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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
charles1dad's avatar
charles1dad
10,250 posts
 
Ozzy,
I understand , my speakers are 14 ohms and it seems as though my amplifier is just coasting along very relaxed and natural.
Charles 

atmasphere's avatar
atmasphere
11,960 posts
 
Driving easier speaker loads (high impedance) should be beneficial for all types of amplifiers and not limited to just tube power amplifiers.
Charles
+1  It continues to amaze me how many people don't get this basic fact!
bdp24's avatar
bdp24
9,966 posts
 
I've said it before, and I guess I'll say it again: For lovers of Magneplanar speakers, there is another magnetic-planar that is much better suited for use with tube amps---the Eminent Technology LFT-8b. It's nominal impedance is 8 ohms, but the m-p drivers themselves are a resistive 11-12 ohm load. Bi-amp (or even passively bi-wire) them with a tube amp on top and ss on bottom (for the 8" sealed box woofer, which operates via a 1st order-6dB/octave x/o from 180Hz down), and you won't miss your Maggies at all. Actually, many who have heard both prefer the ET's, even if they run them with a ss amp.
ozzy's avatar
ozzy OP
7,542 posts
 

atmashere,

Does the usage of the Zero’s draw more AC current? That is in monthly energy cost?

I ask this because the M-60's meters move a little now.

ozzy

realdeal
63 posts
 
There is always way  to design an OTL without using the ZERO,an OTL with  output transformer?? 
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