What tubes does the Ampeg EJ-12A Echo Jet - Main use?

The Ampeg EJ-12A Echo Jet - Main uses 3× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Ampeg EJ-12A Echo Jet - Main produced?

The Ampeg EJ-12A Echo Jet - Main was produced 1961–1965.

Ampeg EJ-12A Echo Jet - Main preset

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

The EJ-12A Echo Jet amp schematic is an alternate documentation source for Ampeg's echo-equipped guitar combo. The Main circuit provides warm 6L6 tone with the atmospheric echo effect characteristic of early 1960s American amplifier design. A companion to the primary EJ-12A schematic.

Years produced: 1961–1965
Made in: USA
Wattage: 15W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6

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

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.