Ampeg Jet II J-12T preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg Jet II J-12T is a modern PCB-built tube combo that revives the Jet name. Two 12AX7s and a pair of EL84s provide about 18 watts, with volume, tone, tremolo speed and intensity, op-amp driven reverb and guitar and accordion inputs.

• Wattage: 18W
• Channels: 1
• Preamp tubes: 2× 12AX7
• Power tubes: 2× EL84

Tags: el84, reverb, tremolo, modern, 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.