Transducer (Moving Coil) Dynamic Polar Pattern SM57: Cardioid Beta 52A: Supercardioid Frequency Response SM57: 40Hz – 15kHz Beta 52A: 20Hz – 10Khz Maximum Input Sound Level Beta 52A: 174dB @ 1000Hz (calculated) Power Requirements None Dynamic, Requires No Phantom or Battery Power Output Impedance 150 Ohms (300 Ohms Actual) for Connection to Low Impedance Microphone Inputs Output Connectors XLR-3M Type Dimensions SM57: 6.2 x 1.25" (157 x 32mm) LxDiameter Beta 52A: 4.46 x 3.75" (113.28 x 95.25mm) LxDiameter Weight SM57: 10 oz. (284g) Beta 52: 21.6oz (605g)