System type 3-way Enclosure type Bass-reflex Frequency response ± 3dB 22 - 27000 HzNominal impedance 4 Ohm Amplifier Requirements 20 - 220 WSensitivity (2.83V/1m) 88 dB Tweeter 25 mm (1 in.) Midrange 2 x 133 mm (5.25 in.) Woofer 203 mm (8 in.) Dimensions (H x W x D) 1156 x 219 x 330 mm / 45.51 x 8.62 x 12.99 in. Weight 29.9 kg / 65.78 lbs.