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DMC-20
Spectral AudioAmplifiersPhono Pre-AmpsDiscontinued
Estimated price (community-sourced)
$3,500
Around — community and catalog average, updates slowly
About the DMC-20
The DMC-20 is a dual-monaural reference preamplifier designed for use with Spectral’s separate DMS-20 power supply. Its discrete, wide-bandwidth circuitry includes a high-current MOSFET output stage, a precision stepped conductive-plastic volume attenuator, and protection against DC offset and oscillation. The system supports multiple line-level inputs and outputs; optional modules add balanced input, balanced output, and phono capability. The DMS-20 supplies separately regulated power rails to the preamplifier.
Specifications
Type: Dual-monaural solid-state preamplifier; Power supply: Separate DMS-20; Inputs: Seven listed positions—tuner, disc, three auxiliary inputs, optional balanced input, and optional phono; Outputs: Normal, inverted, balanced (with optional Model 201 module), and tape; Volume control: 32-step conductive-plastic attenuator with modified-log taper; Balance: 15-step attenuator with center bypass; Mute: 0–20 dB attenuation; Modes: Stereo/mono and absolute phase; Output stage: Discrete circuitry with complementary power MOSFET output followers; Maximum output current: Up to 1 A per channel; Rise time: 70 ns; Optional modules: Model 202 phono module and Model 203 balanced input module; DMS-20 supply: Separately regulated rails, 80 W typical and 175 W maximum power consumption; Preamplifier dimensions: 483 × 63.5 × 317 mm (W × H × D); Preamplifier weight: approximately 5.25 kg.