Fender Princeton Reverb (Boost Pedal) preset

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

This is a late silverface Princeton Reverb with a volume boost, worked by a push-pull switch on the Volume pot or a Boost footswitch that changes the mixing network ahead of the second gain stage; it adds no extra valve. The single channel has Volume, Treble and Bass, a 12AT7-driven spring reverb, and a 7025 bias-modulating vibrato with Speed and Intensity. A 7025 split-load inverter drives two 6V6GTAs on a 5U4GB rectifier, rated 12 watts.

• Made in: USA
• Wattage: 12W
• Channels: 1
• Preamp tubes: 3× 7025, 1× 12AT7
• Power tubes: 2× 6V6GTA

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

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.