Klipsch Reference Premiere RP-502S II Surround Speakers90 X 90 SILICON COMPOSITE HYBRID TRACTRIX HORN Horn loading maximizes efficiently and increases detail while focusing highfrequencies towards the listening area. Proprietary Tractrix geometry providesthe most efficient transfer of high frequency waves into the listening area. Thephase plug and compressed molded silicon face ensure smooth frequency response. When combined, the cleanest, most natural sound possible is created. The secondgeneration