Shure RPM181/C – Cardioid capsule for Beta 181 microphone

SKU: RPM181/C Category: Brand:

Interchangeable cardioid capsule designed for the Shure Beta 181 microphone, ideal for drum overheads, piano, acoustic instruments, and professional studio recording.

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Shure RPM181/C - Cardioid capsule for Beta 181 microphone

Description

Shure RPM181/C Cardioid Capsule for Beta 181

The Shure RPM181/C is a high-performance cardioid capsule engineered for the Shure Beta 181 side-address instrument microphone system. Designed for precision and flexibility, this capsule is perfectly suited for drum overheads, piano, acoustic instruments, and critical studio recording applications. Its cardioid polar pattern focuses on the primary sound source while effectively rejecting off-axis noise, delivering clean and controlled audio capture.

When paired with the Shure RPM181/PRE preamp, the RPM181/C becomes a compact and lightweight microphone solution weighing just 5.1 oz, allowing placement even in the tightest recording spaces. Its wide frequency response, high SPL handling, and excellent dynamic range ensure accurate reproduction of both subtle nuances and powerful transients.

The capsule features a hardened steel mesh grille that resists dents, wear, and abuse, making it suitable for demanding studio and live environments. With consistent, textbook-style polar response and minimal crossover distortion, the RPM181/C delivers exceptional low-frequency reproduction and reliable sonic performance across a wide range of professional applications.

 

Features of Shure RPM181/C

 

  • Interchangeable cardioid capsule for Shure Beta 181 microphones

  • Ideal for drum overheads, piano, acoustic instruments, and studio recording

  • Suitable for M/S stereo techniques when paired with the RPM181/BI capsule

  • Cardioid polar pattern for focused sound capture and off-axis rejection

  • Wide dynamic range for detailed and natural audio reproduction

  • High SPL handling for loud instruments and close-miking

  • Minimal crossover distortion for clean, accurate sound

  • Exceptional low-frequency response

  • Locking ring ensures a secure connection to the RPM181/PRE preamp

  • Compact and lightweight design for use in confined spaces

  • Hardened steel mesh grille resists denting, wear, and abuse

 

Specifications of Shure RPM181/C

 

Product TypeInterchangeable Microphone Capsule
Microphone TypeCondenser
CompatibilityShure Beta 181, RPM181/PRE
Polar PatternCardioid
Frequency Response20 Hz – 20 kHz
Sensitivity-46.5 dBV/Pa (2.4 mV)
Output Impedance110 ohms (at 1 kHz)
Signal-to-Noise Ratio73.5 dB
Self Noise20.5 dB SPL-A
Common Mode Rejection≥ 55 dB
PolarityPositive pressure on diaphragm produces positive voltage on pin 2
Power Requirements11–52 V DC Phantom Power (IEC-61938), 2.4 mA max
Maximum SPL (1000 ohm)149.0 dB
Maximum SPL (2500 ohm)151.5 dB
Dynamic Range (1000 ohm)128.5 dB
Dynamic Range (2500 ohm)131.0 dB
Clipping Level (1000 ohm)7.5 dBV
Clipping Level (2500 ohm)10.5 dBV
Grille MaterialHardened Steel Mesh
Weight5.1 oz (145 g)

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