Just my 2-cent as an Atma-Sphere owner. Unfortunately I have no experience with the Berning amp.
I put a pair of M60 MK2.2 into my system this past July and in a matter of days decided to sell my Krell monoblocks that I have happily lived with for more than 10 years.
To my ears the AM is simply "truer" and "righter" than anything else I have listened to as far as timber accuracy and tonal balance go. It has none of the problems I've heard from other tube amps possibly in part due to AM's elimination of output transformer. Both extreme ends of audio spectrum are well extended and defined, sound stage and imaging is also as good as any I've heard. This all from pairing it with a pair of less than ideal speaker with a nominal 4-ohm impedance.
The reliability has not been an issue. It never missed a bit from day one.
There is also something to be said about the benefit of completly point-to-point wiring without the use of PCB. This also opens up the opportunity for future tweaking and upgrading if you are into the sort of things.
I like it so much that I am actually in a process of getting a pair of MA-1 Silver to better match my speakers.
Hope this helps! Best of luck and happy listening!
I put a pair of M60 MK2.2 into my system this past July and in a matter of days decided to sell my Krell monoblocks that I have happily lived with for more than 10 years.
To my ears the AM is simply "truer" and "righter" than anything else I have listened to as far as timber accuracy and tonal balance go. It has none of the problems I've heard from other tube amps possibly in part due to AM's elimination of output transformer. Both extreme ends of audio spectrum are well extended and defined, sound stage and imaging is also as good as any I've heard. This all from pairing it with a pair of less than ideal speaker with a nominal 4-ohm impedance.
The reliability has not been an issue. It never missed a bit from day one.
There is also something to be said about the benefit of completly point-to-point wiring without the use of PCB. This also opens up the opportunity for future tweaking and upgrading if you are into the sort of things.
I like it so much that I am actually in a process of getting a pair of MA-1 Silver to better match my speakers.
Hope this helps! Best of luck and happy listening!