Ampeg Echo Twin ET-1B preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg Echo Twin ET-1B is a stereo tube combo with independent left and right channels. 6SL7 preamp and phase inverter stages feed two push-pull pairs of 7591s, with tremolo and a Hammond-licensed echo (reverb) unit.

• Made in: USA
• Wattage: 40W
• Channels: 1
• Preamp tubes: 4× 6SL7
• Power tubes: 4× 7591

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