The Shure SM81-LC is a cardioid condenser microphone used in live sound, broadcast, and recording scenarios. It features a flat-frequency response between 20 Hz and 20 kHz and provides a switchable low-pass filter that can be set to either 6 dB/octave or 18 dB/octave. Other features, such as a lockable -10 dB pad and SPL handling of 146 dB (with the pad on), make the microphone well suited for a variety of situations.

This mic sports a cardioid polar pattern that helps it achieve a high level of gain before inducing feedback, ensuring the mic will work well on the stage. This polar pattern also sports excellent off-axis rejection, helping to retain isolation in live and studio recordings.