therealpbc
While the lack of treble may be the fault of your equipment it could also be the lack of break-in time. When I first got my M3s I thought they were extremely bright. I kept turning down the treble to tame the highs. The problem was that I was used to the sound of my old Paradigm atom speakers and they lack the kind of upper detail that the Axioms give you. Now my ears are used to the M3s so they sound proper and the Atoms sound lacking in treble. It is very important to live with speakers several weeks or months before you can really judge them. When I first got the M3s I hated them...now I think they are among the very best speakers I have ever heard. Give them a little time.