Shure KSM137/SL ST PAIR Studio Instrument Microphone

The Shure KSM137/SL ST Pair is a pair of end-address condenser microphones with a cardioid polar pattern. Designed for studio use, yet rugged enough for live applications, the KSM137 can withstand extremely high sound pressure levels (SPL). Its low self-noise and extended frequency response make it ideal for recording musical instruments.

Features

• A highly consistent cardioid polar pattern
• Ultra-thin, 2.5 micron, 24 karat gold-layered, low mass Mylar diaphragm for superior transient response
• Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response, no crossover distortion, and minimal harmonic and intermodulation distortion
• Premium electronic components, including gold-plated internal and external connectors
• Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibration
• Three-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs)
• Three-position switchable low-frequency filter reduces background noise and counteracts proximity effect
• Low self-noise
• Exceptional reproduction of low-frequency sounds
• Superior common mode rejection and suppression of RFI (radio frequency interference)
• Great for Close miking of acoustic instruments such as piano, guitar, violins, drums, and percussion; Overhead miking of drums and percussion instruments; Electric guitar amplifiers; Brass and woodwind instruments; Room ambience pick-up (guitar amplifier or drums); Orchestras, choirs, wind ensembles; Low-frequency instruments such as double bass and kick drum
• A137SPC Carrying Case, Two x A100WS Windscreens and Two x A57F Stand Mounts included with this pair of microphones

Specifications:

• Cartridge Type: Permanently Biased Condenser
• Frequency Response: 20–20,000 Hz
• Directional Polar Pattern: Cardioid
• Output Impedance: 150 Ohms (actual)
• Attenuation Switch: 0 dB,15 dB, or 25 dB attenuation
• Low Frequency Response Switch: Flat; –6 db/octave below 115 Hz; –18 dB/octave below 80 Hz
• Phantom Power: 48 Vdc+/- 4 Vdc (IEC–268–15/DIN 45 596), positive pins 2 and 3
• Current Drain: 4.65 mA typical at 48 Vdc
• Common Mode Rejection = 50 dB, 20 Hz to 20 kHz
• Polarity: Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3
• Dimensions and Weight: 20 mm (0.8 in.) diameter, 122 mm (4.8 in.) long; 100 grams (3.5 oz.)
• Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL): –37 dBV/Pa
• Self–noise (typical, equivalent SPL; A-weighted, IEC 651): 14 dB
• Maximum SPL at 1 kHz: 5000 Ohm load (Attenuator on): 145 (160, 170) dB, 2500 Ohm load (Attenuator on): 139 (154, 164) dB, 1000 Ohm load (Attenuator on): 134 (149, 159) dB
• Output Clipping Level: 5000 Ohm load: 15 dBV, 2500 Ohm load: 9 dBV, 1000 Ohm load: 3 dBV
• Dynamic Range: 5000 Ohm load: 131 dB, 2500 Ohm load: 125 dB, 1000 Ohm load: 120 dB
• Signal to Noise Ratio: 80 dB