Sunn 300T - Channel 1 preset

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

The Sunn 300T is a Fender-era (late 1990s) bass head rated at 300 watts RMS into 2, 4 or 8 ohms. Channel one is a fairly conventional 12AX7 stage; channel two adds a second 12AX7 and op-amp gain for a 60s-style overdrive, and a footswitchable selector picks channel one alone or a blend of both via JFET switching. Low-boost, mid-notch and high-boost switches, Baxandall bass and treble, a footswitchable 10-band graphic EQ and a two-band compressor follow. A further 12AX7 and a 12AT7 drive six 6550Cs, with per-pair fault LEDs.

Tags: american, bass, 6550, hybrid, two-channel, high-wattage.

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.