What tubes does the Marshall Valvestate 20 8020 - Normal use?

The Marshall Valvestate 20 8020 - Normal uses 1× ECC83 (12AX7) preamp tubes and Solid-state power tubes.

When was the Marshall Valvestate 20 8020 - Normal produced?

The Marshall Valvestate 20 8020 - Normal was produced 1991–2000.

Marshall Valvestate 20 8020 - Normal preset

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

The Marshall Valvestate 20 (model 8020) is a 20W two-channel hybrid combo featuring the signature ECC83 valve preamp stage of the Valvestate family alongside solid-state power amplification. Clean and overdrive channels with independent controls give it practical versatility for home and rehearsal use, and the ECC83 preamp valve provides the harmonic character that separated the Valvestate range from Marshall's purely solid-state G series. At 20W it has enough output for small rehearsal rooms without being impractically loud for home practice.

Years produced: 1991–2000
Made in: UK
Wattage: 20W
Channels: 2
Preamp tubes: 1× ECC83 (12AX7)
Power tubes: Solid-state

Tags: british, crunch.

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.