Phase Technology IW200 SUB KIT In Wall SubwooferPhaseTech IW200 In Wall Subwoofer The PhaseTech IW200 is a dual 8 in wall subwoofer and works as an infinite baffle when installed without a backbox or acoustic suspension when used with the EB200 backbox. With a low profile driver design and positive clamping system, the subwoofer is capable of big sound in a small size. Shipped with a magnetic no bezel grille, it blends perfectly into any space. Order IW200 Sub Kit for the dual 8 subwoofer with a