Audio Technica AT4050ST Stereo Condenser Microphone

Article number: AT4050ST
Availability: Ships from manufacturer
Delivery time: Normal delivery time is 2-7 business days, subject to availability.

Offering the realism of a live sound field, the AT4050ST is a side-address condenser with cardioid and figure-of-eight elements configured in a Mid-Side arrangement. This innovative stereo condenser allows sound recordists the choice of selecting a left-right stereo output or choosing discrete Mid-Side signals for later manipulation, a remarkable flexibility. The microphone’s dual-diaphragm capsules maintain precise polar pattern definition across the full frequency range. Its transformerless circuitry virtually eliminates low-frequency distortion.


  • Innovative side-address Mid-Side stereo microphone engineered for professional recording, broadcast and sound reinforcement
  • Independent cardioid and figure-of-eight condenser elements
  • Switch selection of Mid-Side mode and two internally matrixed stereo modes
  • Dual-diaphragm capsules maintain precise polar pattern definition across the full frequency range of the microphone
  • Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients
  • The 2-micron-thick, vapor-deposited gold diaphragms undergo a five-step aging process so that the optimum characteristics remain constant over years of use
  • Open acoustical environment of the symmetrical housing assembly minimizes unwanted internal reflections
  • Integral 80 Hz high-pass filter switch and 10 dB pad switch
  • State-of-the-art design and manufacturing techniques ensure compliance with A-T’s stringent consistency and reliability standards
  • Custom shock mount provides superior isolation
  • Certified by the METAlliance (Music Engineering and Technology Alliance)


  • ELEMENT: Externally-polarized (DC bias) condenser
  • POLAR PATTERN: Cardioid and Figure-of-eight
  • FREQUENCY RESPONSE: 20-18,000 Hz
  • LOW FREQUENCY ROLL-OFF: 80 Hz, 12 dB/octave
  • OPEN CIRCUIT SENSITIVITY (dB re 1V at 1 Pa): Stereo 90°: -42 dB (7.9 mV); Stereo 127°: -41 dB (8.9 mV); Mid: -36 dB (15.8 mV); Side: -36 dB (15.8 mV)
  • IMPEDANCE: 50 ohms
  • MAXIMUM INPUT SOUND LEVEL: Mid and Side: 149 dB SPL, 1 kHz at 1% T.H.D.; 159 dB SPL, with 10 dB pad (nominal)
  • NOISE: Stereo 90°: 25 dB SPL; Stereo 127°: 16 dB SPL; Mid: 15 dB SPL; Side: 17 dB SPL
  • DYNAMIC RANGE (typical 1 kHz at Max SPL): Mid: 134 dB; Side: 132 dB
  • SIGNAL-TO-NOISE RATIO (1 kHz at 1 Pa ): Stereo 90°: 69 dB; Stereo 127°: 78 dB; Mid: 79 dB; Side: 77 dB
  • PHANTOM POWER REQUIREMENTS: 48V DC, 6.4 mA typical (both channels total)
  • SWITCHES: 90°, 127°, M-S; Flat, roll-off; 10 dB pad (nominal)
  • WEIGHT: 517 g (18.2 oz)
  • DIMENSIONS: 193.0 mm (7.60") long, 53.4 mm (2.10") maximum body diameter
  • OUTPUT CONNECTOR: Integral 5-pin XLRM-type
  • CABLE: 5.0 m (16.5') long, 8-conductor, shielded, vinyl-jacketed stereo cable with 5-pin XLRF-type connector at microphone end and two 3-pin XLRM-type connectors at output end
  • ACCESSORIES FURNISHED: AT8449 shock mount for 5/8"-27 threaded stands; microphone dust cover; protective carrying case
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