Kay K-505 - Channel 1 preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Kay K-505 is a simple all-tube combo. Two pairs of inputs each feed their own volume control and one half of a 12AX7, whose outputs mix into a 12AU7 that amplifies and splits the phase for a push-pull pair of cathode-biased 6V6s. A tone control works as a treble cut across the output tubes, and a 5Y3 rectifier with a standby switch powers it, driving two speakers. It gives a warm, direct sound with a thick breakup when turned up.

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

Tags: american, vintage, 6v6, breakup, 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.