The Shure Model 55s Multi‑Impedance Small Unidyne dynamic microphone datasheet details specifications, impedance options, acoustic characteristics, and…
The Model 55s is a compact dynamic microphone featuring an ultra‑cardioid pattern achieved by Shure’s patented "Uniphase" principle. It offers a self‑adjusting swivel, built‑in cable connector, and a 20‑ft two‑conductor shielded cable. The microphone provides three impedance settings (low, medium, high) to suit a wide range of audio systems and environments, making it suitable for public address, theater, studio, and field applications.
The datasheet lists detailed electrical specifications for each impedance position, acoustic response curves, physical dimensions, recommended grounding practices, and warranty information. It also includes installation notes such as cable routing to avoid AC hum and guidelines for optimal placement to minimize feedback and reverberation.