3-way powered bookshelf speakers Bluetooth V4.1 with CSR technology Sub-out for an independent subwoofer Calibrated bass reflect port in front of the speaker cabinet F5 pin bi-amplifying XLR type speaker cable with angle connectors 3 Class D amplifier system with Digital Signal Processing and electronic tone control technologyPower output : R/L (Treble): 14W+14W R/L (Mid-range): 14W+14W R/L (Bass): 40W+40W Frequency response : 45Hz-20KHz Input : Line in/Optical/Coaxial/Bluetooth Bass unit : 6½ inch (178mm) Mid-range unit : 4 inch (116mm) Treble unit : inch (19mm) NdFeB Length (cm): 54.9 Width (cm): 38.5 Height (cm): 47.0 Net Weight (kg): 18.00 Gross Weight (kg): 19.50 Pieces per box: 1