Hello widl,
I’ve owned a set of M50’s for about 4 yrs now, and I do respect the other comments, even comments by Alan Lofft , but I have never felt that the M50’s are laid back. They sing, with plenty of detail. A lot of people confuse detail with volume. I’ve been into audio gear for over 25 yrs and have auditioned speakers by API, Paradigm, Klipsh, Infinity, Bose, Linn, Kef and others and would rate the M50’s with any speaker in their price range. And although I have never heard the M60’s, I bet the M50’s sound closer to the 60’s then the guys and girls at Axiom care to confess. Rate them too closely to the 60’s and they could steal sales away from a more profitable product. That’s just good business.
Your issue sounds like they might be more environmental then anything else.
Is your listening area heavily upholstered? i.e lots of cushions and/or thick carpet and the like.
As someone else suggested, check the controls on your electronics, bass, treble, filters etc.
