Mesa Boogie Road King II - Channel 4 preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Road King II is a four-channel, 120-watt Mesa/Boogie Rectifier head. Channels 1 and 2 offer Clean, Fat, Tweed or Brit modes and channels 3 and 4 Raw, Vintage or Modern high gain, each with its own controls. Six output valves (four 6L6s and two EL34s) can be combined in five ways for 50, 100 or 120 watts, with valve or silicon rectification chosen per channel, two effects loops and a built-in speaker switcher.

Tags: american, high-gain, metal, 6l6, el34, high-wattage, multi-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.