Masco MA-35N preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Masco MA-35N is a 35-watt tube PA amplifier with three microphone inputs and a phono input. Each mic input has its own 6J7 pentode stage and volume control; they share the tone circuit and a push-pull pair of 6L6G output tubes. All three mic inputs use the same circuit, so it has one voice: an early octal-tube design that players now use as a clean guitar amp.

• Made in: USA
• Wattage: 35W
• Channels: 1
• Preamp tubes: 3× 6J7, 1× 6SC7, 3× 6SN7
• Power tubes: 2× 6L6G

Tags: american, vintage, 6l6, 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.