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

The Ampeg J-12R - Normal uses 3× 12AX7 preamp tubes and 2× 6V6 power tubes.

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

The Ampeg J-12R - Normal was produced 1963–1967.

Ampeg J-12R - Normal preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Ampeg J-12R Diamond Blue was a cosmetically distinctive variant of the J-12R Jet combo with reverb, featuring the Diamond Blue tolex covering. The Diamond Blue finish was one of Ampeg's premium cosmetic options during the mid-1960s, giving the amp a distinctive appearance while sharing the same functional circuit as the standard J-12R. It remains particularly collectible today due to its rare and attractive cosmetics.

Years produced: 1963–1967
Made in: USA
Wattage: 15W
Channels: 2
Preamp tubes: 3× 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.