Ampeg Echo Jet EJ-12D preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg Echo Jet EJ-12-D is a guitar combo with a built-in footswitchable echo unit. A 6BK11 compactron preamp with volume and tone drives a push-pull pair of 7591s off a solid-state rectifier.

• Made in: USA
• Wattage: 20W
• Channels: 1
• Preamp tubes: 1× 6BK11
• Power tubes: 2× 7591

Tags: american, vintage, reverb.

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.