Elk Twin Amp 50 - Reverb preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Twin Amp 50 is an Elk valve head with Reverb inputs (Bright) and Normal inputs (Clean), each with its own ECC83 stages, volume, treble and bass. The reverb side drives a spring reverb with its own level and footswitch jack, and an ECC83 vibrato oscillator with speed and intensity has its own footswitch. An ECC85 serves as gain stage and phase inverter for two EL34s, with a GZ34 valve rectifier on about 450 V and a standby switch.

• Made in: Japan
• Channels: 2
• Preamp tubes: 3× ECC83, 1× ECC85
• Power tubes: 2× EL34

Tags: japanese, vintage, reverb, vibrato, two-channel.

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.