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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

ozzy

Showing 4 responses by dragon_vibe

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.
dragon_vibe
430 posts
 
I have Ordered the following:

TJ Full Music 6SN7

Black Treasure 6SN7

Natural Sound Series 6SN7


These will be used for my MP-1 Pre-amp and Mp-3

I am still looking for tubes to replace the Atma-Sphere Nirvana Amplifier and the 6SN7 that go with the amp. I have ordered some NOS Sylvinia tubes too.

The TJ Full Music is the same as Sophia. I was told both come of the same production line but are labled for 2 different markets.
dragon_vibe
430 posts
 
Im still looking for more 6SN7 Tubes, but wont buy any untill i have spent enough time with the above.

Someone Asked About Atma-Sphere new Amplifier called the "Nirvana"


Maybe Ralph can chime in and explain what so special about these amps and why do they sell for more than the MA2 but produce less power.

dragon_vibe
430 posts
 
If you want my opinion on someone who owns the M60, The New Nirvana OTL Amp from Atma-Sphere and the MP3 as well as the MP-1.

Their is nothing that comes close to OTL Sound when paired with the right speaker your more or less at the end of your journey. These amps will give you transparency that only more expensive Solid state amps can achieve. A Sound which is neither Tobey or SS. Goose bumps during listening and a feeling of being their at a live event. Iv exchanged audio gear for the past 20 years and when I heard OTL nothing ever seems the same or sounds good enough. Speed, PRAT, Expansive Soundstage, Emotional Feelings, Live Sound, Transparency. The Amplifier just sounds like it does not exist. Their is hardly any colouration or distortion.

Personally i think Ralph sells his gear too cheap, the only gripe with OTL is they need to be paired with a good Speaker but their are alot of options on the market and if you cant find one suitable then the Zero can help you out.
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