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
Do you notice a difference? Can you toggle it on and off?
I am just curious, I never heard of it prior to this thread.
B
Bob, if you are interested in learning about DEQX, when you have some time available to read through a lengthy thread see the following one:

https://forum.audiogon.com/discussions/is-deqx-a-game-changer?

And their website is worth visiting as well, of course:

http://www.deqx.com/

I use their top of the line HDP-5 model, which serves as my preamp as well as providing speaker and room calibrations/corrections.  (And yes, to answer your question those can be switched off or on at the touch of a button on either the remote or the front panel).

My own experiences getting it dialed in, which at my slow and methodical pace extended over about 6 months, are reported in the above mentioned thread in posts between 5-16-2015 and 12-2-2015.

Best regards,
-- Al
  

gdvrbob,

almarg's earlier post that he references to above is what got me interested in the DEQX units. It is quite the animal. The one I have is the Premate+. I bought it used. It is a preamp, it analyzes your speakers + subwoofers, your room, and you can make corrections based on the graphs and charts produced. It also has a variable crossover for subwoofers including delay and gain adjustments. 

But, there is a stiff learning curve because it is a complex unit and the instructions are complete but in a confusing order. I have finally developed my own easy to follow notes that allows me to take measurements quicker. But it still can take 2-3 hours.

ozzy