MA1 MkIII vs Synthesis Metropolis NYC 100i
The Metropolis NYC 100i's power @ 8ω is 100W against the MA1 MkIII's 140W, its power @ 4ω 100W against 135W, and its thd 1.000% against 0.500%. Both share class (Tube).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersTube Amplifiers
Estimated price (community-sourced)
$20,800
Around — community and catalog average, updates slowly
About the MA1 MkIII
The Atma-Sphere MA-1 MkIII is a high-end monoblock power amplifier renowned for its output transformerless (OTL) tube design, delivering 140 watts per channel into 8 ohms. It features a fully balanced differential circuit, patented Circlotronic direct-coupled output stage, and dual-mono chassis construction. The MA-1 MkIII is hand-wired point-to-point, uses premium components such as V-Cap Teflon coupling capacitors and custom resistors, and is stable with all input and load conditions. Its automatic biasing, built-in VU meter, and classic open chassis design make it both user-friendly and visually striking. The amplifier is celebrated for its clarity, speed, and lifelike sound reproduction, making it a reference choice for audiophiles seeking the purity of OTL tube amplification.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 140W @ 8Ω
- Power @ 4Ω
- 135W @ 4Ω
- Amplifier Class
- tube
- Minimum Impedance
- 2.3Ω
- Input Sensitivity
- 2.8V RMS
- Input Impedance
- 100Ω
Analog Output
Analog signal output specifications
- THD
- 0.500%
- Output Impedance
- 2.3Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 430 × 220 × 460 mm (W × H × D)
- Weight
- 16.3 kg (36 lbs)
Key Specifications
Power: 140W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions