DIY Plexi 6V6 - Bright preset

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

The Plexi 6V6 is a DIY amplifier design that combines Marshall Plexi circuit topology with American 6V6 output tubes instead of the traditional EL34s. This hybrid approach yields a tighter, more compressed character with American power tube warmth while retaining the Plexi's gain structure and voicing. It is a popular DIY project for players who want British-style crunch at lower wattage.

• Made in: USA
• Channels: 1
• Preamp tubes: 2× 12AX7
• Power tubes: 2× 6V6

Tags: american, british, vintage, 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.