System type 2-wayEnclosure type Bass-reflex Frequency response ± 3dB 60 - 22000 Hz Nominal impedance 8 OhmAmplifier Requirements 25 - 100 WSensitivity (2.83V/1m) 88 dB Tweeter 25 mm (1 in.)Woofer 165 mm (6.5 in.) Dimensions (H x W x D) 365 x 204 x 228 mm / 14.37 x 8.03 x 8.98 in.Weight 6.1 kg / 13.42 lbs.