Product Name: Professional Speaker 15 Inch Neodymium Audio System 900 Watt Midrange Speaker. Model NO.: 15NF75U1 Certification: CE, RoHS, FCC Application: Stage Operation Mode: No Activity: Passive Noise: 0 AES Power Rating: 450 W Program Power: 900 W Frequency Range: 44-3000Hz Voice Coil: 3''vc Copper in/out Sensitivity: 98 dB Impedance: 8 Ohm Magnet: Neodymium Chassis: Red Steel Trademark: CI Transport Package: Carton Specification: 410 x 410 x 390 mm Origin: China HS Code: 8518290000 Product Description Professional Speaker 15 Inch Neodymium Audio System 900 Watt Midrange Speaker .3 INCH COPPER VOICE COIL98 dB/SPL SENSITIVITY900 WATT PROGRAM POWER HANDINGFEM OPTIMIZED MOTOR AND SUSPENSIonSOPTIMIZED COOLING SYSTEMRESonANCE FREE AND HEAVY DUTY BASKET DESIGNGENERAL SPECIFICATIonSNominaldiametermm(in.)386(15)NominalimpedanceΩ8MinimumimpedanceΩ6.5Programpower(1)W900AESPowerrating(2)W450Sensitivity(3)dB98FrequencyrangeHz44~3000Voicecoildiametermm(in.)75(3)ChassismaterialSteelMagnetmaterialNeodymiumMagnetdimensions(ODxIDxh)mm74x15x10CoilmaterialSVFormermaterialGlassFiberXmax(4)mm7.5Xmech(5)mm13Gapheightmm10VoicecoilWingdingheightmm20SMALL SIGNAL PARAMETERSDCresistanceReOhm5.5ResonancefrequencyFsHz44MovingmassMmsg85ComplianceCmsmm/N0.14ForcefactorBLN/A18.8MechanicalQ-factorQms8.7ElectricalQ-factorQes0.36TotalQ-factorQts0.35EquivalentairvolumeVasI131VoicecoilInductanceLemH0.8DiaphragmareaSdcm²880ReferenceefficiencyEta0%2.7SHIPPING INFORMATIONNetweightKg3.2Multipacksize(2)(WxDxH)mm410x410x390MultipackweightKg7.2QualityAssuranceSince the raw material sent in untill the speaker sent out, every aspect of them will be fully checked.We have many advanced test equipments to measure the quality of products. No defectives will be send out.Our company have a nice quality control managing system(QC) that have strict management ofproducts and staffs.FAQ1.Q:Areyouafactoryortradingcompany?A:Weareamanufacturer withourownfactory ,we have more than 15years experience.2.Q:CanyoudoOEMandODM?A:Yes,both.We can put your idea into products.3. How many days do you need to prepare the goods?We need about 20-25working days for large order.