Atma-Sphere M-60 Mk II.2 Tube Mono Power Amplifier Pair

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  • $3,953.00
  • Regular price $4,650.00

Atma-Sphere M-60 Mk II.2 Tube Mono Power Amplifier Pair


Do you appreciate the magic of a really good tube amp? Do you listen in a big (and dare I say air-conditioned) room? Do you make an honest living for crappy pay? Then you, my friend, should drive like hell to the nearest Atma-Sphere dealer you can find and clap your ears on a pair of these.

Serial number: 573

For years now the M-60 in its various forms has been the subject of the Soundstage!.com Hall of Fame Award, The Absolute Sound Golden Ear Award and Editor's Choice, with numerous accolades in the press and on the web. 


  • Exclusively triode-based, vacuum tube circuitry 
  • Pure class-A operation 
  • Patented Atma-Sphere direct-coupled (OTL) output stage 
  • Balanced Differential Design
  • Mono chassis construction 
  • Easily monostrapped for greatly increased power 
  • Standby switch for long output tube life 
  • Only one stage of gain throughout 
  • XLR and RCA input connectors 
  • Proprietary, precision grade components used throughout 
  • Low-noise "star" ground circuit 
  • Fully hand wired electronics; no circuit boards! 
  • Classic open chassis construction with Wrinkletex finish 
  • Two-year general coverage warranty, one year on output tubes


Power: 60 W / channel into 8 ohm load, 45 W / ch. into 4 ohm, 80 W / ch. into 16 ohm
Power bandwidth: 2 Hz to 75 kHz (+- 0.5 dB)
Frequency response (1 W): 1 Hz - 200 kHz within 1/2 dB 
Intermodulation distortion: 0.05 % @ full power
THD: typically under 1 % with proper setup
20Hz square wave tilt: Unmeasurable
Phase shift: less than 1 degree @ 20 kHz
Power supply storage: 140 J / chassis
Output section risetime: 600 V / micro-second
Output impedance: ~4.1 ohm 
Feedback: 1 dB
Power consumption: 300 W / chassis
Tube complement: 8 x 6AS7 / channel and 4 x 6SN7
Weight: 30 lb
Dimensions (WDH): 17 x 13 x 8.5" 


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