Ampeg V-4BH preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The V-4BH is a later all-tube Ampeg bass head in the V-4B tradition, with four 6L6GC output tubes in class AB push-pull for about 100 watts. The schematic shows 12AX7 and 12AU7 driver stages, a solid-state bridge rectifier with standby, slave output and an impedance selector. It aims at the classic V-4B character: warm, round and punchy.

• Made in: USA
• Wattage: 100W
• Channels: 1
• Power tubes: 4× 6L6GC

Tags: american, bass, high-wattage, 6l6, reissue.

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.