What tubes does the Fender Blues Jr use?

The Fender Blues Jr uses 3× 12AX7 preamp tubes and 1× EL84 power tubes.

When was the Fender Blues Jr produced?

The Fender Blues Jr was produced 1995–present.

Fender Blues Jr preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Blues Jr is a shorthand reference for the Blues Junior — Fender's 15-watt, EL84-powered 1×12 combo. Its affordability, warm spring reverb, and satisfying natural breakup have made it one of the most widely owned tube amps in the world.

Years produced: 1995–present
Made in: USA
Wattage: 15W
Channels: 1
Preamp tubes: 3× 12AX7
Power tubes: 1× EL84

Tags: american, clean, breakup, reverb, modern.

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.