Shure RPM181/BI – Bi-directional capsule for Beta 181 microphone

Shure RPM181/BI Bidirectional Capsule for Beta 181

The Shure RPM181/BI is a precision-engineered bidirectional capsule created specifically for the Shure Beta 181 side-address instrument microphone system. Designed for professional studio and live applications, this capsule excels in situations that require accurate capture of sound from both the front and rear, making it ideal for mono drum overheads, paired instruments, and creative stereo techniques such as the Blumlein configuration.

When paired with the Shure RPM181/PRE preamp, the capsule forms a compact, lightweight microphone solution capable of fitting into extremely tight recording spaces. Its wide frequency response, high SPL handling, and minimal crossover distortion ensure clean, detailed audio reproduction, while delivering exceptional low-frequency performance.

Built with a hardened steel mesh grille, the RPM181/BI offers outstanding durability, resisting dents, wear, and abuse common in demanding recording environments. With its consistent and accurate polar pattern, this capsule provides professional-grade flexibility and sonic reliability for engineers and musicians alike.

Features of Shure RPM181/BI

• Interchangeable bidirectional capsule for Shure Beta 181 microphones

• Ideal for mono drum overheads and dual instrument sound sources

• Supports advanced stereo techniques such as Blumlein when used in pairs

• Wide dynamic range for accurate and detailed sound capture

• High SPL handling for loud instruments and close-miking applications

• Exceptional low-frequency reproduction with minimal crossover distortion

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

• Compact and lightweight design for use in tight recording spaces

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

• Consistent, textbook-like bidirectional polar response

Specifications of Shure RPM181/BI