Fender Princeton Reverb B1270 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The B1270 is a silverface Princeton Reverb from around 1970. It keeps the blackface-era layout of one channel with tube-driven spring reverb and tremolo, and a pair of 6V6GTs on a 5U4GB rectifier for about 12 watts. Its sweet cleans, early breakup and deep reverb make it a studio favorite.

• Made in: USA
• Wattage: 12W
• Channels: 1
• Preamp tubes: 1× 7025, 2× 12AX7A, 1× 12AT7
• Power tubes: 2× 6V6GTA

Tags: american, vintage, silverface, reverb, tremolo, 6v6, low-wattage.

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.