An instant disco success in 1976, Double Exposure were also among the most seasoned vocal groups of the era with a strong foundation in traditional R&B. Previously known as United Image, the Philadelphians helped launch Salsoul Records with their dashing first single, "Ten Percent." DJ Walter Gibbons' remix of the song, the first commercial 12" single, catapulted the song to number two on Billboard's disco chart. Along with subsequent club hits "My Love Is Free" and "Everyman," "Ten Percent" was featured on the album of the same title, the first of three LPs the group recorded...