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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.
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