The Monitor 100s are beautifully proportioned speakers featuring a 61/2" MMP II bass driver complemented by a 25 mm black C-CAM tweeter. 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 are rear ported. The Monitor 100s truly deliver the classic Monitor Audio sound.