Ampeg SVT-100 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The SVT-100 is a 100-watt Ampeg tube bass head of the mid-1980s, built on the same chassis and circuit as the V-5; its factory specification gives 100 watts at 1.5% distortion and 129 watts at 5%. High and low (-6 dB) inputs feed a preamp of three 9-pin dual triodes with pre-volume, bass, midrange, treble, presence and master plus Ultra Hi and Ultra Low switches. Four octal output valves, 6550s, drive an impedance selector.

Tags: american, vintage, 6550, high-wattage, clean.

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.