Sony's ECM-77 has been a broadcast standard since it arrived on the market sometime in the mid 1980's. It's both very good sounding and has a reasonably low noise floor for a miniature electret mic, and has stuck around for a very long time. Only really being equalled in more recent years due to the proliferation of Sanken COS-11 and DPA 4060/61/71 series lav mics. The latter of which are very much the lavs of choice for theatre, film and TV productions. Despite that the ECM-