To use these d&b audiotechnik speakers, first find a suitable location for them. Make sure to connect them properly to your audio source. Since they don't come with mounting yokes, you'll need to find your own way to mount them if you want them off the ground. When it comes to maintenance, keep them in a dry and clean place. As the grille foam is missing, you might want to consider replacing it to protect the internal components from dust. Also, check the connections regularly to ensure good sound quality.