Mesa Boogie Original Boogie preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The original Mesa Boogie, born from Randall Smith's hot-rodded Fender Princeton, introduced cascading gain stages to the guitar world and defined the sound of smooth, sustain-rich overdrive. Built in Petaluma, California, it launched an entirely new category of amplification and made high-gain tone commercially viable for the first time. Its warm, compressed character and vocal midrange made it the weapon of choice for players who wanted singing lead tone without sacrificing clarity.

• Years produced: 1969–1982
• Made in: USA
• Wattage: 60W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6L6GC

Known for: Carlos Santana, Lowell George, Keith Richards.

Heard on: Europa — Carlos Santana (1976); Willin' — Lowell George (1972).

Tags: american, 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.