What tubes does the Laney Pb400 use?

The Laney Pb400 uses 2× ECC83 preamp tubes and Solid state power section power tubes.

When was the Laney Pb400 produced?

The Laney Pb400 was produced 1990s–2000s.

Laney Pb400 preset

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

The Laney PB400 is a high-powered bass amplifier head combining a tube preamp with a solid-state 400W power section. Designed for the bass market, it delivers warm tube preamp character with reliable, high-output power. Note: bass amplifier.

Years produced: 1990s–2000s
Made in: UK
Wattage: 400W
Channels: 2
Preamp tubes: 2× ECC83
Power tubes: Solid state power section

Tags: bass, hybrid, british, high-wattage.

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.