Peachtree GAN 4000 over the ATMA any day for the $$.....Atmasphere overpriced for their sound !....Better Music for thousands LESS....sorry Bro.
Atmasphere may indeed be overpriced, that's a matter of opinion, but at least it is properly designed and doesn't have load varying frequency response (a fact) like the Peachtree. That failing was addressed 25 years ago by competent class d designers (fact). Really unthinkable that a modern class d amp would have this shortcoming (opinion).