Negishi was in his 40s when he came up with the idea of prototyping a mass-produced, coin-operated karaoke machine, branded “Sparko Box” in 1967.
(Image credit: cookelman)
Negishi was in his 40s when he came up with the idea of prototyping a mass-produced, coin-operated karaoke machine, branded “Sparko Box” in 1967.