Ampeg BA-108 preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg BA-108 is a small solid-state bass practice combo. An NJM4558 op-amp preamp with active bass, middle and treble drives a class AB transistor power stage into a 10-inch speaker, with an effects loop, CD input and headphone output.

• Wattage: 25W
• Channels: 1

Tags: american, bass, solid-state, practice, mid-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.