When PreSonus introduced the CDL series of powered loudspeakers, artists and audio engineers alike were blown away by its unique, patent-pending combination of point source, line array and coaxial speaker concepts. The PreSonus CDL Sub18 is designed as a companion for the PreSonus CDL hybrid point source/array series of powered loudspeaker, or an addition to any other small to medium sound setup. It is an excellent choice for touring bands, mobile DJs, small venues and live sound contractors who need the added "thump" of 2,000W of tour-grade low-frequency rumble.