The Shure RPM181/BI is a bidirectional condenser capsule for the versatile Shure BETA 181 microphone. The BETA 181/BI capsule is ideal for mono drum overheads, and dual instrument sound source 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: This Bidirectional (RPM181/BI) version, as well as a Cardioid (RPM181/C), Supercardioid (RPM181/S) and Omnidirectional (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).