What tubes does the Sound City Sound City 120W Slave use?

The Sound City Sound City 120W Slave uses 1× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Sound City Sound City 120W Slave produced?

The Sound City Sound City 120W Slave was produced 1970–1975.

Sound City Sound City 120W Slave preset

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

The Sound City 120W Slave was a power amplifier designed to be driven by a separate preamp or main amp head, expanding the output capabilities of a rig without adding a full second channel. It was a practical solution for touring musicians who needed backup power or wanted to drive multiple speaker cabinets. The all-tube design ensured the slave maintained the same British character as the primary amplifier.

Years produced: 1970–1975
Made in: UK
Wattage: 120W
Channels: 1
Preamp tubes: 1× ECC83
Power tubes: 4× EL34

Tags: british, vintage.

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.