Ampeg BT-25 / BT-25L / BT-140 - Channel 1 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg BT-25, BT-25L and BT-140 are solid-state bass amps sharing one transistor circuit. Two channels each have normal and bright inputs, an Ultra-Lo switch, bass, treble and volume, feeding a common solid-state power amp.

• Made in: USA
• Channels: 2

Tags: american, bass, solid-state, 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.