Gretsch 6159 - Channel 1 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Gretsch G6159 is a two-channel Valco-built amp, closely related to Supro designs of the period; its drawing covers both the G6158 and G6159. Each channel runs on a 12AX7 with its own volume and tone controls. A 12AX7 vibrato oscillator has speed and intensity with a footswitch, and there is no reverb. A 12AX7 gain stage and inverter drive a cathode-biased push-pull pair of 6L6s from a silicon-diode bridge rectifier, with a standby switch.

Tags: american, vintage, clean, reverb, vibrato, 6l6.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.