What tubes does the Ampeg ET-1 Echo Twin - Right use?

The Ampeg ET-1 Echo Twin - Right uses 4× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Ampeg ET-1 Echo Twin - Right produced?

The Ampeg ET-1 Echo Twin - Right was produced 1961–1965.

Ampeg ET-1 Echo Twin - Right preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The ET-1 Echo Twin Left channel schematic documents the primary amplifier section of Ampeg's stereo echo guitar combo. A clean 6L6 output stage drives the left speaker while the echo circuit feeds the right. An alternate schematic for the ET-1 Echo Twin, providing comprehensive circuit documentation.

Years produced: 1961–1965
Made in: USA
Wattage: 30W
Channels: 2
Preamp tubes: 4× 12AX7
Power tubes: 2× 6L6

Tags: guitar, american, vintage, low-wattage, reverb, clean, stereo.

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.