The Adamson IS118 is a companion subwoofer to the IS7, featuring a lightweight, long-excursion 18" ND18-S Kevlar Neodymium driver with Adamson’s Advanced Cone Architecture. Its ultra-efficient front-loaded enclosure delivers clean, musical low-frequency reproduction. The cabinet is constructed from marine-grade birch plywood, aircraft-grade aluminum, and steel, with front and rear Speakon™ NL4 connectors or optional barrier strips. An integrated rigging system matches the IS7, allowing the IS118 to be flown in the same array using a simple adapter frame.