Biamp Desono DX-S8 - Two-Way 8-Inch Surface Mount Loudspeaker (Black)Priced individually, but sold in pairs. The Desono DX surface mount loudspeakers provide high efficiency, high output, high intelligibility and low distortion in an attractive design. These loudspeakers install quickly and have the same components and voicing as the DX ceiling loudspeakers. The DX surface mount loudspeakers are equipped with a built in 70 V 100 V autoformer and low impedance input. For larger installations, the 8 inch coaxial DX S8