What tubes does the Ampeg SVT-2PRO / IIPRO / SVT-CL - Normal use?

The Ampeg SVT-2PRO / IIPRO / SVT-CL - Normal uses 5× 12AX7 preamp tubes and 6× 6550A power tubes.

When was the Ampeg SVT-2PRO / IIPRO / SVT-CL - Normal produced?

The Ampeg SVT-2PRO / IIPRO / SVT-CL - Normal was produced 1991–present.

Ampeg SVT-2PRO / IIPRO / SVT-CL - Normal preset

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

First page of the combined SVT-2 Pro and SVT-CL schematic document, likely covering the preamp and tone stack sections shared by both amplifiers. The SVT preamplifier circuit uses a series of 12AX7 gain stages with a distinctive six-position midrange selector switch and a bass/treble shelving stack that defines the classic SVT tonal signature. Understanding this shared circuit is key to maintaining both the rack-format SVT-2 Pro and the traditional head-format SVT-CL.

Years produced: 1991–present
Made in: USA
Wattage: 300W
Preamp tubes: 5× 12AX7
Power tubes: 6× 6550A

Tags: american.

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.