Ypsilonlive Α.Ε. - Home Page History Ypsilon live S.A. was founded by five young people, who were actively involved for more than 10 years in the Greek market as professional sound engineers, or light and sound technicians... Tavrou 6, Tavros Athens 17778, Greece tel. : +302103450437 fax. : +302103450205 email. : info@ypsilonlive.gr