AIMS VTB-120 Producer - Channel 1 preset

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

The AIMS VTB-120 Producer is a tube bass head built in Phoenix, Arizona, drawn in 1972. It has two channels, each with two inputs and a 7025 gain stage: the first has Bass, Treble, a Bright switch and Volume; the second adds a Middle control to its Bass and Treble plus its own Volume. A further 7025 stage mixes the channels and feeds a 12AT7 phase inverter driving a push-pull pair of 6550s, with negative feedback and a solid-state rectifier.

• Made in: USA
• Wattage: 120W
• Channels: 2
• Preamp tubes: 3× 7025, 1× 12AT7
• Power tubes: 2× 6550

Tags: american, bass, 6550, high-wattage, vintage.

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.