Fender Musicmaster Bass preset

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

The Musicmaster Bass amp is a small silverface-era Fender combo. One 12AX7A handles both the input stage and a driver stage, with a single Volume (with power switch) and a Tone control. The driver feeds a push-pull interstage transformer that splits the phase for two cathode-biased 6AQ5A output valves, on a silicon-diode supply, rated 12 watts RMS. It is simple and warm, and guitarists sometimes use it as a small, easily driven valve amp.

• Made in: USA
• Wattage: 12W
• Channels: 1
• Preamp tubes: 1× 12AX7A
• Power tubes: 2× 6AQ5A

Tags: american, vintage, silverface, bass, 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.