Using the Aguilar DCB 4PJ pickup set is straightforward. First, make sure your bass is turned off to avoid any electrical issues. Carefully install the pickups according to the standard installation procedures for your bass model. Once installed, turn on your bass and amp to start enjoying the unique sound. When using, keep in mind that these pickups are passive, so you don't need to worry about power sources. However, avoid exposing them to extreme temperatures as it might affect their performance. For maintenance, use a soft, dry cloth to gently wipe the pickups to keep them clean. Regularly check the connections to ensure they are secure and in good condition. If you encounter any problems, it's best to consult a professional technician.