What tubes does the Seymour Duncan Model 2000 Preamp use?

The Seymour Duncan Model 2000 Preamp uses 4× 12AX7 preamp tubes.

When was the Seymour Duncan Model 2000 Preamp produced?

The Seymour Duncan Model 2000 Preamp was produced 1985–1990.

Seymour Duncan Model 2000 Preamp preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Seymour Duncan Model 2000 preamp is a rack-mount tube preamplifier unit offering multiple switchable channels. Seymour Duncan's foray into amplification brought boutique-adjacent quality to a modular format popular with studio and touring professionals in the 1980s.

Years produced: 1985–1990
Made in: USA
Channels: 3
Preamp tubes: 4× 12AX7

Tags: american, modern, high-gain.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.