Shure RPM181/BI Bidirectional Polar Pattern Capsule

Shure RPM181/BI Bidirectional Polar Pattern Capsule

Shure RPM181/BI Bidirectional Polar Pattern Capsule

B&H # SHBETA181BDC MFR # RPM181/BI
Shure RPM181/BI Bidirectional Polar Pattern Capsule

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Product Highlights

  • Bidirectional Capsule for Beta 181
  • Wide Dynamic Range
  • High SPL Handling
  • No Crossover Distortion
  • Exceptional Low-frequency Reproduction
  • Locking Ring Provides Secure Connection
  • Steel Grille Prevents Damage to Capsule
  • Lightweight (5.1 oz) Design with Preamp
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You Pay: $249.00

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  • 1Description

The RPM181/BI Bidirectional Polar Pattern Capsule by Shure is one of four interchangeable capsules for Shure's Beta 181 side-address instrument microphone. It features a locking ring which provides a secure connection with the Shure RPM181/PRE. Paired with this preamp, its compact design weighs only 5.1 oz and gets close to any source even in the tightest conditions. With its wide frequency response and high SPL handling, it's great for miking dual sound sources such as between toms or acoustic instruments. It can also be very useful as a mono drum overhead or use a pair to create the Blumlein stereo effect. It also performs with little to no crossover distortion and provides exceptional low-frequency reproduction.

The capsule is made with a hardened steel mesh grille that resists denting, wear and abuse. Along with its compact form factor, the diaphragm provides exceptional audio with consistent, textbook-like polar responses resulting in a mic with noteworthy sound and versatility.

Interchangeable side-address Bidirectional capsule for the Shure Beta 181
Locking ring provides secure connection between capsule and Shure RPM181/PRE preamp
Compact 5.1 oz design gets close to any source even in the tightest conditions
Provides wide dynamic range and high SPL handling
Performs with little to no crossover distortion and provides exceptional low-frequency reproduction
Hardened steel mesh grille resists denting, wear and abuse
In the Box
Shure RPM181/BI Bidirectional Polar Pattern Capsule
  • Limited 2 Year Warranty
  • Table of Contents
    • 1Description
    General
    Type Condenser
    Frequency Response 20 to 20,000 Hz
    Polar Pattern Bidirectional
    Sensitivity -51.0 dBV/Pa (2.6 mV)
    Output Impedance 110 ohms (at 1 kHz)
    Signal to Noise Ratio 71.0 dB
    Self Noise 23.0 dB SPL-A
    Common Mode Rejection ≥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
    Weight 5.1 oz (145 grams)
    Maximum SPL
    1000 Ohm Load 153.50 dB (1,000 ohm load)
    2500 Ohm Load 156.0 dB SPL
    Dynamic Range
    1000 Ohm Load 130.5 dB
    2500 Ohm Load 133.0 dB
    Clipping Level
    1000 Ohm Load 7.5 dBV
    2500 Ohm Load 10.5 dBV

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