What tubes does the Seymour Duncan Duncan Modules use?

The Seymour Duncan Duncan Modules uses 12AX7 preamp tubes.

When was the Seymour Duncan Duncan Modules produced?

The Seymour Duncan Duncan Modules was produced 1984–1990.

Seymour Duncan Duncan Modules preset

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

The Seymour Duncan Duncan Modules schematic documents the modular preamplifier and effects routing boards used within the Seymour Duncan amplifier systems, providing circuit detail for the individual gain, tone, and switching stages built as discrete plug-in modules. This modular approach allowed service technicians to replace individual sections without depopulating an entire circuit board, and it reflected Seymour Duncan's engineering philosophy of building to a higher standard of serviceability than typical production amps. The modules documentation is essential for maintaining and restoring any Seymour Duncan amplifier system that uses this platform.

Years produced: 1984–1990
Made in: US
Preamp tubes: 12AX7

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.