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About the SL1 Ultimate 2
The Convergent Audio Technology SL1 Ultimate MK 2 is a two-piece, all-tube preamplifier featuring a main chassis and a separate power supply connected by an umbilical. It uses a steel chassis with resistive damping compound to control resonance, and circuit boards made of expensive G200 material for superior performance. The unit employs a matched set of tubes including 6922s and 12AX7s, chosen for quietness and stability. It has four inputs (two line, one phono or line, and one tape) selected by high-grade toggle switches, a stepped attenuator volume control manufactured in-house, and a balance control with 0.5dB steps over a 5dB range. Cardas RCA jacks are used throughout, and the preamp is single-ended only, designed to minimize parts for better sound quality. The SL1 Ultimate MK 2 includes an optional all-tube MC/MM phono stage. It is praised for its open, dynamic, and quiet sound, with excellent space, bass detail, and attack/decay characteristics. The price as of recent years is approximately .
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