Amps Atma-Sphere M-60 Mono blocks OTL design


I just purchased a used OTL Atma-Sphere M-60 mono blocks that I have sent to Atma-Sphere to be upgraded to the current model 3.3 and I also added the option of a higher quality power supply and V caps.

I have sold my old trusted Eggleston Andra 2’s speakers and have built some monitors using Aurum Cantus ribbons (102db) and Aurum Cantus midwoofers (90db) that are both rated as 8 ohm nominal. I have a DEQX Premate and will be crossing over to (2) JL Audio F-113 subs at 80hz.

Currently I am using a solid state high power stereo amp (Pass Labs) that I used with the Andra 2’s.

The Atma-Sphere M-60 is rated at 60 watts class A and is said to work better with higher impedance loads.

It will probably be a few weeks until I get the M-60 and was hoping someone could provide opinions of what to expect.

I listen to late 60 early 70’s classic rock music mostly. Sometimes loud.

ozzy

ozzy

Showing 7 responses by jond

ozzy took a look at your pics nice job on the new speakers! Congrats on your new amps also, I've only heard atma-sphere amps once, at the Capitol Audiofest this summer, and the sound was fantastic. I am sure you will be very happy and finding out your amps are more up to date than you thought is a very happy outcome in a used transaction! Hang in there and savor the anticipation!
Come on ozzy how do they sound already?? Don't leave us all hanging here! :P
Sorry to hear of your posting and other troubles ozzy and thanks for the update. Obviously you've put together a very complicated system there with many moving parts. I am guessing it would take substantial time and tinkering to get it sounding the way you want after dropping something as monumental as new amps into the mix. Not to mention you said the speakers themselves are recently completed and probably need some further running in time. So good point no need to critique now just take your time to get it all sounding right and remember it's a marathon not a sprint, you'll get there eventually!
ozzy glad to hear you're enjoying the amps and not already thinking about your next amp,  at Audiogon we call that progress :-p. Seriously though have fun roll tubes and just settle into that sound for a while I am sure its going to continue to improve for you. Happy listening!
ozzy between this and your graphene contact stuff experiment I think we need to dub you "The Tinkerer"! Not sure I've ever seen someone do so much to their system in such a short period of time ;-) glad you're having fun and keep keeping us posted!