Atmasphere amps are fabulous. There are many great aspects of the OTL sound that can be found in the many reviews of their gear. As with much amplification and maybe to a greater extent due to the unique amp characteristics, matching amp to speakers is key.
Atmasphere amps trustable?
Tube world, a big world, then I came acorss the Atmasphere on the net, looks different from those common tube stuff... kinda weird, the M-60 uses 8x 6AS7G output tube and 4x 6SN7 driver tube per channel, where're the rectifier tubes? Plus they're so-called OTL, sounds even more weird.