An omnidirectional capsule for the versatile Shure 181 mic.

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The Shure RPM181/O is an omnidirectional condenser capsule for the versatile Shure Beta 181 microphone. The RPM181/O l capsule is ideal for use for ambient recordings or for instrument ensemble applications.

The Shure Beta 181 (sold separately) is a multipurpose instrument microphone and can be used on a wide variety of applications including guitars, bass and drums (overheads and snares). It has a small diaphragm design that provides superior audio with textbook polar responses in a form factor compact enough to get close to the source in the tightest conditions.

There are four different capsules available for the Beta 181 microphone: Cardioid (RPM181/C), Supercardioid (RPM181/S), Bi-directional (RPM181/BI), Omni-directional (RPM181/O). This makes the Beta 181 an extremely versatile and cost-effective mic that allows the user to interchange capsules according to the application. (Additional capsules sold separately).

Shure RPM181/O Omnidirectional Capsule for Beta 181 Features:

An omnidirectional capsule for the Shure Beta 181 mic
Ideal for use for ambient recordings or for instrument ensemble applications

Shure RPM181/O Omnidirectional Capsule for Beta 181 Specifications:

Cartridge Type: Electret Condenser
Polar Pattern: Omnidirectional
Frequency Response: 20 to 20,000 Hz
Output Impedance: 110 O
Sensitivity (open circuit voltage, @ 1 kHz, typical: –52.0 dBV/Pa (2.6 mV)

Maximum SPL (1 kHz at 1% THD)
2500 O load: 157.0 dB SPL
1000 O load: 154.0 dB SPL

Signal-to-Noise Ratio: 70.5 dB

Dynamic Range:
2500 O load: 133.5 dB
1000 O load: 130.5 dB


Clipping Level @ 1 kHz, 1% THD:
2500 O load: 10.5 dBV
1000 O load: 7.5 dBV

Self Noise (equivalent SPL,A-weighted, typical): 23.5 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 phantom power (IEC-61938): 2.4 mA, maximum
Capsule width: 1.36" (34.54mm)

Shure RPM181/O Omnidirectional Capsule for Beta 181

One year warranty on wireless mics, mixers, and circuitry products.
2 year warranty on wired mics.
Warranty terms vary. Check with manufacturer for specific product warranty.

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