Shure RPM181/PRE Replacement XLR Preamplifier

Shure RPM181/PRE Replacement XLR Preamplifier

Shure RPM181/PRE Replacement XLR Preamplifier

B&H # SHBETA181MP MFR # RPM181/PRE
Shure RPM181/PRE Replacement XLR Preamplifier

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Product Highlights

  • Replacement Preamp for Shure's Beta 181
  • Works with Four Interchangeable Capsules
  • Lightweight (5.1 oz)
  • Highly Versatile

You Pay: $249.00

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  • 1Description

The RPM181/PRE Replacement XLR Preamplifier by Shure is designed to work in combination with one of four interchangeable capsules for the Shure Beta 181 side-address instrument microphone. The capsules come in cardioid, supercardioid, omnidirectional and bidirectional polar patterns making a highly versatile pair.

With a capsule attached, it weighs only 5.1 oz and gets close to any source even in the tightest conditions. Its wide frequency response and high SPL handling is great for miking dual sound sources such as between toms or acoustic instruments. It is also very useful as a mono drum overhead or pair two to create the Blumlein stereo effect.

The RPM181/PRE matched with any of the available capsules performs with little to no crossover distortion and provides exceptional low-frequency reproduction. The pair provides exceptional audio with consistent, textbook-like polar responses resulting in a mic with noteworthy sound and versatility.

Works with one of four interchangeable capsules for the Shure Beta 181 instrument microphone
The cardioid, supercardioid, omnidirectional and bidirectional capsules make this mic highly versatile
Weighs only 5.1 oz with attached capsule and captures any source even in the tightest conditions
Matched with any available capsule it performs with little to no crossover distortion and provides exceptional low-frequency reproduction
In the Box
Shure RPM181/PRE Replacement XLR Preamplifier
  • Limited 2 Year Warranty
  • Table of Contents
    • 1Description
    Type Condenser
    Frequency Response 20 to 20,000 Hz
    Polar Pattern 181/C: Cardioid
    181/S: Supercardioid
    181/O: Omnidirectional
    181/BI: Bidirectional
    Sensitivity 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)
    Output Impedance 110 ohms (at 1 kHz)
    Signal to Noise Ratio Cardioid: 73.5 dB
    Supercardioid: 71.5 dB
    Omnidirectional: 70.5 dB
    Bidirectional: 71.0 dB
    Self Noise 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 ≥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
    Maximum SPL 1000 Ohm Load
    Cardioid: 149.0 dB SPL
    Supercardioid: 152.0 dB SPL
    Omnidirectional: 154.0 dB SPL
    Bidirectional: 153.5 dB SPL

    2500 Ohm Load
    Cardioid: 151.5 dB SPL
    Supercardioid: 154.5 dB SPL
    Omnidirectional: 157.0 dB SPL
    Bidirectional: 156.0 dB SPL
    Dynamic Range 1000 Ohm Load
    Cardioid: 128.5 dB
    Supercardioid: 129.5 dB
    Omnidirectional: 130.5 dB
    Bidirectional: 130.5 dB

    2500 Ohm Load
    Cardioid: 131.0 dB
    Supercardioid: 132.0 dB
    Omnidirectional: 133.5 dB
    Bidirectional: 133.0 dB
    Clipping Level 1000 Ohm Load
    7.5 dBV

    2500 Ohm Load
    10.5 dBV
    Weight 5.1 oz (145 grams)

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