Seymour Duncan Convertible 60 - Rhythm preset

Close · 76/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

This is the preamp board of the Seymour Duncan Convertible 60, the 60-watt Model 1200 combo. A JFET and MOSFET input stage feeds two sockets for Seymour Duncan’s plug-in preamp modules (not drawn). A relay picks between them, each path with its own volume, and the signal then goes through a shared op-amp bass, mid and treble section, an LM380-driven reverb with RCA send and return, and an op-amp effects loop before the tube power amp.

• Made in: USA
• Wattage: 60W
• Channels: 2

Tags: american, mid-wattage.

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.