Sunn Sonic I40 preset

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

The Sunn Sonic i40 is a 40-watt solid-state practice and small-venue amplifier, representing Sunn's lower-end transistor product aimed at students and amateur players who wanted a reliable, maintenance-free instrument. Its solid-state design provides consistent operation without the warm-up time or periodic retubing of valve amplifiers, and at 40 watts it delivers sufficient output for home use and small rehearsal rooms. The Sonic i40 brought Sunn's brand recognition and construction quality into an accessible price segment during the mid-to-late 1970s.

Tags: american, clean, classic.

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.