SP20 vs Reference Two
The Reference Two's thd is 0.005% against the SP20's 0.003% and its weight 13.61 kg (30 lbs) against 8.06 kg (18 lbs). Both share output voltage (2.0V RMS) and width (482.6 mm).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersPhono Pre-AmpsHeadphone AmplifiersDiscontinued
Estimated price (community-sourced)
$4,000
Around — community and catalog average, updates slowly
About the SP20
The Audio Research SP-20 is a high-end, fully balanced, pure class-A preamplifier that incorporates both line and phono stages. It features a unique design that blends classic aesthetics with modern technology, including a touchscreen interface similar to the Reference 10 line stage. The SP-20 uses four 6H30 dual triodes and includes seven levels of voltage regulation. It offers a phono stage with 58 dB of gain, suitable for low-output MC cartridges, and a dedicated headphone amplifier with an ultra-low output impedance. The preamplifier supports both balanced XLR and unbalanced RCA inputs and outputs.
Specifications
Analog Output
Analog signal output specifications
- THD
- 0.003%
- SNR
- 125 dB
- Output Voltage
- 2.0V RMS
Connectivity
Input and output connections
- Analog Inputs
- RCA, XLR
- Analog Outputs
- RCA, XLR
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 482.6 × 133.35 × 419.1 mm (W × H × D)
- Weight
- 8.06 kg (18 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions