Ampeg SVT-200T / SVT-350T preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg SVT-200T and SVT-350T are late-1980s solid-state bass heads. Inputs at 0 and -15 dB feed an op-amp preamp with gain, a five-band active EQ with Ultra Low and Ultra High switches, an effects send and return, and a stage volume with a pull-to-defeat limiter and peak/limit LEDs. A bi-amp crossover with frequency and balance controls feeds low- and high-frequency outputs, alongside balanced and unbalanced line outs, ahead of a bipolar transistor power amp.

Tags: american, bass, solid-state, 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.