Kay 771 - Normal preset

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

The Kay 771 (partial schematic) is a mid-1960s tube amplifier from Kay's Chicago lineup, known from an incomplete schematic that nonetheless reveals a 6L6-based push-pull power section with a multi-stage preamp. The partial schematic indicates a reverb circuit was included, placing it among Kay's more feature-complete models of the period. Its basic tonal character aligns with the American-voiced clean sound characteristic of Kay's amplifier line, with the reverb adding usable depth and space. The incomplete documentation makes precise circuit details uncertain, but its approximate specification places it in the 25–35 watt class.

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.