QSC AC-S4T Surface Mount Full Range 4-Inch Loudspeaker (Black)Priced individually, but sold in pairs. AcousticCoverage is designed to offer integrators a cost effective solution for applications where voice reinforced coverage is of primary concern, while providing improved musicality often not seen in typical BGM class products. Applications for AcousticCoverage speakers include wide area paging systems, background music, office buildings, healthcare facilities, concourses, transportation terminals and more.