Ampeg Echo Twin ET-1 - Echo preset

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

The Ampeg Echo Twin ET-1 is a stereo guitar combo with mirror-image left and right amplifiers and a built-in echo unit. Each side has a 6SL7 preamp with volume, tone and tremolo speed and intensity, driving its own 6V6 output pair off its own 5Y3 rectifier.

• Made in: USA
• Wattage: 30W
• Channels: 2
• Preamp tubes: 4× 6SL7
• Power tubes: 4× 6V6

Known for: Peter Frampton.

Tags: american, vintage, 6v6, stereo, reverb, tremolo.

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.