Jet City JCA22H - Overdrive preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Jet City JCA22H is a compact 20-watt, two-channel tube head from Jet City Amplification, the budget line developed with input from Mike Soldano. Relay-switched Normal and Overdrive channels each have their own gain and volume, with Overdrive adding extra 12AX7 stages, and both share treble, middle and bass. An effects loop, presence and a 12AX7 inverter feed two EL84s with adjustable bias, with 4, 8 and 16-ohm outputs and a footswitch.

• Wattage: 20W
• Channels: 2
• Preamp tubes: 5× 12AX7
• Power tubes: 2× EL84

Tags: modern, high-gain, low-wattage, two-channel.

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.