Using this Aguilar pickup set is easy. First, install it on your 4-string bass guitar following the standard pickup installation process. You can use the neck pickup alone for those deep, thunderous lows in your music. Or, switch to the bridge pickup for a sharp midrange cut that gives your sound more edge. You can also use them together for a unique combined tone. When it comes to maintenance, keep the pickups clean. Use a soft, dry cloth to wipe them down regularly. Avoid exposing them to extreme temperatures or humidity as this can affect their performance. If you notice any issues like a loss of sound quality or strange noises, check the connections first. If the problem persists, it might be a good idea to consult a professional guitar technician.