What tubes does the Groove Tubes Studio 22 Preamp use?

The Groove Tubes Studio 22 Preamp uses 1× 12AX7 preamp tubes.

When was the Groove Tubes Studio 22 Preamp produced?

The Groove Tubes Studio 22 Preamp was produced 1987.

Groove Tubes Studio 22 Preamp preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Studio 22 is a 1987 rack guitar preamp from Groove Tubes' electronics division. One 12AX7 handles the input and output stages, and op-amps in between provide gain, a threshold control, a four-band EQ and an 'aural enhance' circuit. Outputs include XLR and line feeds plus a master level for driving a power amp. It is a hybrid tube and op-amp design for direct recording.

Years produced: 1987
Made in: USA
Channels: 1
Preamp tubes: 1× 12AX7

Tags: american, preamp, hybrid, modern.

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.