JBL Control Now Bookshelf/Wall Mount Speaker (Black) (Discontinued by Manufacturer) The JBL Control Now loudspeaker utilizes dual 4" low frequency drivers The unique mounting sytem allows you to mount the speaker in corners, on walls, from the ceiling, or on the floor The speaker can be used as signal units or in arrays of 2, 3, 0r 4 speakers The JBL Control Now loudspeaker can be mounted from the ceiling using the optional ceiling or floor mount bracket This unique loudspeaker can virtually be mounted in any room and provide outstanding performance.