Visaton KE 25 SC. Driver size: 25.4 mm (1 "), Tweeter size: 25 mm. RMS rated power: 80 W, Peak Music Power Output (PMPO): 140 W, Frequency range: 800 – 25000 Hz. Diameter: 104.5 mm, Weight: 0.98 kg. Dimensions (WxDxH): 104.5 x 104.5 x 60 mm, Audio output channels: 1.0, Material: Metal, Plastic