The Beta 91A is optimised for kick drums, as well as traditional low end applications including piano. It uses a half-cardioid condenser boundary microphone with an integrated XLR preamplifier that is tailored for a strong low-end response.
Transducer Type: Condenser
Polar pattern: Halfcardioid
Frequency response: 20Hz – 20kHz
Sensitivity (1kHz): -48,5 dBV/Pa / 3,8 mV/Pa
Equivalent selfnoise – 25,5 dB(A)
Sound pressure – 155dB