Ampeg B-1RE / BR1E Bass Preamp - Main preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The B-1RE/BR1E Bass Preamp is a rack-mount solid-state preamp from Ampeg's professional lineup. The Main channel provides Ampeg's characteristic bass tone shaping in a standalone preamp format, designed to drive any power amplifier. A practical tool for building a modular bass rig.

• Years produced: 2000s
• Made in: USA
• Channels: 1

Tags: bass, american, modern, preamp, solid-state.

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.