4 m 19 July 8, 2019 16 32 64 128 192 4 m audio 192 4 m audio driver Ehrhardt ev 4 m 1917 4 19 m in cm M 4 19 15 4 m − 19 12 4 m − 19 8 4 m − 19 0 M 4 17 19 M 4 16 19 19 4 m s in km h 4 5m 3n 19 m 6n M 192 4 19 4 m s in mm s
