Peavey JSX - Crunch preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Peavey JSX is Joe Satriani's 120-watt signature head. It has three channels, Clean, Crunch and Ultra, each with its own three-band EQ and volume, plus diode-clipped 'Fat' switches, a noise gate and an effects loop. The four power tubes can run EL34 or 6L6GC through a bias switch.

• Made in: USA
• Wattage: 120W
• Channels: 3
• Preamp tubes: 4× 12AX7
• Power tubes: 4× EL34

Known for: Joe Satriani.

Heard on: If I Could Fly — Joe Satriani (2004).

Tags: american, modern, clean, high-gain, el34, multi-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.