90 & degree; x 90 & degree; Silicon Composite Hybrid Tractrix Horn Horn loading maximizes efficiently and increases detail while focusing high frequencies towards the listening area. Proprietary Tractrix geometry provides the most efficient transfer of high frequency waves into the listening area. The phase plug and compressed molded silicon face ensure smooth frequency response. When combined the cleanest most natural sound possible is created. Linear Travel Suspension (LTS) Titanium Diaphragm Tweeter The exclusive Linear Travel Suspension minimizes distortion for enhanced detailed performance. LTS tweeters are a hallmark of previous Reference lines making it a core component of some of the best speakers in the world. Vented Tweeter Design The new vented tweeter housing reduces standing waves that create unwanted harmonics resulting in enhanced detail and clarity in high frequency reproduction. Spun Copper Cerametallic Woofers A signature feature on the Reference Premiere series Cerametallic woofers are exceptionally rigid and lightweight for minimal distortion and maximum efficiency. When paired with the Tractrix horn-loaded LTS tweeter it provides the highest speaker efficiency in its class. Tractrix Ports Utilizing Tractrix geometry the Reference Premiere ports allow for the most efficient fastest air transfer from the cabinet which reduces port noise for punchier low frequencies. Klipsch Tractrix ports have custom designed inner flares that help reduce air turbulence entering the port. Less turbulent air helps reduce port noise for cleaner more powerful bass. Robust Input Terminals Single 5-way screw terminals accept banana plugs or bare wire up to 12-guage for flexible lasting connections while the vibrant color coding provides easy setup and connection. Furniture Grade Materials and Finishes Finishes include ebony vinyl walnut vinyl and piano gloss. Ebony and walnut models boast satin painted baffles with a scratch resistant finish while the premium piano gloss cabinet is hand-san