Peavey MicroBass preset

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

The Peavey MicroBass is a small solid-state bass practice amp from 1987. A single input feeds a 4558 op-amp stage with a Preamp Gain control, then High, Mid and Low tone controls and a second op-amp stage with a subsonic filter. A TDA2040 power IC drives a 4-ohm speaker, with a clip-sensing limiter that pulls the gain back before the output distorts, and a headphone jack that mutes the speaker for silent practice.

• Made in: USA
• Channels: 1

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