Carvin SX 300R Rack Pre-Amp - CH3 preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Carvin SX300R Part 1 is the first schematic page for the SX300R rack-mount guitar preamp system, part of Carvin's direct-sales SX rack series.

• Years produced: 1980s–1990s
• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7

Tags: american, clean, vintage.

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.