To use these Clair Bros 15CX loudspeakers, first make sure they are placed on a stable surface. Connect them to your audio source using appropriate cables. You can adjust the volume and other settings on your audio device to get the best sound. When it comes to maintenance, keep the speakers clean by gently wiping them with a soft, dry cloth. Avoid exposing them to extreme temperatures or moisture. If you notice any problems with the sound quality, check the connections first. Remember, one speaker has a cosmetic damage on the top lip near the grille and the other has scuffs on the back, but this shouldn't affect the normal use of the speakers.