Engl Retro Tube 50 E768 - Lead preset

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

The E768 is the reverb version of ENGL's Retro Tube 50. It shares the two-channel ECC83 preamp of the E762/E765, with relay-switched Channel 1 and Channel 2 each having their own gain, EQ and volume, an effects loop with dry/wet balance and two masters. The added spring reverb is driven and recovered by op-amp stages rather than a valve. The file shows only the preamp sheet; the four-EL34 power amp is shared with the E762.

• Made in: Germany
• Wattage: 50W
• Channels: 2
• Preamp tubes: ECC83
• Power tubes: 4× EL34

Tags: german, el34, two-channel, reverb, 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.