What tubes does the Ampeg V 4 use?

The Ampeg V 4 uses 4× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Ampeg V 4 produced?

The Ampeg V 4 was produced 1971–1980.

Ampeg V 4 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg V-4 is a 100-watt all-tube amplifier used across bass, guitar, and PA applications. Two channels with a mid-frequency selector, ultra-hi and ultra-lo switches provide exceptional tonal flexibility. The four-6L6 output section delivers American-voiced clean headroom with natural tube warmth across the entire power range.

Years produced: 1971–1980
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 4× 12AX7
Power tubes: 4× 6L6

Tags: american, vintage, mid-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.