What tubes does the Fender Bassman 50 - Normal use?

The Fender Bassman 50 - Normal uses 3× 7025, 1× 12AT7 preamp tubes and 2× 6L6GC power tubes.

When was the Fender Bassman 50 - Normal produced?

The Fender Bassman 50 - Normal was produced 1972–1977.

Fender Bassman 50 - Normal preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bassman 50 is a silverface-era 50-watt bass head. A Bass Instrument channel with a Deep switch and a blackface-style Normal channel are mixed into another 7025 gain stage, then a 12AT7 long-tail phase inverter drives two fixed-bias 6L6GCs on a silicon rectifier. It is clean and punchy, and guitarists also use it as a clean platform.

Years produced: 1972–1977
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 3× 7025, 1× 12AT7
Power tubes: 2× 6L6GC

Tags: american, vintage, silverface, bass, 6l6, two-channel.

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.