Marshall Lead 12 3005 / 5005 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Lead 12 (5005 combo, 3005 mini-head) is a 12-watt solid-state Marshall with a 1458 op-amp preamp (gain, treble, middle, bass) and a complementary transistor power amp. Its preamp voice is well regarded for its size.

• Made in: UK
• Wattage: 12W
• Channels: 1

Tags: british, solid-state, low-wattage, practice, 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.