Ampeg SVT-2 Pro Power Amp - Main preset

Close · 62/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

A dedicated power amplifier schematic section for the Ampeg SVT-2 Pro, covering the six-tube 6550A output stage and its associated bias, driver, and output transformer circuitry. The SVT-2 Pro power amp section is a class AB push-pull design driving a custom output transformer capable of delivering 300 watts into 2 or 4 ohm loads. This schematic is essential for technicians performing output tube replacement, bias adjustment, or output transformer service on the SVT-2 Pro.

• Years produced: 1991–present
• Made in: USA
• Wattage: 300W
• 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.