User's Manual
9
BP894x SPECIFICATIONS 
Element    Fixed-charge back plate, permanently polarized 
condenser 
Polar Pattern        Cardioid 
Frequency Response      20-20,000 Hz 
Low Frequency Roll-Off      80 Hz, 18 dB/octave (wired only) 
Open circuit Sensitivity      -47 dB (4.3 mV) re 1V at 1 Pa 
Impedance         250 ohms (wired only) 
Maximum Input Sound Level    135 dB SPL, 1 kHz at 3% T.H.D. 
Dynamic Range (typical)      98 dB, 1 kHz at 3% T.H.D. Max SPL (wired only) 
Signal-To-Noise Ratio      57 dB, 1 kHz at 1 Pa 
Phantom Power Requirements    11-52V DC, 2 mA typical (wired only) 
Switch          Flat, roll-off (wired only) 
Current Consumption      0.25 mA typical at 5V (wireless only) 
Voltage Range        3.5-10V (wireless only) 
Weight (Microphone)      Microphone, boom & earpiece: 2.0 g (0.07 oz) 
Weight (Power Module)      85 g (3.0 oz) (wired only) 
Dimensions Microphone:      9.67 mm (0.38") long, 2.6 mm (0.10") diameter 
            Boom: 98.4 mm (3.87") long, 1.07 mm (0.04") diameter 
Dimensions (Power Module)    100.0 mm (3.94") long, 18.9 mm (0.74") diameter (wired 
only) 
Output Connector (Power Module)  Integral 3-pin XLRM-type 
Cable          Detachable 1.4 m (55") long, 1.6 mm (0.06") diameter, 2- 
or 3-conductor shielded cable (termination dependent) 
Accessories Furnished      BP894x: AT8545 power module (wired only); AT8464x 
dual-ear adapter kit; 
AT8440 cable clip; AT8163 windscreen; AT8171 
windscreen; moisture guard; belt clip (wired only); 
carrying case 
BP894x-TH: AT8545 power module (wired only); 
AT8464x-TH dual-ear adapter kit; AT8440 cable clip; 
AT8163-TH windscreen; AT8171-TH windscreen; 
moisture guard; belt clip (wired only); carrying case 
Audio-Technica Case Style    M40 










