What happened to "Sound Barrier"?

Question

They were a hard rock band from the 80's. They were all African-Americans.

Answer 1

Sound Barrier was most notable for the fact that all four members were African American, which garnered them significant publicity, but which didn't result in commercial success. They were signed by MCA Records, but their first album, Total Control, sold just 12,000 copies, and MCA dropped the group. Two subsequent releases, the self-released EP Born to Rock (1984) and the Metal Blade LP Speed of Light (1986), also fared poorly, and the band split up in 1987.
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Answer 2

never heard of them