Biamp Desono DX-IC4 - Two-Way 4.5-Inch Ceiling Loudspeaker (White)Priced individually, but sold in pairs. The smallest member of the Desono's DX ceiling loudspeakers, the DX IC4 possesses the advanced features of its larger siblings with performance that belies its small size. Suitable for paging, background music, or to augment larger systems, the DX IC4 is a versatile performer. It installs quickly and provides exceptionally uniform coverage with excellent sonic properties. Uniform voicing among the Desono DX