Carvin MC2800/PB250 Bi-Channel Tube EQ Amp (~1979) - Ch1 preset

Close · 68/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Carvin MC2800/PB250 Bi-Channel Tube EQ Amp (~1979) is a vintage two-channel tube-driven equalizer/preamplifier from Carvin's late-1970s lineup, used in PA and instrument amplification.

• Years produced: 1979
• Made in: USA
• Channels: 2
• Preamp tubes: 12AX7

Tags: american, vintage, clean.

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.