What tubes does the Music Man Rd50A use?

The Music Man Rd50A uses 2× 12AX7 preamp tubes and 2× 6CA4 power tubes.

When was the Music Man Rd50A produced?

The Music Man Rd50A was produced 1974–1979.

Music Man Rd50A preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Music Man RD-50A was the first version of Music Man's popular 50-watt combo, establishing the clean American tone and reliable hybrid circuit that would define the brand. Leo Fender's design input ensured the amp delivered the articulate, crystalline clean tones he had perfected at Fender.

Years produced: 1974–1979
Made in: US
Wattage: 50W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6CA4

Tags: american, vintage, 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.