Gretsch 6150 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Gretsch 6150 is a small Valco-built student amp sold under the Gretsch name. Three inputs feed both halves of a 12AX7, with a single volume control between the stages and a fixed treble-bleed capacitor network but no tone control. The second stage drives a single-ended, cathode-biased 6V6GT with no negative feedback into one 8-inch speaker, and a 5Y3GT rectifier supplies the power, for a few watts that break up readily.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 12AX7
• Power tubes: 1× 6V6GT

Tags: american, vintage, low-wattage, practice, 6v6, class-a.

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.