Engl E768 Reverb Circuit Retro Tube preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

Reverb circuit sub-schematic for the ENGL Retro Tube E768. Documents the spring reverb driver and recovery stage used in the ENGL Retro Tube series vintage-voiced amplifiers.

• Years produced: 1990s–2000s
• Made in: Germany
• Preamp tubes: ECC83

Tags: german, reverb, sub-circuit, vintage-voiced.

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.