Using the BOSS Katana C212W Waza Guitar Speaker Extension Cabinet is easy. First, connect it to your Katana Artist Head using the 1/4 - inch phone - type jack. You can use it right away to enjoy the great rock tones. If you want to change the sound, you can remove the back panel to switch between closed - back and open - back tones. You can stack two cabinets to create a 4x12 setup, but make sure they are stable. When using it vertically, attach the additional rubber feet. As for maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. Wipe it with a soft, dry cloth regularly. If you have any questions, refer to the Owner's Manual.