What tubes does the Sound City Sound City Bass150 use?

The Sound City Sound City Bass150 uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Sound City Sound City Bass150 produced?

The Sound City Sound City Bass150 was produced 1970–1975.

Sound City Sound City Bass150 preset

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

The Sound City Bass 150 was specifically voiced for bass guitar, offering 150 watts of clean headroom before breakup with an extended low-frequency response. Like other Sound City designs, it benefited from Jim Marshall's transformer expertise, resulting in a tight, punchy low-end that was well-regarded by professional bassists of the era. The all-tube design imparts a warmth and musicality to bass tones that solid-state alternatives of the period could not match.

Years produced: 1970–1975
Made in: UK
Wattage: 150W
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 4× EL34

Tags: british, vintage, bass.

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.