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 smooth frequency response. This combination creates 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 input terminals 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 tuning with external crossovers when using separate amplifiers. Equipped with audiophile terminals and easily accessible aluminum connectors for every type of connection. The finishes include ebony and walnut vinyl with satin-finished baffles and a scratch-resistant surface.