Hagstrom 620 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Hagstrom 620 was a step up from the 614 in the brand's numbered solid-state combo series, offering additional wattage and a slightly more developed EQ section. Its circuit produced a clean, punchy tone suited to rhythm and lead playing in small venue contexts. The 620 was designed to appeal to the working musician in European markets who needed a dependable amp at a reasonable price. It shared the honest, utilitarian character common to all Hagstrom amplifier designs of this period.

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.