Guild Thunderbass - Normal preset

Close · 74/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Thunderbass (T-Bass) is a Guild bass amplifier with two channels, Normal and Bass, each with two inputs, a two-stage 12AX7 preamp and its own treble, bass and volume controls. A master volume follows the mix, then a 7247 gain stage and long-tail phase inverter drive a fixed-bias push-pull pair of 6L6GC output tubes with individual bias adjustments and feedback from the speaker, on a solid-state rectifier.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7, 1× 7247
• Power tubes: 2× 6L6GC

Tags: american, vintage, bass.

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.