Atma-SphereM-60 MKIIIusedAtma-Sphere M-60 MKIII SERIAL # 741Legendary OTL created by Ralph KarstenHere is an opportunity to own this piece of audiophile history. It's the first practical OTL tube amplifier EVER! There is no matching the 600V/microsecond r...3499.00

Atma-Sphere M-60 MKIII SERIAL # 741

Listing ID: lis79bg0 Classified 
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Condition
9/10
Payment methods
Ships fromEl Granada , CA, 94018
Ships toUnited States
Package dimensions18.0" × 18.0" × 24.0" (70.0 lbs.)
Shipping carrierunspecified
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Original accessoriesManual
AverageResearch Pricing

Legendary OTL created by Ralph Karsten

Here is an opportunity to own this piece of audiophile history.  It's the first practical OTL tube amplifier EVER!  There is no matching the 600V/microsecond rise time and power bandwidth from 2Hz to 75Khz.  Hear all your music in a new way!

This amplifier was factory updated to MKIII by Atma-Sphere about 10 years ago.  The base model was upgraded with the following:

1.  Tin Foil V-Cap coupling capacitors for transparency throughout the audio range ($600 when updated)

2.  Expanded capacitor banks for bass authority ($400 when updated)

3.  Custom high current Hexfred diodes in power supply

4.  Vibration damping in chassis to minimize microphonics ($400 when updated)

5.  Low oxygen copper wire with Teflon insulation in signal path

6.  Pure copper Cardas posts

There have been no modifications since they were factory upgraded.

I'm including photos of the wiring inside the amplifiers so you can see how lovingly they were built.  Every soldering joint is wrapped before soldering to ensure absolute reliability for decades to come.

For all specifications, please feel free to look at the following web page:

http://www.atma-sphere.com/Products/#M-60

If you would like the full history of my amplifiers, please contact me.  It's a good story!  If you have any questions, please contact me.  When you want to purchase, please contact me.  Please do so at [email protected].  If you would like to talk to me by phone, please email me, and I'll send you my number and arrange a time to talk.

If you desire the newest version of these amplifiers, I strongly suggest you purchase these and have it updated.  The update will cost $800.  I have been through the process, and I would be happy to usher the amplifiers through.  If you do this, you will get the equivalent of brand new amplifiers with all the new circuitry complete with a new warranty.  You can contact Ralph Karsten at Atma-Sphere to find out about all the benefits of his newest engineering.  His contact information is on the website mentioned above. 

The included tubes are well functioning, but you may want to change some of the stock driver tubes.  I've never found the need as sound is pretty amazing.  Ralph Karsten has advised me well in the past. If you would like recommendations for tubes, I'm sure he can help you out.  I am including a complete set of extra Russian tubes (as opposed to the Chinese tubes that are currently installed).  They were my first set, and they still sound great.

I would like to mention that shipping cost will be the responsibility of the buyer.  If you want a quote, please tell me how you would like them shipped, and I will do the legwork and find out how much it will cost.

Last, if you would like original boxes, I can get them from Atma-Sphere. 

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