collapse expand iconDescription

The Shure Beta RPM181/S is a supercardioid capsule for the versatile Shure Beta 181 microphone. The Beta RPM181/S capsule is ideal for snare drums, acoustic instruments, and any other close-miking 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).

collapse expand iconFeatures

  • A supercardioid capsule for the Shure Beta 181 mic
  • Ideal for snare drums, acoustic instruments, and any other close-miking applications.

collapse expand iconSpecs

  • Cartridge Type: Electret Condenser
  • Polar Pattern: Supercardioid
  • Frequency Response: 20 to 20,000 Hz
  • Output Impedance: 110 ?
  • Sensitivity (open circuit voltage, @ 1 kHz, typical: -49.5 dBV/Pa (2.5 mV)
  • Maximum SPL (1 kHz at 1% THD)
    2500 ? load: 154.5 dB SPL
    1000 ? load: 152.0 dB SPL
  • Signal-to-Noise Ratio: 71.5 dB
  • Dynamic Range:
    2500 ? load: 132.0 dB
    1000 ? load: 129.5 dB
  • Clipping Level @ 1 kHz, 1% THD:
    2500 ? load: 10.5 dBV
    1000 ? load: 7.5 dBV
  • Self Noise (equivalent SPL,A-weighted, typical): 22.5 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)

Featured Articles