Ampeg V3 Power Amplifier (1970) - Main preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg V-3 power amplifier section used four 6L6GC output tubes in a push-pull class AB configuration to produce approximately 60–75 watts, positioned between the V-2 and V-4 in Ampeg's 1970s V-series guitar amplifier range. The V-3 power amp circuit featured a fixed-bias design with individual bias adjustment for each pair of output tubes, allowing careful matched-tube operation. The 6L6GC tubes gave the V-3 the warm, rounded American guitar tone associated with Ampeg's guitar amplification line of the early 1970s.

Tags: american.

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.