What tubes does the Music Man Music Man Bb 3 (150W) use?

The Music Man Music Man Bb 3 (150W) uses 2× 12AX7 preamp tubes.

When was the Music Man Music Man Bb 3 (150W) produced?

The Music Man Music Man Bb 3 (150W) was produced 1976–1982.

Music Man Music Man Bb 3 (150W) preset

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

The Music Man BB-3 (150W) was a high-powered bass amplifier in Music Man's professional line, designed to deliver clean, articulate bass amplification at maximum volume. Its tube preamp provided warmth and character while the solid-state power section ensured headroom and reliability.

Years produced: 1976–1982
Made in: US
Wattage: 150W
Channels: 2
Preamp tubes: 2× 12AX7

Tags: american, vintage, bass, 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.