Diatone speaker Ds 401 ,3-way, 3-speaker acoustic air suspension system ・ Bookshelf typeUnits UsedFor low band : 30 cm cone type For Medium Range : 10 cm Cone Type For High Range : 4 cm Semi-dome TypeNominal impedance6 ΩPlayback frequency band30 Hz to 20 kHzCrossover frequency500 Hz, 5 kHzOutput sound pressure level89dB/W/mMax Input80WLevel controlMid-range : 4 positions (500 Hz to 5 kHz) High Frequency : 4 positions (5 kHz to 20 kHz)External dimensionsWidth 370x Height 675x Depth 326 mmWeight25kg  Speakers