What tubes does the Seymour Duncan Convertible 60 Preamp use?

The Seymour Duncan Convertible 60 Preamp uses 12AX7 preamp tubes.

When was the Seymour Duncan Convertible 60 Preamp produced?

The Seymour Duncan Convertible 60 Preamp was produced 1985–1990.

Seymour Duncan Convertible 60 Preamp preset

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

The Seymour Duncan Convertible 60 preamp section is the input and gain-shaping stage of the Convertible 60-watt amplifier, featuring a dual-channel 12AX7-based design with Seymour Duncan's characteristic attention to harmonic detail and dynamic response. The preamp circuit offered clean and lead channels with independent controls, voiced to maximize the musicality of the all-tube signal path. This preamp schematic is of particular interest to technicians and builders due to its carefully tuned input and driver stages.

Years produced: 1985–1990
Made in: US
Wattage: 60W
Channels: 2
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.