Ampeg B80N preset

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

The Ampeg B80N is a 1983 solid-state bass amp from the Music Technology Inc. era. Hi and Lo inputs feed a JFET stage and a passive tone network with Treble, Bass and Mid plus a bright switch, then Volume and a second JFET stage. A line out with a pre/post switch taps the preamp, and discrete transistor drivers feed a complementary output stage into an 8-ohm speaker, with extension speaker and headphone jacks.

• Made in: USA
• Wattage: 80W
• 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.