Ampeg VT-120 - Clean preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The SLM-era VT-120 is a 120-watt all-tube guitar amp with four 6L6GC output tubes, a triode/pentode switch and a 60/120W half-power switch. Its two footswitched channels are switched by JFETs and LDRs: a clean channel with its own treble, bass, pull bass, gain and level, and an overdrive channel with treble, bass and mid, gain B, a higher-gain C mode and its own level. Pull bright, Ultra Mid, 12AU7 reverb and an effects loop complete it.

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

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.