Kay K-506 - Normal preset

Close · 76/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Kay 506 is a small tube combo from Kay's Chicago-built amplifier lineup of the mid-1950s, a step up from the 505 with a slightly larger cabinet and additional tone control. Its single-ended 6V6 output stage delivers approximately 5–8 watts of warm, rounded tone with the characteristic American mid-range presence of Chicago-built tube amplifiers of the era. The 506 was commonly sold alongside Kay's student-grade electric guitars in department stores and instrument shops throughout the Midwest. Its simple circuit and accessible component specification make it an easy amp to restore and maintain today.

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.