Ampeg SVT-450H Bass Preamp - Main preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The SVT-450H is a solid-state bass head with an SVT-inspired tube preamp section delivering 450 watts. The Main preamp board provides the tone-shaping and gain control that feeds the high-powered solid-state output section. A practical touring head combining Ampeg's tube preamp character with solid-state reliability and power.

• Years produced: 2000s
• Made in: USA
• Wattage: 450W
• Channels: 1

Tags: bass, american, modern, high-wattage, solid-state.

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.