Using the same acoustic components and horn material as the highly acclaimed Reference Premiere box speaker line, the Professional Reference Premiere Architectural series perfectly combines the aesthetics of an architectural speaker with the pure performance and dynamic voicing of the Reference Premiere series. With an 8” Cerametallic woofer and a 1” Titanium Dome Tweeter mated to a FEA optimized Tractrix® horn, the Pro-180RPC LCR brings dynamic, powerful, detailed Reference Premiere sound to your home theater system. 1" (2.54cm) Titanium Dome Tweeter mated to a FEA optimized square Tractrix® Horn, Angled 45°. 8" (16.51cm) Cerametallic Woofer, Angled 45°