Teisco Checkmate 17 preset

Verified · 89/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Teisco Checkmate 17 is a small combo: a 12AX7 provides two gain stages with tone and volume, driving one 7189A (EL84-family) in single-ended class A for about 5 watts, with a 6X4 rectifier and no feedback. A second 12AX7 runs a small spring reverb and a phase-shift tremolo.

• Made in: Japan
• Wattage: 5W
• Channels: 1
• Preamp tubes: 2× 12AX7
• Power tubes: 1× 7189A

Tags: japanese, vintage, el84, reverb, tremolo, low-wattage.

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.