Soundsing Audio Manufacturing Co.,Ltd is one of the leading China 4.5" full range speaker manufacturers and suppliers, providing with column speakers wholesale, welcome to import high quality products from our factory. SD-40005A is a full range speaker. It has wide and smooth frequency range. It is used to replace bose speaker and for conference and public cabinet systems. We have 1 ohm also. Products specification   Size:4.5” Rated Power: 30W Peak Power: 60W Impedance: 4Ohm DC Impedance: 3.6 Ohm Sensitivity:92dB Frequency Response:150hz-15khz Voice Coil Diameter: 1 Inch Voice Coil Wire Material: ALU Bobbin Material: TIL Voice Coil Layers: 2 Layers Dampers: polycotton Cone: paper Magnet Size: 9.15OZ Mounting Detail: Outer diameter:124mm/4.5” Hole Cut Out diameter:108mm/4.25” Depth:55mm/2.16” Packing Information: 1 speaker one carton, 12 brown inner boxes packed into one brown outer box Carton Size:43*29.5*17.8CM Other Information Place of Original: Guangzhou, China Payment Terms: T/T, Western Union, Money Gram Port of Delivery: Huangpu, Guangzhou, China Production Lead Time:30days after receive 30% T/T