In 1958, John Koss rewrote the rule book when he created the first stereo headphones, the Koss SP-3. Early models were nothing more than mini speakers covered in cardboard and sofa foam, but their impact was immense. Rather than make do with radio communication equipment and aviation hardware, Jazz lover Koss came up with something purely for music – and he helped fuel a revolution in the way people listened to it. His timing couldn’t have been better, coinciding with the invention of the teenager and this thing called Rock ‘n’ Roll.