Kay 820 - Normal preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Kay 820 is a mid-to-upper model in Kay's 800 series tube amp lineup, delivering approximately 20 watts through a push-pull 6L6 output section with a feature set that includes tremolo and basic reverb on higher-specification versions. Its Chicago-built construction reflects Kay's cost-conscious but competent manufacturing approach, using proven American tube designs scaled to the budget market. The tone is clean and American-voiced with a warm, rounded midrange and satisfying tremolo effect that places it squarely in the early-1960s surf and country amp tradition. The 820 is among the more capable and collected of the 800-series Kay models.

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.