Roland Cube-20 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The original solid-state Roland Cube-20 practice combo. Normal and Overdrive input jacks, the Overdrive jack at higher sensitivity, feed one JFET preamp chain with treble, middle and bass, Volume and a Master Volume, so overdrive comes from driving the preamp hard. A TA7200P chip drives the spring reverb with its own level control, and a discrete transistor power amp feeds the 8 ohm speaker, with a headphone jack.

• Made in: Japan
• Wattage: 20W
• Channels: 1

Tags: japanese, vintage, solid-state, reverb, practice, 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.