Guild 99-J - Microphone preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

A Guild combo with an instrument input group and a mic/accessory input group, each with its own volume, sharing treble and bass. It has 12AX7 tremolo with a footswitch, a 12AX7 inverter, and two 6L6GTs with a 5AR4 rectifier, for about 30 watts. It is the larger member of Guild's early amp line.

• Made in: USA
• Wattage: 30W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6L6GT

Tags: american, vintage, 6l6, tremolo, two-channel, mid-wattage.

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.