Sunn 200S preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The schematic filed for the Sunn 200S (no title block) shows a single-channel head: a two-stage 12AX7 preamp with Lo and Hi boost switches, a treble/bass stack, a 6AN8 gain stage and cathodyne inverter, and a fixed-bias push-pull pair of beam tetrodes (KT88s on this drawing) on a GZ34 rectifier.

• Made in: USA
• Wattage: 60W
• Channels: 1
• Preamp tubes: 1× 12AX7, 1× 6AN8
• Power tubes: 2× KT88

Tags: american, vintage, bass, 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.