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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

128x128ozzy
atmasphere's avatar
atmasphere
11,793 posts
 
As usual, the layout looks meticulous.

I assume the front 6SN7 nearest the faceplate still has the most effect when tube rolling?
Yes.

It seems to sound a lot better too. In particular the phono has more gain and less noise. My workers take a lot of pride in their work and usually sign the equipment after its done.
ozzy's avatar
ozzy OP
7,459 posts
 

gdnrbob,

There are some pictures on my systems page. Except for the front baffle they are hi-gloss and near impossible to take a quality picture of them. The sides and back are curved.

ozzy

jond's avatar
jond
5,792 posts
 
Come on ozzy how do they sound already?? Don't leave us all hanging here! :P
bigboltz
55 posts
 
Yeah ozzy, whaddaya think?!
bigboltz
55 posts
 
Well Ive had my MP3 3.3 for 24 hrs or so.   I'm sure I would have to take out a 2nd on the house or sell a kidney to do any better.  Its early but clearly a big step up for me.  The staging is super cool. Each instrument pinpointed in its own space. Depth is remarkable.  

This will surprise no one, but Ralph has been wonderful in his support and has shown great patience with all of my questions and requests. 

Thanks to you and your team, atmasphere!
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