Like the others in the range, these are impressively cohesive performers with a smooth tonal balance and easy-going nature. Enclosure type: 2-way reflex Bass unit: 165 mm (6.5 in) Treble unit: 22 mm (0.9 in) Frequency response (+/-3 dB, -6 dB): 46 Hz - 30 kHz Average impedance: 6 Ω Minimum impedance: 4 Ω Sensitivity (2.83v@1m): 88 dB Stereo amplifier power: 25 - 75 W AV receiver power (2 ch. driven): 50 - 145 W Crossover frequency: 2.4 kHz Effective volume: 12.5 L (763 cu in) Enclosure dimensions (HxWxD): 320x200x313 Overall dimensions (HxWxD): 325x200x329 Weight (per speaker): 6.4 kg (14.1 lbs)