Kay K-506 preset

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

The Kay K-506 is a K-505-type combo with built-in vibrato (tremolo). The inputs feed volume controls and a 12AU7 first stage, then a tone control and a 12AX7 that amplifies and splits the phase for two cathode-biased 6V6s, with a 5Y3 rectifier and an 8-ohm speaker. A second 12AX7 runs a phase-shift oscillator with a speed control (its switch turns the effect on) and a footswitch jack. Warm and direct, thick when pushed.

• Made in: USA
• Wattage: 12W
• Channels: 1
• Preamp tubes: 1× 12AU7, 2× 12AX7
• Power tubes: 2× 6V6

Tags: american, vintage, 6v6, tremolo.

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.