Masco MAP-120N preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Masco MAP-120N is a small 1940s American tube musical instrument amplifier. Two inputs are mixed into one volume and one tone control, with 6SL7GT preamp and phase-splitter stages feeding a push-pull pair of 6V6GTs and a 5Y3GT rectifier. Its octal tubes give a warm, simple early-tube tone.

• Made in: USA
• Wattage: 10W
• Channels: 1
• Preamp tubes: 2× 6SL7GT
• Power tubes: 2× 6V6GT

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.