a staple when reinforcing the sound from guitar amplifiers. In a more unconventional fashion, the SM57 has been favored by some as a vocal mic, both live and in the studio. Notable singers known to have recorded vocals with an SM57 include Anthony Kiedis, Brandon Flowers, Madonna, David Bowie, John Lennon, Jack White, Bjork, Peter Gabriel, Paul Rodgers, Tom Waits, Wayne Coyne, Tom Petty Alice Cooper, Erykah Badu, Caleb Followill and Raphael Saadiq. An early model of the mic, the Unidyne 545 was used on Pet Sounds for Brian Wilson's vocal tracks. 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 (at 1,000 Hz open circuit voltage) −56.0 dBV/Pa (at 1,000 Hz) Impedance Rated impedance is 150 ohms (300 ohms actual) for connection to microphone inputs rated low impedance Connector Three-pin professional audio connector (male XLR type) Produced 1965–present See also Shure SM7, a mic that uses a modified version of the Unidyne III capsule and no transformer. Shure MV7 References External links SM57 official page Sound&Recording - 50 Years of Shure SM57 SM57