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AmplifiersTube AmplifiersPower Amplifiers
Estimated price (community-sourced)
$3,000 - $8,200
Around — community and catalog average, updates slowly
About the M60 MkIII
The Atma-Sphere M-60 MkIII (Mk. 3.3) is a pair of monoblock OTL (Output Transformer-Less) tube amplifiers delivering 60W into 8Ω, 45W into 4Ω, and 80W into 16Ω loads. Featuring eight 6AS7G output tubes and four 6SN7 driver tubes per channel, these class A amplifiers employ a differential cascode circuit for noise rejection and include a bridge output circuit for speaker protection during tube failures. The design incorporates minimal negative feedback (1dB) and achieves a power bandwidth of 2Hz-75kHz (±0.5dB).
Specifications
Key Specifications
Power: 60W
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