Guyatone GA-1050 Reverb Jazz - Tremolo preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GA-1050 Reverb Jazz is a Guyatone amp from Japan (the drawing covers the GA-1050 and GA-1050S) with Normal and Tremolo channels, two inputs each, and treble, middle, bass, volume and a bright switch on each channel. A 12AT7 drives the spring reverb, with a level control and pedal, and a 12AX7 runs a photocell tremolo with speed, intensity and pedal. A 12AT7 long-tail inverter drives a fixed-bias push-pull pair of 6L6GC tubes.

• Made in: Japan
• Channels: 2
• Preamp tubes: 4× 12AX7, 2× 12AT7
• Power tubes: 2× 6L6GC

Tags: japanese, vintage, clean, reverb, tremolo, 6l6.

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.