The Klipsch DNA, the hybrid Tractrix horn. The patented Tractrix geometry provides the most efficient transmission of high-frequency waves into the listening area. The phase plug and the compressed, shaped silicone surface ensure a consistent frequency response. This combination results in the cleanest and most natural sound available. The second generation of the Reference Premiere enlarges the horn for a wider soundstage and improved directivity. Upgrading to Dolby Atmos is made easy with the simple and hidden connections located on the back of the speakers. These refined connections reduce cable clutter and keep them in place for better cable management. Two binding posts for bi-wiring/bi-amping capability. Bi-wiring separates high and low-frequency signals into separate speaker cables, reducing intermodulation distortion for a clearer midrange. Bi-amping allows for individual customization with external crossovers when using separate amplifiers. Equipped with audiophile terminals and easily accessible aluminum binding posts for every type of connection. Finishes include ebony and walnut vinyl with satin-finished baffles and a scratch-resistant surface.