What tubes does the Ampeg J 12 1 use?

The Ampeg J 12 1 uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Ampeg J 12 1 produced?

The Ampeg J 12 1 was produced 1958–1962.

Ampeg J 12 1 preset

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

Alternate schematic document for the original Ampeg J-12 Jet guitar combo. The J-12 was one of Ampeg's earliest guitar amplifier offerings, establishing the compact, practical Jet series format that would continue through the 1960s. Its 6V6 output tubes and 12-inch speaker delivered the sweet, clean American tones that defined Ampeg's guitar amplifier character throughout the era.

Years produced: 1958–1962
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.