Bogen Challenger CHA10 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

A small tube public-address amplifier from Bogen's Challenger line, not a guitar amp. A 6AV6 mic preamp and 6AU6 stage feed a single-ended 6L6GB, with an EZ81 rectifier and mixed mic and phono inputs. Its simple single-ended output stage makes it a candidate for guitar conversion.

• Made in: USA
• Wattage: 10W
• Channels: 1
• Preamp tubes: 1× 6AV6, 1× 6AU6
• Power tubes: 1× 6L6GB

Tags: american, vintage, 6l6, class-a, low-wattage.

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.