Line + Gradient Condenser Microphone


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The AT4073a has been discontinued. The BP4073 is a similar model, click here for more information. The AT4073a sets new standards in small size and light weight. With an overall length of just 9.13” and weight of just 4.0 oz, the mic adds virtually no heft to the end of a fish pole or the top of a minicam. Through the use of an advanced, propriety Audio-Technica design, the interference tube of the AT4073a provides a narrow acceptance angle that would require a tube 50 percent longer using conventional technology. Audio-Technica has pioneered a unique interference tube design* in the AT4071a and AT4073a shotgun mics that provides the same directivity as mics up to 50 percent longer.


  • Designed for critical long-distance pickup in broadcasting, film/TV production and theater sound reinforcement applications
  • Direct-coupled, balanced output ensures a clean signal even in high-output conditions
  • Exclusive acoustic design* provides same directivity as mics up to 50% longer
  • Switchable 150 Hz hi-pass filter
  • Rugged housing made of lightweight structural-grade aluminum alloy
* U.S. Patent No. 4,789,044


Element Externally polarized (DC bias) condenser
Polar Pattern Line + gradient
Frequency Response 30-20,000 Hz
Low Frequency Roll Off 150 Hz, 12 dB/octave
Open Circuit Sensitivity -23 dB (70.8 mV) re 1V at 1 Pa
Maximum Input Sound Level 126 dB SPL, 1 kHz at 1% T.H.D.
Noise 14 dB SPL
Dynamic Range 112 dB, 1 kHz at Max SPL
Signal-to-Noise Ratio 80 dB, 1 kHz at 1 Pa
Phantom Power Requirements 11-52V DC, 3.2 mA typical
Switches Flat, roll-off
Weight 4.0 oz (114 g)
Dimensions 9.13" (232.0 mm) long, 0.83" (21.0 mm) diameter
Output Connector Integral 3-pin XLRM-type
Accessories Included AT8405a stand clamp for 5/8"-27 threaded stands; AT8134 windscreen; protective carrying case
Audio-Technica Case Style SG2


AT4073a Specification Sheet