Ampeg V-6B preset

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

The V-6B is a solid-state Ampeg bass amplifier from 1974, not a tube design. Two inputs feed a 4739 op-amp preamp with volume, bass, treble and a midrange control whose three-position switch picks 300 Hz, 800 Hz or 3 kHz on a tapped inductor, plus an Ultra Hi switch. A discrete power amp with eight 2N4348 output transistors on plus and minus 56.5-volt rails is specified for at least 240 watts RMS into a 4-ohm minimum load.

• Made in: USA
• Wattage: 240W
• 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.