What tubes does the Rickenbacker B9A use?

The Rickenbacker B9A uses 2× 7025 preamp tubes and 1× 6V6 power tubes.

When was the Rickenbacker B9A produced?

The Rickenbacker B9A was produced 1964–1975.

Rickenbacker B9A preset

verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Rickenbacker B9A is a small single-ended tube amp. Four inputs are mixed through 68K resistors into one triode of a 7025, followed by 500K Tone and Volume controls and a second 7025 triode that drives a single cathode-biased 6V6 into the output transformer. A second 7025 is a phase-shift tremolo oscillator with Speed and Depth controls and a footswitch. A 5Y3 rectifier feeds the supply, and there is no negative feedback.

Years produced: 1964–1975
Made in: USA
Channels: 1
Preamp tubes: 2× 7025
Power tubes: 1× 6V6

Tags: american, vintage, tremolo, 6v6.

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.