What tubes does the Fender Princeton 5B2 use?

The Fender Princeton 5B2 uses 1× 12AX7 preamp tubes and 1× 6V6GT (plus 5Y3 rectifier) power tubes.

When was the Fender Princeton 5B2 produced?

The Fender Princeton 5B2 was produced 1953–1954.

Fender Princeton 5B2 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Princeton 5B2 is an early tweed-era single-ended design running just four watts from a single 6V6 output tube. This ultra-simple circuit produces the characteristic warmth and bloom of single-ended operation, with even-order harmonic distortion that gives the tone a pleasing musical quality even at full saturation. The 5B2 represents the Princeton in its earliest production form — a basic, stripped-down amplifier for students and practice use. At low volumes it is clean and clear; pushed to the limit it produces creamy, natural breakup with the soft clipping and compression that defines the single-ended tweed voice. This is the schematic for the 5B2.

Years produced: 1953–1954
Made in: USA
Wattage: 4W
Channels: 1
Preamp tubes: 1× 12AX7
Power tubes: 1× 6V6GT (plus 5Y3 rectifier)

Tags: american, 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.