Gretsch 6155 / 6156 preset

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

The Gretsch G6155 and G6156 are early Gretsch amps sharing one circuit: three inputs into a 6SQ7 triode, followed by a tone control and a volume control. A 6SC7 twin triode adds gain and works as a paraphase inverter, driving a cathode-biased push-pull pair of 6V6GT tubes into a speaker whose 1000-ohm field coil doubles as the filter choke. A 5Y3GT rectifier supplies the power, and there is no negative feedback.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 6SQ7, 1× 6SC7
• Power tubes: 2× 6V6GT

Tags: american, vintage, clean, 6v6.

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.