SM 137 LC

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Type Electret Condenser
Frequency Response 20 to 20,000 Hz
Polar Pattern Cardioid
Impedance 150 Ω (actual)
Sensitivity (at 1 kHz, open circuit voltage) −41 dBV/Pa 1 Pascal=94 dB SPL
Maximum SPL (1 kHz, < 1% THD) 1000 Ω load: 139 dB (154 dB, Pad on) 2500 Ω load: 144 dB (159 dB, Pad on)
Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz) 75 dB S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range (at 1 kHz) 1000 Ω load: 122 dB 2500 Ω load: 128 dB
Common Mode Rejection (20 Hz to 20 kHz) > 50 dB
Clipping Level (20Hz-20 kHz at 1% THD) 1000 Ω load: 3 dBV 2500 Ω load: 9 dBVTHD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL
Self Noise(typical, equivalent SPL, A-weighted) 19 dB
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net: 195 g (8.9 oz.)
Switch Attenuator: −15 dB
Dimensions 162 mm (6.375 in.) L x 24 mm (0.950 in.)
Connector Three-pin professional audio (XLR), male
Power Requirements 48 Vdc phantom, 5.2 mA