What tubes does the Ampeg GVT15-112 / GVT15H use?

The Ampeg GVT15-112 / GVT15H uses 2× 12AX7 preamp tubes and 2× 6V6 power tubes.

When was the Ampeg GVT15-112 / GVT15H produced?

The Ampeg GVT15-112 / GVT15H was produced 2011–2019.

Ampeg GVT15-112 / GVT15H preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg GVT15 (112 combo and head), drawn in 2011, is a 15-watt single-channel tube amp. One 12AX7 handles the gain stages and a second is the long-tail phase inverter for a push-pull pair of 6V6s. The front panel has gain, midrange, bass, treble, volume and reverb. Op-amp-driven spring reverb and an effects loop can each be bypassed by relay from a footswitch, and the standby switch picks full or half power, with 4, 8 and 16 ohm outputs.

Years produced: 2011–2019
Wattage: 15W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 2× 6V6

Tags: modern, 6v6, reverb, low-wattage.

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.