To use this subwoofer, first connect it to your audio system following the standard speaker connection method. Place it in a suitable position where it can effectively distribute bass, like near the front of the room. When in use, avoid over - driving the subwoofer to prevent damage. As for maintenance, regularly check the connections to ensure they are secure. Since the grille foam is missing, be careful to keep dust and small particles away from the internal components. You can use a soft, dry cloth to clean the exterior of the subwoofer occasionally.