Ampeg B-1RE preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg B-1RE is a mid-2000s solid-state rack bass head from Ampeg's St. Louis Music era. Its TL072 op-amp preamp has a balanced input with a -12 dB pad, a Gain control and a sweepable Mid control with Bass and Treble, then a Master. An effects send and return, a preamp out and a switchable limiter with LED sit between the preamp and the power amp, and peak and power indicators complete the panel.

• Years produced: 2005–2010
• Made in: USA
• Wattage: 300W
• Channels: 1

Tags: american, bass, solid-state, high-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.