Atma-Sphere M-60 MkIII Mono Amplifiers

One pair of Atma-Sphere M-60 mkIII mono amplifiers. The 6AS7 power tubes are new (Russian) and the 6SN7 pre-tubes are old stock Sylvania recently purchased from a reputable tube dealer. Covid messed up my business so I gotta part with 'em.�

I am the original owner, no pets, no smoke though I did use edibles a couple of times while listening to Phish. I rated them a 7 ONLY because I scratched the powder coat on the back of one of the amps when I took it out of my rack. These amps are in fantastic shape other than that blemish.

- Class-A2 operation
- Patented Circlotronic® direct-coupled (OTL) output stage
- Dual-mono chassis construction
- Automatic bias - no adjustment needed
- Built in VU meter for tube and output monitoring
- Easily monostrapped for greatly increased power
- Standby switch for long output tube life
- Proprietary precision components used throughout
- Low-noise "star" grounding topology
- Fully hand-wired point-to-point electronics - no circuit boards!
- Stable with all input and load conditions
- Exclusively uses Octal-Triode based vacuum tubes
- Classic open chassis construction with Wrinkletex™ finish

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

The M-60 Mk. 3.3 continues that tradition with classic styling and its award-winning state-of-the-art performance. The M-60 gives you the features and precision performance of our larger models in a beautiful, 60-watt package. The amp operates class A and is unconditionally stable with reliability proven over many years. The power tubes are inexpensive, readily available and do not require any matching. Sporting a classic, open-chassis construction, the M-60 Mk. 3.3 sets the bar for hi-end amplifier performance.