SpecificationsTypeWoofersMidRange DriverTweeterFrequency ResponseNominal Input PowerMaximum Input PowerSensitivityCrossover FrequenciesImpedanceDimensions (W x H x D)Weight NS-777 Specifications Type 3-Way, 4-Speaker Bass-Reflex Floor-Standing Speaker System Woofers Dual 20cm PMD cone MidRange Driver 13cm cone with Waveguide horn Tweeter 2.5cm aluminium dome with Waveguide horn Frequency Response 30 Hz-35 kHz Nominal Input Power 100 W Maximum Input Power 250 W Sensitivity 89 dB/2.83 V/1 m Crossover Frequencies 1 kHz/4 kHz Impedance 6 ohms Dimensions (W x H x D) 276 x 1,100 x 390 mm Weight 24.4 kg/unit