WA2 (OTL Design) vs Unison Research SH
The SH's signal-to-noise is 110 dB against the WA2 (OTL Design)'s 95 dB, its thd 0.200% against 0.080%, its damping factor 3 against 1.43, and its output impedance 6.9Ω against 70Ω.
AI-generated product photo — not official manufacturer imagery.
AmplifiersHeadphone AmplifiersTube Amplifiers
Estimated price (community-sourced)
$900 - $1,499
Around — community and catalog average, updates slowly
About the WA2 (OTL Design)
The Woo Audio WA2 (OTL Design) is a handcrafted, Class-A, all-tube single-ended triode headphone amplifier built with an output transformerless (OTL) circuit and point-to-point wiring. It is designed for high-impedance headphones, uses a tube complement of two 6080 power tubes, two 6922 driver tubes, and two 6CA4 rectifier tubes, and features a 1/4" headphone output, four RCA inputs, and an anodized aluminum chassis available in black or silver. The WA2 is designed and assembled in New York, USA, and is offered with a 3-year limited warranty.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 0.31W @ 8Ω
- Amplifier Class
- A
- Damping Factor
- 1.43
- Input Impedance
- 100Ω
Analog Output
Analog signal output specifications
- THD
- 0.080%
- SNR
- 95 dB
- Output Impedance
- 70Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
- Analog Outputs
- 1/4" (6.3 mm) stereo headphone output
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 330 × 140 × 229 mm (W × H × D)
- Weight
- 7.7 kg (17 lbs)
- Available Colors
- Black, Silver
Key Specifications
Power: 0.31W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions