What tubes does the Music Man Rd50B use?

The Music Man Rd50B uses 2× 12AX7 preamp tubes and 2× 6CA4 power tubes.

When was the Music Man Rd50B produced?

The Music Man Rd50B was produced 1974–1982.

Music Man Rd50B preset

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

The Music Man RD-50B was a hybrid combo amp featuring a tube preamp stage and a solid-state power section delivering 50 watts, designed with the clean, versatile tone philosophy that Leo Fender brought to the Music Man brand. It offered excellent reverb and was popular with country and pop players seeking a reliable, modern-voiced amp.

Years produced: 1974–1982
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.