BETA Series Miniature Cardioid Drum Microphone

The Shure Beta 98AMP is a precision-engineered miniature cardioid condenser microphone for professional sound reinforcement and studio recording. Features an integrated XLR preamplifier with a flexible gooseneck and the A75M Universal Microphone Mount for accurate placement in any configuration of toms, snares, or percussion. An extremely uniform cardioid polar pattern provides excellent gain-before-feedback, off-axis rejection of unwanted noise, and high maximum sound pressure level (SPL).

Cartridge Type
Electret Condenser

Polar Pattern
Cardioid

Frequency Response
20 to 20,000 Hz

Output Impedance
150 ?

Sensitivity
open circuit voltage, @ 1 kHz, typical �50.5 dBV/Pa[1] (2.5 mV)

Maximum SPL
1 kHz at 1% THD[2]
2500 ? load: 157.5 dB SPL
1000 ? load: 153 dB SPL

Signal-to-Noise Ratio[3]
63 dB

Dynamic Range@ 1 kHz
2500 ? load: 126.5 dB
1000 ? load: 122 dB

Clipping Level@ 1 kHz, 1% THD
2500 ? load: 12.5 dBV
1000 ? load: 7.5 dBV

Self Noise equivalent SPL, A-weighted, typical
31.0 dB SPL-A

Common Mode Rejection
10 to 100,000 kHz
?60 dB

Polarity
Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

Power Requirements
11�52 V DC[4] phantom power (IEC-61938), 5.5 mA

Net Weight
130 g (4.6 oz.)

[1] 1 Pa=94 dB SPL
[2] THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL
[3] S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
[4] All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.