additional $2,200.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.