Newcomb Pathfinder E-10B preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Newcomb Pathfinder E-10B is a small tube public-address amplifier. Its microphone input (through an input transformer) and phono input feed a 6AU6 and a 12AX7, which drive a push-pull pair of 6V6s with a 6X4 rectifier. Outputs are provided for 4, 8 and 16 ohms and for 25 V line. Players have used PA amps like this as simple, warm-sounding guitar amps.

• Made in: USA
• Wattage: 10W
• Channels: 1
• Preamp tubes: 1× 6AU6, 1× 12AX7
• Power tubes: 2× 6V6

Tags: american, vintage, 6v6, low-wattage.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.