Fender Musicmaster Bass 6V6 preset

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

This Musicmaster Bass is the version with a push-pull pair of 6V6GTA output tubes. A 12AX7A preamp drives an interstage transformer instead of a conventional phase inverter, and the amp makes about 12 W. It is a simple single-channel practice bass amp that is also popular with guitarists as a small tube amp.

Tags: american, vintage, silverface, bass, 6v6, practice, 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.