Calsel C12W preset

verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Calsel C12W is a small vintage tube combo for 220 V mains. Two inputs feed the triode of a 6AV6, then a passive bass ('Bajos') and treble ('Altos') network and a volume control. Two ECL82 triode-pentodes do all the rest: one triode is a further gain stage, the other a floating paraphase inverter, and the two pentode sections run push-pull with fixed bias into an 8-ohm speaker, with no negative feedback and a solid-state rectifier.

Tags: vintage, low-wattage, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.