Ampeg B-5R / B-4R Bass Amp - Channel A preset
Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.
The Ampeg B-5R was a high-powered solid-state bass head from the late 1990s, delivering 500 watts and housed in a 2U rack-mount chassis. Aimed at professional touring bassists who needed massive headroom without tube maintenance, the B-5R featured Ampeg's signature EQ voicing and a clean, punchy solid-state tone. It was part of Ampeg's effort to capture the professional bass market with reliable solid-state alternatives to their tube heads during the 1990s.
- Years produced: 1996–2002
- Made in: USA
- Wattage: 500W
- Channels: 1
- Preamp tubes: Solid-state
- Power tubes: Solid-state
Tags: american, classic.
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.