Gibson GA-200 Rhythm King - Channel II preset

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

The GA-200 Rhythm King is a two-channel Gibson amplifier built as a separate preamp and main amp. Each channel has two inputs on its own 12AX7, with its own volume and tone controls, and a 12AX7 phase splitter follows the mix. Two 6BJ8s form a switchable compressor, and in the main amp a pair of 6SN7s drive a fixed-bias push-pull pair of 6550s, with a 6V6 regulating the screen supply and a GZ34 rectifier.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7, 2× 6BJ8, 2× 6SN7
• Power tubes: 2× 6550

Tags: american, vintage, clean, 6550, high-wattage.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.