Product Name: 4 to 18 Inch Full Range Woofer Speaker 250/300/450/500/800 Watts Model NO.: SPW-DB300G-17B Brand: Antel or OEM/ODM Acceptable Certification: ISO9001, CE WORD nChannels: 4.1Channel Usage: Accept, Expand Volume, Monitor, High Fidelity Radiation Mode: Direct Radiation Type Style: Horn/Squeare/Round Transducer Principle: Piezoceramics Speaker Cone: Polypropylene and Titanium Edge Transmission Mode: Air-conduction Category: Speaker Trademark: Antel or OEM/ODM acceptable Transport Package: Standard Epxort Carton Specification: 12 inch Origin: China HS Code: 8518290000 Product Description Art No. SPW-DB300G-17BFrequency Range:35~4KhzSensitivity(1W/1M): 93dBRated Power Input:350 WattsMAX Power Input:500 WattsImpedance: 4-8 OHMVoice coil diameter:50.8mm(2 inch)Diaphragm Material: ASV/KSV, according to the clients' requirementMagnet: Ferrite 140*60*20mmSize:6inch/ 8inch/ 10inch/12 inch/15 inch/18 inchPacking: 1pc/box, 2pcs/carton according to the clients' requirementBrand: OEM/ODM acceptable