High excursion DCS165-4 driver delivers surprising output and extension in a small package. Adjustable-length port design allows you to tune to different frequencies to suit your needs. Down-firing configuration inherently protects the driver from curious fingers and/or feet if placed under a desk. Customize the precision cut CNC enclosure to fit any decor. This kit contains everything needed for assembly: pre-cut enclosure, driver, binding posts, screws, and wire