M60 MkIII vs M60 Mk.3.3
The M60 Mk.3.3 matches the M60 MkIII on power @ 8ω (60W), power @ 4ω (45W), thd (1.000%), and output impedance (4.1Ω).
AI-generated product photo — not official manufacturer imagery.
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
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 60W @ 8Ω
- Power @ 4Ω
- 45W @ 4Ω
- Amplifier Class
- A
- Minimum Impedance
- 4.1Ω
- Input Impedance
- 100000Ω
Analog Output
Analog signal output specifications
- THD
- 1.000%
- Output Impedance
- 4.1Ω
Connectivity
Input and output connections
- Analog Inputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 430 × 200 × 330 mm (W × H × D)
- Weight
- 13.6 kg (30 lbs)
Key Specifications
Power: 60W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions