Upgrade your home theater system and enjoy exceptional surround sound with the MCenter Center Channel Loudspeaker from Boston Acoustics. Along with a pair of 4.5-inch polypropylene cone woofers, the MCenter features a 2.5-inch Balanced Mode Radiator (BMR) driver for consistent sound across a wide audio range. The speaker is short enough to fit easily on shelves and walls, and its ports have been put on the front to limit proximity effect when placed in cabinets or near walls