MA3 vs Vacuum Tube Logic (VTL) Siegfried II
The Siegfried II's power @ 8ω is 650W against the MA3's 500W, its thd 2.500% against 0.500%, its input impedance 45Ω against 100Ω, and its input sensitivity 1.5V RMS against 2.5V RMS.
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AmplifiersPower AmplifiersTube Amplifiers
About the MA3
The Atma-Sphere MA-3 represents the pinnacle of OTL amplifier design, producing 500 watts per channel effortlessly across a wide range of speaker impedances without electronic artifacts. It features a single gain stage, patented direct-coupled output circuit, and automatic bias control, ensuring a direct signal path and exceptional transparency. Class A operation with all-triode configuration, wide bandwidth, low distortion, and unique features like bank-switchable output tubes (1/3, 2/3, or full power), built-in tube testing, panel meters for VU level, tube condition, bias, DC offset, and AC voltages, plus integrated AC line conditioning allowing full power from as low as 100V. Custom components include precision Caddock resistors and tailor-made filter capacitors. Consists of separate amplifier and power supply chassis per channel. Latest version is Mk. 3.3.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 500W @ 8Ω
- Input Sensitivity
- 2.5V RMS
- Input Impedance
- 100Ω
Analog Output
Analog signal output specifications
- THD
- 0.500%
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 530 × 380 × 800 mm (W × H × D)
- Weight
- 36.3 kg (80 lbs)
Key Specifications
Power: 500W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions