Ampeg SVP-BSP Bass Preamp - Clean preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Ampeg SVP-BSP (Bass Signal Processor) was a rack-mount tube preamp and signal processing unit designed for professional bass players seeking Ampeg's classic SVT tube tone in a modular format. It featured two channels — a clean channel based on the SVT preamp topology and a distortion channel for overdriven bass tones — along with effects send/return loops. The SVP-BSP was developed in collaboration with Billy Sheehan of Mr. Big, whose signature heavy rock bass tone influenced its overdrive and distortion voicing.

• Years produced: 1993–1998
• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7

Known for: Billy Sheehan.

Tags: american.

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.