What tubes does the Sound City Sound City L B 200 Plus use?

The Sound City Sound City L B 200 Plus uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Sound City Sound City L B 200 Plus produced?

The Sound City Sound City L B 200 Plus was produced 1970–1975.

Sound City Sound City L B 200 Plus preset

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

The Sound City L/B 200 Plus was the most powerful amplifier in the Sound City range, delivering 200 watts for the largest concert applications. Like the smaller L/B models, it was configured for both lead and bass use, making it a versatile centerpiece for a professional rig. The extreme output level meant the amp rarely reached natural power tube saturation, producing a powerful clean foundation ideal for players who wanted pristine tone at high volumes.

Years produced: 1970–1975
Made in: UK
Wattage: 200W
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 4× EL34

Tags: british, 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.