(1)PA speaker (2)passive,active,analog amplifier (3)fine appearance (4)High-quality workmanship (5)OEM ODM Size: 8"~15" active or passive for your optionalFeature: Digital amp / Analog amp Mp3 player/USB/SD/FM radio/ Ipod dock can be choice.SP series speaker Describes 1\SP-08,SP-10,SP-12, SP-15,8inch/10inch/12inch/15inch passive plastic speaker2\ SP-08,SP-10,SP-12, SP-15,8inch/10inch/12inch/ ...