2. amps-preamps
  3. 128359-41

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
charles1dad's avatar
charles1dad
10,250 posts
 
Ozzy,
Thanks and I sure you understand my observatIonal comment.   Read the threads on Audiogon and many other audio forums and they're full of people discussing their various journeys through the maze of audio equipment over the years.  

At some point some do finally find what they've been looking for.  Relatively few build their first system and retain all the initial components for life. That's all I am pointing out. A friend of mine has the same Audio Research power amplifier he bought new in the 1980s.  He's the exception rather than the rule. 
Charles 
ozzy's avatar
ozzy OP
7,608 posts
 

Charles,

We are on the same page. But, you've got to give Atma-Sphere and Ralph credit for allowing an ongoing upgrade path for his components. So that in itself will mean long term enjoyment with the latest and greatest version of his equipment.

ozzy

jond's avatar
jond
6,030 posts
 
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!
charles1dad's avatar
charles1dad
10,250 posts
 

Hi Ozzy, I certainly acknowledge and give  credit for a well thought out long term upgrade/updating pathway.

Charles

sdrsdrsdr
196 posts
 
Doesn't using zero transformers defeat the whole point of an OTL amp? It's putting  a transformer in and makes it similar to a non OTL push pull tube amp.
More to discover