Primarily used for kick drums, the Beta 91A is an electret condenser featuring a half cardioid polar pattern, maximizing gain before feedback and increasing isolation from unwanted sound. Sitting inside the kick drum, the Beta 91A does not require any external mounting.

The ability to handle extremely high SPL of up to 155dB, coupled with the two-postition contour switch, the Beta 91A delivers outstanding attack and clarity, achieving studio quality sound in all event situations.

The Beta 91A can be used as a stand alone bass drum mic, or in tandem with the Beta 52A, giving sound engineers all the tools they need to achieve the best sound possible dependent on the application.