Tony “T-Bone” Hightower started out singing with vocal quartet 4.0, a group known for their backing vocals on songs by the Dungeon Family. Before they made their first appearance, however, Hightower had already sung on “Southernplayalisticadillacmuzik” by OutKast, released in 1994. While still with 4.0, Hightower also worked with Johnny Gill on his song “Bring It On.” After the group split, Hightower returned with his 1997 solo debut; Messiahs Galore. A year later, he provided vocals on Prince Paul’s “A Prince Among Thieves” and Ricky Bell’s solo version of “When Will I See You Smile Again.”

2006 held a writing credit on Sleepy Brown’s “Come Dance With Me” for Hightower, but he didn’t fully return until the next decade. Ever since, he’s been busy providing vocals for Cut Copy, Octave One, Candi Staton, and Big KRIT. In 2015 he released a jazz album titled The New Standard.

Singer Jason Sylvain was part of 90’s Atlanta boy band 4.0. While working with the soul quartet, Sylvain received a solo credit for Pebbles‘ 1995 single “Are You Ready?”, which he wrote with the likes of Mario Winans and Debra Killings.

After 4.0 disbanded, Sylvain returned to the scene by performing vocals on Bubba Sparxxx' “Well Water” in 2001. Sparxxx' album Dark Days, Bright Nights, on which “Well Water” featured, was certified gold by the RIAA that same year, having sold half a million copies.

4.0, also known as The Four Phonics, was a vocal quartet from Atlanta. The boy band consisted of Jason Sylvain, Tony Hightower, Ron Jackson, and Sammy Crumbley. As a group, they released one, self-titled album in 1997 with help from Organized Konfusion, Stokley Williams, and Jimmy Jam & Terry Lewis (through whom the group landed performance credits on Lionel Richie’s Louder Than Words). 4.0 featured the single “Have a Little Mercy” and the song “Oh Baby,” the latter of which appeared on the soundtrack to the movie Money Train.

The group, however, is remembered mostly for their contributions to several Dungeon Family records. In 1995 they provided backings on songs by Pebbles, Society of Soul, and Goodie Mob, whose 4.0-assisted “Soul Food” was released as a single the following year. 1998 marked two more features; OutKast’s “Hold On, Be Strong” and “Synthesizer” (which featured the legendary George Clinton.)