This listing is for schematic diagram I ripped during Artec Cubix G1 (G1R) guitar amp repair. 
This is nice small battery-powered guitar amplifier with analog overdrive system with four presets, powerful Class D output amp and "analog" solid state reverberator. 
If your amp requires repair - this schematic is just for you, it may help you to track and replace defective component.

Look at the photos of the actual PCB - my diagram is only for PCB on the photo, so if you have other version - schematic may not match your device. 
Buy with confidence.

Note: Capacitances of the SMD capacitors are not shown as they were not marked on the components. But capacitor malfunction is very rare, so it is not critical for repair purpose.

I email you high resolution schematiс in the .pdf format on the address you show me the day after payment is cleared.