What tubes does the Fender Bassman 70 1 use?

The Fender Bassman 70 1 uses 3× 12AX7 preamp tubes and 2× 6L6GC power tubes.

When was the Fender Bassman 70 1 produced?

The Fender Bassman 70 1 was produced 1977–1983.

Fender Bassman 70 1 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Fender Bassman 70 is a late-silverface/early-CBS-transition bass head producing 70 watts with a master volume control — a feature that arrived on Fender amplifiers from the mid-1970s onward. Two channels and a solid, clean low-end response made it popular with working bassists. From a guitar perspective it represents the pragmatic, no-nonsense side of Fender's CBS-era lineup.

Years produced: 1977–1983
Made in: USA
Wattage: 70W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 2× 6L6GC

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.