Product Highlights
Shure Beta 181/BI is an ultra-compact small-diaphragm side-address bidirectional capsule condenser microphone with multiple polar pattern capsule options for discreet placement and versatility in ... More
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Shure Beta 181/BI is an ultra-compact small-diaphragm side-address bidirectional capsule condenser microphone with multiple polar pattern capsule options for discreet placement and versatility in live and studio environments. Ideal for percussion, brass, and guitar and bass amps. Featuring 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..
Includes BETA 181/BI, stand adapter, windscreen, user guide, and carrying case that accommodates up to four polar pattern capsules.
Product Features
Interchangeable polar pattern capsules attach to a compact preamplifier with integrated XLR connections for the ultimate in low-profile application flexibility (Each Beta 181 ships with one polar pattern capsule and one XLR preamplifier. Capsules available separately for custom flexibility.)
Precision-engineered, compact side-address design features innovative locking ring to provide secure connection between capsule and preamplifier
Frequency response tailored for wide dynamic range applications for use in high SPL environments
Stand adapter
Windscreen
User guide
Carrying case that accommodates up to four polar pattern capsules.
Sensitivity open circuit voltage, @ 1 kHz, typical
–51.0 dBV/Pa[1] (2.6 mV) 1 Pa=94 dB SPL
Maximum SPL 1 kHz at 1% THD
2500 Ω load: 156.0 dB SPL 1000 Ω load: 153.5 dB SPL THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL
Signal-to-Noise Ratio
71.0 dB S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range
2500 Ω load: 133.0 dB 1000 Ω load: 130.5 dB
Clipping Level @ 1 kHz, 1% THD
2500 Ω load: 10.5 dBV 1000 Ω load: 7.5 dBV
Self Noise equivalent SPL, A-weighted, typical
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
CAMCOR ITEM NO. 136017328 | MFG. PART NO. BETA 181/BI
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