Marshall Artist 3203 - Boost preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Artist 3203 is a 30-watt hybrid head from Marshall's mid-1980s Artist range, sharing its circuit with the 4203 combo. An op-amp preamp offers a footswitchable Normal channel and a Boost channel with LED clipping, each with its own controls, plus spring reverb and an effects loop. An ECC83 phase inverter drives two EL34s for 30 watts RMS into 4 or 8 ohms, with a direct output.

• Made in: UK
• Wattage: 30W
• Channels: 2
• Preamp tubes: 1× ECC83
• Power tubes: 2× EL34

Tags: british, crunch, reverb, mid-wattage, two-channel.

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.