1)8 inch active audio loudspeaker system 2)50W rated power 3)Ceiling ... 5)Any OEM we can do . 8 inch active audio loudspeaker systemDetailed SpecificationModelZT-578ARated Power 50WLine Voltage70-100VSensitivity92dBFrequency Response90- ... Tweeter Speaker ,Sub woofer Speaker,Treble Speaker ,Brass Speaker , Audio Speaker ,Conference Speaker ,Meeting Speaker etc.4) Fidelity Sound,equipment ...