SL1 III

About the SL1 III

The Convergent Audio Technology SL1 III is a legendary tube preamplifier that has been continuously refined since its original release in 1985. It features separate line and phono circuits using a complement of 6922 and 12AX7 tubes, with the MKIII version specifically using 6922 tubes in the line stage positions for improved performance. The preamplifier offers exceptional channel separation (>90dB), ultra-low distortion (<0.0005% line, <0.001% phono), and a wide frequency response (0.1Hz to 800kHz line, 20Hz to 20kHz phono). It includes a user-adjustable input impedance for phono cartridges and a high maximum output voltage of 50V RMS. The chassis is constructed from 1/8" steel with internal resistive damping compound to minimize resonance, contributing to its reputation for sonic clarity and musical realism. The SL1 III is supplied with a separate power supply connected via an umbilical cable. It is considered by many audiophiles as one of the best preamplifiers in the world, with a price reflecting its status and build quality.