Ampeg SVT Preamp Section (R version, 1972) - Channel One preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

An alternate or additional SVT preamp schematic document, potentially from a different production era or representing a revised preamp board layout from the classic Ampeg SVT series. The SVT preamp topology remained fundamentally consistent across its decades of production, though component values and board layouts were revised multiple times. This document provides additional preamp circuit detail for technicians working on SVT units across different production years.

• Made in: USA
• Preamp tubes: 6× 12AX7, 2× 12DW7

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.