What tubes does the Ampeg J-12A - Normal use?

The Ampeg J-12A - Normal uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Ampeg J-12A - Normal produced?

The Ampeg J-12A - Normal was produced 1959–1963.

Ampeg J-12A - Normal preset

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

Alternate schematic document for the Ampeg J-12A Jet guitar combo. The J-12A represents the first major revision of the original Jet, refining the circuit while maintaining the compact, 6V6-powered character that made the Jet series accessible and appealing to the working guitarist of the early 1960s.

Years produced: 1959–1963
Made in: USA
Wattage: 12W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: american, vintage, 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.