Teisco Checkmate 60 - Channel 1 preset

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

The Teisco Checkmate 60 is the big two-channel head of Teisco's late-1960s Checkmate line, sold with a separate 2×12 speaker cabinet. Each channel has two inputs, a 12AX7 gain stage, a bright switch and its own tone network and volume. A 12AU7 drives the spring reverb, a 12AX7 oscillator runs a photocell tremolo, and a 12AU7 long-tail inverter drives two fixed-bias 6CA7 (EL34) output valves from a 5AR4 rectifier.

• Made in: Japan
• Wattage: 60W
• Channels: 2
• Preamp tubes: 4× 12AX7, 2× 12AU7
• Power tubes: 2× 6CA7

Tags: japanese, vintage, reverb, vibrato, 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.