The 1600W HD1801 18" Powered Subwoofer is the ideal companion to your HD Series full-range loudspeakers, creating an immensely powerful and truly high-definition PA system that you can actually transport from gig to gig. Class-D Fast Recovery™ amplification makes the HD1801 ultra-efficient, effortlessly delivering massive power to the 18" driver that’s custom-designed to handle the job. Expertly tweaked tuning filters, internal crossovers and protection circuitry are designed by EAW for the ulti..