The Wharfedale EVO4.CS is a center channel speaker designed to enhance TV dialogue, music, and sound effects. It's a 3-way speaker with a 30 x 60 mm AMT treble driver, a 50 mm soft-fabric midrange cone driver, and two 150 mm black woven Kevlar cone drivers. The EVO4.CS has a frequency response of 50–22,000 Hz (±3 dB), a recommended amplifier power of 25–100 watts, and a sensitivity of 89 dB.