What tubes does the Guild T-Bass 2 Tube Preamp use?

The Guild T-Bass 2 Tube Preamp uses 2× 12AX7 preamp tubes.

When was the Guild T-Bass 2 Tube Preamp produced?

The Guild T-Bass 2 Tube Preamp was produced 1970–1978.

Guild T-Bass 2 Tube Preamp preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Guild T-Bass 2 Tube Preamp was designed to provide warm, harmonically rich tube preamplification for bass guitar. Guild's tube bass preamps were valued for their natural compression and the organic quality they imparted to bass tone.

Years produced: 1970–1978
Made in: USA
Channels: 1
Preamp tubes: 2× 12AX7

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.