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By: Shure
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Microphones, Headphones & Wireless systems
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Ultra-Compact Side-Address Instrument Microphone
The Shure Beta Microphone Series BETA 181 is an ultra-compact, small-diaphragm side-address condenser microphone, designed for discreet placement and control in live and studio environments. The BETA181 features interchangeable cardioid, supercardioid, omnidirectional and bidirectional capsule options for superior versatility, the small diaphragm design provides superior audio with consistent, textbook polar responses in a form factor small enough to get close to the source in the tightest conditions.
Premier live performance microphone with Shure quality, ruggedness, and reliability
Compact preamp attaches to four interchangeable capsules
Wide dynamic range for use in high SPL environments
Side-address form allows for discreet positioning in tight performance and recording settings
Innnovative locking ring provides a secure connection between capsule and preamp
Hardened steel mesh grille resists denting, wear, and abuse
Compact design, under 12 cm (5 in.), reduces stage clutter
Furnished with stand adapter and carrying case
Cartridge Type Electret Condenser
Polar Pattern 181/C= Cardioid; 181/S= Supercardioid; 181/O= Omnidirectional; 181/BI= Bidirectional
Frequency Response 20 to 20,000 Hz
Output Impedance 110 O
Sensitivity open circuit voltage, @ 1 kHz, typical Cardioid= –46.5 dBV/Pa[1] (2.4 mV); Supercardioid= –49.5 dBV/Pa[1] (2.5 mV); Omnidirectional= –52.0 dBV/Pa[1] (2.6 mV); Bidirectional= –51.0 dBV/Pa[1] (2.6 mV)
Maximum SPL 1 kHz at 1% THD[2] 2500 O load= Cardioid: 151.5 dB SPL; Supercardioid= 154.5 dB SPL; Omnidirectional= 157.0 dB SPL; Bidirectional= 156.0 dB SPL
Maximum SPL 1 kHz at 1% THD[2] 1000 O load= Cardioid: 149.0 dB SPL; Supercardioid= 152.0 dB SPL; Omnidirectional= 154.0 dB SPL; Bidirectional= 153.5 dB SPL
Signal-to-Noise Ratio[3] Cardioid= 73.5 dB; Supercardioid= 71.5 dB; Omnidirectional= 70.5 dB; Bidirectional= 71.0 dB
Dynamic Range 2500 O load Cardioid: 131.0 dB; Supercardioid= 132.0 dB; Omnidirectional= 133.5 dB; Bidirectional= 133.0 dB
Dynamic Range 1000 O load Cardioid: 128.5 dB; Supercardioid= 129.5 dB; Omnidirectional= 130.5 dB; Bidirectional= 130.5 dB
Clipping Level @ 1 kHz, 1% THD 2500 O load= 10.5 dBV
Clipping Level @ 1 kHz, 1% THD 1000 O load= 7.5 dBV
Self Noise equivalent SPL, A-weighted, typical Cardioid= 20.5 dB SPL-A; Supercardioid= 22.5 dB SPL-A; Omnidirectional= 23.5 dB SPL-A; Bidirectional= 23.0 dB SPL-A
Common Mode Rejection 20 to 20,000 kHz >_55 dB
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Power Requirements 11–52 V DC[4] phantom power (IEC-61938) 2.4 mA, maximum
Net Weight 145 g (5.1 oz.)



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Prices and specifications subject to change without notice.