S-30 Mk. 3.3 vs Unison Research S6
The S6's power @ 8ω is 35W against the S-30 Mk. 3.3's 30W, its output impedance 6Ω against 8Ω, and its weight 25 kg (55 lbs) against 10.89 kg (24 lbs). Both share class (A).
AI-generated product photo — not official manufacturer imagery.
AmplifiersTube AmplifiersPower Amplifiers
About the S-30 Mk. 3.3
The Atma-Sphere S-30 Mk. 3.3 is a high-end stereo OTL tube power amplifier using a fully balanced, class-A triode output stage with patented Circlotron direct-coupled topology and all-octal triode vacuum tubes. Its hand-wired circuitry is designed for stability with any load and is voiced to outperform single-ended amplifiers, making it a strong choice for high-efficiency loudspeakers that do not require high power. Features include automatic bias, a front-panel VU/level meter, RCA and XLR true balanced inputs, and output power of 30W per channel into 8 ohms and 45W per channel into 16 ohms. The S-30 is aimed at discerning audiophiles seeking precision, clarity, and the characteristic transparency of Atma-Sphere's OTL designs in a compact chassis.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 30W @ 8Ω
- Amplifier Class
- A
Analog Output
Analog signal output specifications
- Output Impedance
- 8Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 330.2 × 203.2 × 431.8 mm (W × H × D)
- Weight
- 10.89 kg (24 lbs)
Key Specifications
Power: 30W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions