Sony ECM-77B (ECM77B) Omni-Directional miniature lavalier (tie-clip) microphone with XLR Pre-amp. The ECM-77 is probably the most often seen lapel microphone on TV and it is used widely in both studio production and on location. Its popularity is based on a combination of excellent sound quality, robust construction and an attractive cosmetic design. This microphone is the ECM-77B XLR3 version with power barrel for use as a wired microphone.