No I have not heard AM.
It is always hard to address these outlandish claims, because I would have to be a professional reviewer… and with an enormous amount of time on my hands. But I do have fifty years of experience in pursuing high end audio. As I moved along the path I developed more skills in listening and pealed the onion of sonic understanding so to speak. Additionally, along the way I have tried main stream products and lots of giant killers and budget solutions that were revolutionary. The funny thing is, after hundreds of auditions and with all the pieces I have ever heard, and owned, none of these has ever been true.
Most recently, just to test the big claim that fake Nordost Odin 2 were nearly as good as the real thing. I bought couple pair. No surprise, they were not.
There are a number of reasons that these giant killers are not, is simply because many of the great audio companies of the west have been at it for decades… improving all aspects through generation after generation, using more carefully chosen materials, parts, geometries etc. It isn’t as simple as a cleaver design and cheap labor.
So maybe there is some startling discovery at AM that allows them to produce a component for $2.5K vs $20K component from ARC. If so, it is going to be flashed across the front pages of The Absolute Sound and Stereophile very soon. But for know I have my doubts.