This is the Shure 55S Vintage Elvis Mic from Indigo Ranch. Introduced in 1939 and was Shure’s first single-element unidirectional microphone. It looked similar, but had a somewhat wider body. This classic ‘small Unidyne’ version of the model 55S was introduced in 1951 with excellent performance qualities and distinctive styling ultimately make it ‘the most recognized microphone in the world.’
The 55S microphone has a cardioid (unidirectional) polar pickup pattern that minimizes sound pickup from the rear of the microphone. This allows the Model 55S to be used in close proximity to loudspeakers without creating feedback problems, and it can perform under adverse acoustic conditions where omnidirectional microphones cannot.
The 55S series has a low-impedance (50 Ohm) balanced output designed for connection to microphone inputs rated at 75 to 300 ohms. The microphone features a cartridge shock mount to reduce stand noise and an attached, self-tensioning, 5/8-27 thread swivel mount. This mic does not have an On/Off slide switch.
This microphone is ideal for public address or theatre-stage sound systems, as well as for broadcasting, recording, and other sound applications where a stand-mounted microphone with a classic look is desirable.