Hey! I redesigned him! Again! I think I'm finally happy with his look, though.
Short little backstory bit:
Beatbox was a rising star on Cybertron before it went dark. A youngster easily influenced by his twinspark brother, Soundtrack, he pledged allegiance to the Autobots, all the while trying to maintain his space in the spotlight. The singer-songwriter had always been a fan of Megatron's poetry, however, and when a radical Autobot general discovered such writings to be the inspiration for most of Beatbox's music, he was forced to resign from the Autobots and was ejected from Cybertron. He hitchhiked through the galaxies while the war continued, ending up on Earth near the end of his journey, battered and broken.
His brother, Soundtrack, is still looking for him.