Overview
 
Side-address condenser microphone includes XLR preamplifier, microphone clip, windscreen, zippered case, and choice of condenser capsule. Capsule options include cardioid, supercardioid, bi-directional, and omni-directional polarities.
 
Interchangeable polar pattern capsules attach to a compact preamplifier with integrated XLR connections
Precision-engineered, compact side-address design features innovative locking ring to provide secure connection between capsule and preamplifier
Frequency response tailored for wide dynamic range applications for use in high SPL environments
 
Beta 181 Applications
 
This Beta 181 is a multipurpose instrument microphone and can be used on a wide variety of applications including guitars, bass and drums (overheads and snares). A total of four different capsules (Cardioid, Supercardioid, Bi-directional, Omni-directional) are available, allowing you to interchange them according to application.
Interchangable Capsule Options
The RPM181/C is a cardioid condenser capsule for the Beta 181. The RPM181/S is a super cardioid condenser capsule for the Beta 181. The RPM181/BI is a bi-directional condenser capsule for the Beta 181. The RPM181/O is a omni directional condenser capsule for the Beta 181.  
Applications for the different capsules 
The cardioid capsule is best suited to overheads, piano and acoustic instruments. You can also use the cardioid capsule for M/S stereo micing (in conjunction with another microphone with a bi-directional capsule).  The supercardioid capsule is best suited to snare, toms, acoustic instruments and other forms of close distance micing. The omni-directional capsule could be used for choirs, orchestras and ambient recording applications. Lastly, the Bi-directional capsule can be used for mono overheads, or for the recording of two instruments simultaneously on one channel. 
 
In the box
 
1 A57F Mic Clip
1 A181C Zippered Carrying Case
1 A181WS Windscreen