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

128x128ozzy
dragon_vibe
430 posts
 
Why not try 4 M60 Amps,

Wiring the Mid and Tweeter with 1 amp.

Wiring your lower Woofer with another M60.


I was just thininking of doing this to my classic audio loudspeakers.

I have the New Atma-Sphere Nirvana Amps and 2 Pairs of M60.

The Nirvana are being used for the large speakers.

The M60 is paired with a 2 way Studio Monitor.
ozzy's avatar
ozzy OP
7,558 posts
 

dragon_vibe,

In essence that is what I'm doing, but for the low bass I am using 2 JL Audio F-113's subs.

ozzy

gdnrbob
4,471 posts
 
I am glad to hear you find the Zero’s benefit your system.
I have to say that I am surprised that they would make such a difference, considering that you have very efficient speakers to begin with.
Bob
ozzy's avatar
ozzy OP
7,558 posts
 

gdnrbob,

Bob, I think its a matter of impedance more so than sensitivity. The 16 ohm connection just sounds better than the 8 ohm.

ozzy

charles1dad's avatar
charles1dad
10,250 posts
 
Yep, Ozzy you went from an easy load to an exceptionally easy load. 😊
Charles 
More to discover