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ELEMENT Externally-polarized (DC bias) condenser
POLAR PATTERN Cardioid and Figure-of-eight
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave


  • Stereo 90°: -42 dB (7.9 mV) dB re 1V at 1 Pa
  • Stereo 127°: -41 dB (8.9 mV) dB re 1V at 1 Pa
  • Mid: -36 dB (15.8 mV) dB re 1V at 1 Pa
  • Side: -36 dB (15.8 mV) dB re 1V at 1 Pa



  • Mid and Side: 149 dB SPL, 1 kHz at 1% T.H.D.
  • 159 dB SPL, with 10 dB pad (nominal)


  • Stereo 90°: 25 dB SPL
  • Stereo 127°: 16 dB SPL
  • Mid: 15 dB SPL
  • Side: 17 dB SPL


  • Mid: 134 dB, 1 kHz at Max SPL
  • Side: 132 dB, 1 kHz at Max SPL


  • Stereo 90°: 69 dB, 1 kHz at 1 Pa
  • Stereo 127°: 78 dB, 1 kHz at 1 Pa
  • Mid: 79 dB, 1 kHz at 1 Pa
  • Side: 77 dB, 1 kHz at 1 Pa

PHANTOM POWER REQUIREMENTS 48V DC, 6.4 mA typical (both channels total)


  • 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

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Audio-Technica AT4050ST Stereo Condenser Microphone

2.00 LBS
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Product Description

The AT4050ST is a stereo side-address externally polarized (DC bias) condenser microphone with independent cardioid and figure-of-eight elements configured in a Mid-Side arrangement with switch-selectable internal matrixing. The microphone allows sound recordists the choice of selecting a left-right stereo output (wide 127° or narrow 90°) via the microphone’s internal matrixing system or choosing discrete Mid-Side signals for later manipulation. It is designed to meet the most critical acoustic requirements of professional recording, broadcast and sound reinforcement.

The microphone requires 48V phantom power for operation.

The microphone includes a 5.0 m (16.5') dual output cable terminating in a 5-pin XLRF-type to two standard 3-pin XLRM-type connectors. The output of the microphone is a 5-pin XLRM-type connector. The microphone is equipped with a switchable 10 dB pad and a switch that permits choice of flat response or low-frequency roll-off (via integral 80 Hz high-pass filter).

The microphone is enclosed in a rugged housing. The included AT8449 shock mount provides superior isolation and permits mounting on any microphone stand with 5/8"-27 threads. A dust cover and a protective carrying case are also included.


  • 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 M-S 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
  • Custom shock mount provides superior isolation
  • 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

Accessories Furnished

AT8449 shock mount for 5/8"-27 threaded stands; microphone dust cover; protective carrying case.