In 1978, Mission Electronics launched the 770 loudspeaker. This revolutionary product featured the world's first commercial polypropylene drive unit. After this, swiftly followed the Mission 700 in 1979 - the first loudspeaker to use the now famous 'inverted driver array'. Throughout the 1970s and 1980s, development continued with an emphasis on materials technology. As polymer chemistry advanced, more advanced materials and composites became available. Experiments on these materials yielded significant advances in acoustic engineering. The lighter, stronger materials more able to track small signal changes. Into the 1990s, Mission became a force to be reckoned with, the name spread internationally, and became synonymous with high quality audio around the world. As sales grew, investment in development continued to create the 75 series, the 78 series and in 2001, the 'Pilastro' was launched.