Rikstone C15B preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Rikstone C15b is a small-builder single-channel EL84 amp in the Vox AC15 mould, a simpler sibling of the C15. One EF86 pentode stage feeds Bass and Treble controls and a Volume, then a 12AX7 long-tail phase inverter drives two EL84s in cathode-biased push-pull with no negative feedback and no master volume. Power comes through an isolation transformer and a silicon bridge rectifier, with 8 and 16 ohm outputs.

• Made in: Finland
• Channels: 1
• Preamp tubes: 1× EF86, 1× 12AX7
• Power tubes: 2× EL84

Tags: modern.

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.