Passive high power subwoofer equipped with two newly 18" long excursion neodymium speakers. The direct radiating design assures a extraordinary powerful and precise bass response at highest SPL down to the frequency limit of 25 Hz. Its bassreflex design has been optimized to minimize the flow noise. Due to the very low frequency tuning, the sound impression is voluminous but precise and responsive. The GB 218 is characterized by compact enclosure dimensions.