Klipsch PRO160RPC Reference Premiere In Ceiling Speaker, EachTRUE REFERENCE PREMIERE ACOUSTICS 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 a 6. 5 Cerametallic woofer and a 1 Titanium Dome Tweeter mated to a composite coated round Tractrix