These subwoofers use advanced technology and application-driven engineering to bring live sound closer to the ultimate reference point: reality. Cutting edge high-power woofers and large rock-solid enclosures in a classic vented direct radiating design provide the natural uncolored sub bass favored by audio professionals around the world. Wherever audiences and operators demand the ultimate in sub bass performance, the DR18-1R and DRS18-1B subwoofers deliver the emotional impact obtainable only from 18-inch subwoofers.