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

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

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

The Ampeg Jet J-12-A - Normal was produced 1956–1960.

Ampeg Jet J-12-A - Normal preset

Verified · 83/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Jet J-12-A is among the earliest Ampeg guitar combo models, establishing the Jet series design language. The Normal channel delivers warm late-1950s American guitar tone from 6V6 output tubes. An important historical artifact representing Ampeg's origins as a guitar amplifier manufacturer before bass became the company's primary market.

Years produced: 1956–1960
Made in: USA
Wattage: 12W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

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