What tubes does the Ampeg SVP-BSP - Clean use?

The Ampeg SVP-BSP - Clean uses 1× 12AX7 preamp tubes.

When was the Ampeg SVP-BSP - Clean produced?

The Ampeg SVP-BSP - Clean was produced 1999–2005.

Ampeg SVP-BSP - Clean preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg SVP-BSP is a hybrid rack bass preamp with one 12AX7 and extensive op-amp circuitry. The clean channel has gain, bass, mid with frequency, treble, compressor and gate; the overdrive channel adds its own gain and level. It has balanced transformer XLR outputs, an effects loop and a tuner out.

Years produced: 1999–2005
Channels: 2
Preamp tubes: 1× 12AX7

Tags: american, bass, preamp, hybrid, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.