Monitor Audio - Black Monitor 100 Book Shelf speakers The Monitor 100s are handsome speakers designed to be placed on a bookshelf or mounted on a stand. With their black bass driver cones and blackC-CAMtweeters, they delight both the eyes and the ears. The Monitor 100s are beautifully proportioned speakers featuring a 61/2"bass driver complemented by a 25 mm blacktweeter. With a larger bass driver and bigger cabinet, the 100s deliver a more expansive and punchy sound. Two sets of binding post terminals on each speaker allow for bi-wiring or a bi-amp set up. To maintain their compact proportions, and to allow positioning in the most confined locations, the speakers arerear ported.