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Audio Technica BP4073 Line + Gradient Condenser Microphone

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With an overall length of just 9.17″ and weight of just 3.5 oz, this microphone adds virtually no heft to the end of a fish pole or the top of a minicam. Through the use of an innovative Audio-Technica design, the interference tube of the BP4073 provides a narrow acceptance angle, effective for long-distance pickup. The highly directional mics offer low self-noise and are fully RoHS-compliant – free from all substances specified in the EU directive on the reduction of hazardous substances (RoHS).

- Designed for use in broadcasting, film/TV production and theater sound reinforcement applications

- Direct-coupled, balanced output ensures a clean signal even in high-output conditions

- Innovative acoustic design provides same directivity as mics up to 50% longer

- Switchable 80 Hz hi-pass filter & 10 dB pad

- Rugged housing made of lightweight structural-grade aluminum alloy

- RoHS-compliant - free from all substances specified in the EU directive on the reduction of hazardous substances (RoHS)


Externally polarized (DC bias) capacitor

Polar Pattern

Line + gradient

Frequency Response

20-20,000 Hz

Low Frequency Roll Off

80 Hz, 12 dB/octave

Open Circuit Sensitivity

-29 dB (35.5 mV) re 1V at 1 Pa


50 ohms

Maximum Input Sound Level

141 dB SPL, 1 kHz at 1% T.H.D.; 151 dB SPL, with 10 dB pad (nominal)

Dynamic Range

128 dB, 1 kHz at Max SPL

Signal to Noise Ratio

81 dB, 1 kHz at 1 Pa

Phantom Power Requiremens

48V DC, 4.8 mA typical


99 g


 233.0 mm long, 21.0 mm maximum body diameter

Output Connector

Integral 3-pin XLRM-type


AT8405a stand clamp for 5/8″-27 threaded stands; 5/8″-27 to 3/8″-16 threaded adapter; AT8144 windscreen; two O-Rings; protective carrying case


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