Visaton DSM 25 FFL. Driver size: 25.4 mm (1 "), Tweeter size: 25 mm. RMS rated power: 80 W, Peak Music Power Output (PMPO): 140 W, Frequency range: 1000 – 30000 Hz. Diameter: 110 mm, Weight: 0.53 kg. Dimensions (WxDxH): 110 x 110 x 26.5 mm, Audio output channels: 1.0, Material: Metal