Ampeg V-4 / VT-22 - Channel 1 preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The V-4 head and its VT-22 2x12 combo sibling share one 100-watt chassis driving four 7027A (6L6-type) output tubes from a silicon-rectified ~540V supply. Two channels each have Ultra Lo/Ultra Hi voicing switches, feeding a bass/treble stack with Ampeg's selectable-frequency midrange control and tube-driven reverb. The result is a loud, clean, full-range American voice with plenty of headroom.

• Made in: USA
• Wattage: 100W
• Channels: 2
• Preamp tubes: 3× 12AX7, 1× 12DW7, 1× 12AU7, 1× 6K11, 1× 6CG7
• Power tubes: 4× 7027A

Known for: Joe Perry, Jeff "Skunk" Baxter, Mick Taylor, Robert DeLeo.

Heard on: My Old School — Steely Dan (1973); Dream On — Aerosmith (1973).

Tags: american, vintage, high-wattage, 6l6, reverb, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.