... 3)ODM/OEM Service 4)Power:15W,20W,25W horn speaker Item Specifications:China Direct SupplierRoHS1) Product Type: Horn Speaker2) Product ... ,20W5) Operating Impedance: 4 / 6 / 8/ 12/16 ohm 6) Speaker Magnet: Ferrite7) Voice Coil Dimension:25.4mm8) Sound Pressure Level ... Expressing Characteristics of Product Shape in Details: HS-501 Horn Speaker,15W,20W,25W