What tubes does the Ampeg J-12A Jet - Tremolo use?

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

When was the Ampeg J-12A Jet - Tremolo produced?

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

Ampeg J-12A Jet - Tremolo preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg J-12A Jet was an updated variant of the original J-12 Jet guitar combo, incorporating circuit refinements made in the early 1960s. Like its predecessor, it delivered clean, sweet 6V6-powered guitar tone in a compact, portable package. The Jet series was Ampeg's affordable guitar combo line, offering quality construction and pleasing tone for players who didn't require the power of larger Gemini models.

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.