The origin of SM57 may be traced to 1937, when Shure engineer Benjamin Bauer developed the first single-element directional microphone, the Unidyne, which had a cardioid pickup pattern. In 1959, another Shure engineer, Ernie Seeler, advanced the art of microphone design significantly with the Unidyne III. Seeler torture-tested the Unidyne III during three years of research and development and thereby, produced the SM series of rugged and reliable Shure microphone capsules. The "SM" stands for Studio Microphone; Seeler was an aficionado of classical music and expected the SM57 to be used for orchestras. Because he "despised" rock music, the TEC Foundation said that it was ironic that the microphone has become "a mainstay of rock music."
Characteristics
The SM57 uses the same capsule as the popular SM58. Like the SM58, the SM57 is fitted with an XLR connector and features a balanced output, which helps to minimize electrical hum and noise pickup. According to Shure, the frequency response extends from 40 Hertz to 15 kHz. The SM57 is manufactured in the United States, Mexico, and China. The Shure A2WS is an accessory windscreen for the SM57 that attenuates wind noise and plosives, and protects the microphone capsule.
Use
The SM57 is a popular choice of musicians due to its sturdy construction and ability to work well with instruments that produce high sound pressure levels, such as percussion instruments and electric guitars. The School of Audio Engineering recommends the SM57 for four roles in a drum kit: kick drum, snare drum, rack toms, and floor tom. The cardioid pickup pattern of the microphone reduces the pickup of unwanted background sound and the generation of acoustic feedback. SM57s have also been a staple when reinforcing the sound from guitar amplifiers. Every U.S. president since Lyndon B. Johnson has delivered speeches through an SM57. It became the lectern microphone of the White House Communications Agency in 1965, the year of its introduction, and remains so. Due to its popularity, the SM57 has been counterfeited frequently by manufacturers in China and Thailand. Shure Distribution UK reports that the SM57, SM58, Beta 57A, and Beta 58A are their microphones that are most commonly counterfeited. In 2006, Shure mounted a campaign against the trading of counterfeit microphones.
Specifications
;Type: Dynamic ;Frequency response: 40 to 15,000 Hz ;Polar pattern: Cardioid ;Sensitivity : −56.0 dBV/Pa ;Impedance: Rated impedance is 150 ohms for connection to microphone inputs rated low impedance ;Connector: Three-pin professional audio connector ;Produced: 1965–present
