In excellent working condition is the Shure 55S Unidyne. A vintage unidirectional dynamic microphone manufactured in the 1950's, this mic both looks and sounds great.
The Model 55s is a small, compact Microphone in which high-fidelity response end excellent directional pattern are achieved. The Ultra-Cardioid unidirectional characteristic of the microphone (obtained by the "Uniphase" principle*) provides highly satisfactory operation under adverse acoustic conditions. It permits placement of the microphone at a distance from the performer 75% greeter than is possible with non-directional (omnidirectional) microphones. The new "Small Unidyne," Model 55s, embodies all of the advantages found in the world-famous Shure Model 55 Unidyne. Its improvements are notable. The Shure-patented acoustic phaseshift network has been redesigned: the moving-coil system has been revised for high efficiency and extended, smooth, frequency response. Large air-gap clearances, together with a rugged coil construction, provide immunity of the moving system to abnormal atmospheric conditions and severe mechanical shock. The care is modern in design, with attractive streamlining and grille treatment. Model 55s is smaller than the Model 55, and is therefore ideal for installations where it is desired to keep the microphone size to a minimum and still retain maximum operating efficiency. A new self-adjusting swivel permits tilting of the head through 80° so that the microphone can be aimed at the source of sound. A built-in cable connector is provided; and a 20 foot, high-quality, two-conductor shielded cable with microphone plug attached is included.