Seymour Duncan Seymour Duncan Combo 60 Preamp preset

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

The Seymour Duncan Combo 60 preamp documents the front-end circuit of a 60-watt version of Seymour Duncan's amplifier lineup. It reflects the company's careful approach to tube preamp design and their boutique-quality construction standards.

• Years produced: 1984–1991
• Made in: USA
• Wattage: 60W
• Channels: 2
• Preamp tubes: 3× 12AX7

Tags: american, modern, clean.

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.