Teisco Checkmate 50 - Channel 2 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Teisco Checkmate 50 has two instrument channels with passive treble/bass and volume, spring reverb, an optical tremolo and a separate transistor effect oscillator. A 12AX7A long-tail inverter drives two fixed-bias 6L6GCs from a 5AR4 rectifier.

• Made in: Japan
• Wattage: 50W
• Channels: 2
• Preamp tubes: 5× 12AX7, 1× 6AQ8
• Power tubes: 2× 6L6GC

Tags: japanese, vintage, 6l6, reverb, tremolo, mid-wattage, two-channel.

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.