PA-One vs Unison Research SH
The SH's bit depth is 32-bit against the PA-One's 24-bit, its max sample rate 384 kHz against 192 kHz, its signal-to-noise 110 dB against 105 dB, and its thd 0.200% against 0.500%.
AI-generated product photo — not official manufacturer imagery.
AmplifiersHeadphone AmplifiersTube AmplifiersDACsPre-Amplifiers
Estimated price (community-sourced)
$1,175
Around — community and catalog average, updates slowly
About the PA-One
The Quad PA-One is a vacuum tube headphone amplifier, DAC, and preamplifier with USB, optical, coaxial, RCA, and balanced analog inputs; two 6.3 mm headphone outputs; RCA preamp outputs; selectable high/low impedance modes; and a 24-bit/192 kHz DAC. It uses five tubes: 2 x 6SL7, 2 x 6SN7, and 1 x EZ81, and is housed in a Lancaster Grey steel chassis.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 0.5W @ 8Ω
- Input Sensitivity
- 0.3V RMS
- Input Impedance
- 50000Ω
Digital Audio
DAC capabilities and digital audio processing
- Bit Depth
- 24-bit
- Max Sample Rate
- 192 kHz
Analog Output
Analog signal output specifications
- THD
- 0.500%
- SNR
- 105 dB
- Output Impedance
- 32Ω
Connectivity
Input and output connections
- Digital Inputs
- USB Type B, Optical S/PDIF (TosLink), Coaxial S/PDIF
- Analog Inputs
- Balanced XLR, Unbalanced RCA phono
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 180 × 163.5 × 284.5 mm (W × H × D)
- Weight
- 7.5 kg (17 lbs)
- Available Colors
- Lancaster Grey
Key Specifications
Power: 0.5W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions