Engl E350 - Lo Gain preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The E350 is a 50-watt ENGL head with Lo Gain and Hi Gain channels. One input feeds an ECC83 stage, then relay switching selects the Lo Gain or Hi Gain path, each with its own gain control, bright switch and depth switch, into a shared treble, bass and middle stack and separate Lo and Hi Gain volumes. An Accutronics spring reverb, an effects loop with balance control and an ECC83 long-tailed-pair inverter feed a pair of adjustable-bias 5881s.

• Made in: Germany
• Wattage: 50W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× 5881

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.