Amazon.com: OSD Dual 8" in Wall Subwoofer 350W Reinforced Back Bridge, Easy Install, Paintable Grill, IWS88
Amazon.com: Monolith M-IWSUB82 Dual 8 inch in-Wall Subwoofer - Passive, Magnetic, Paintable Grille, Easy Install, Adds Powerful Bass to Your in Wall or in Ceiling Home Theater System : Electronics