Vox Q-Series Bass 100 preset

Close · 65/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

This is the first schematic document for the Vox QS (Quadraphonic/Quick Silver) Bass amplifier, covering one section of the bass amplifier circuit. The QS series was part of Vox's 1970s solid-state product expansion. The bass-specific circuit features a tone stack optimised for low-frequency content and a transistor output stage.

• Years produced: 1972–1976
• Made in: UK
• Channels: 1

Tags: british.

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.