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Stereo Condenser Microphone

U.S. Five-Year Limited End-User Warranty

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.

  • studio microphone
  • side-address microphone
  • side
  • studio condenser microphone
  • accessories for side-address microphone

  • Overview
  • Features
  • Specifications
  • Downloads
  • Reviews
  • Q & A

  • Overview

    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.
  • Features

    • 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)

  • Specifications

    ELEMENTExternally-polarized (DC bias) condenser
    POLAR PATTERNCardioid and Figure-of-eight
    LOW FREQUENCY ROLL-OFF80 Hz, 12 dB/octave
    OPEN CIRCUIT SENSITIVITYStereo 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
    IMPEDANCE50 ohms
    MAXIMUM INPUT SOUND LEVELMid and Side: 149 dB SPL, 1 kHz at 1% T.H.D.;
    159 dB SPL, with 10 dB pad (nominal)
    NOISEStereo 90°: 25 dB SPL
    Stereo 127°: 16 dB SPL
    Mid: 15 dB SPL
    Side: 17 dB SPL
    DYNAMIC RANGE (typical)Mid: 134 dB, 1 kHz at Max SPL
    Side: 132 dB, 1 kHz at Max SPL
    SIGNAL-TO-NOISE RATIOStereo 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 REQUIREMENTS48V DC, 6.4 mA typical (both channels total)
    SWITCHES90°, 127°, M-S;
    Flat, roll-off;
    10 dB pad (nominal)
    WEIGHT517 g (18.2 oz)
    DIMENSIONS193.0 mm (7.60") long,
    53.4 mm (2.10") maximum body diameter
    OUTPUT CONNECTORIntegral 5-pin XLRM-type
    CABLE5.0 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 FURNISHEDAT8449a shock mount for 5/8"-27 threaded stands; microphone dust cover; protective carrying case
    Click on the chart to view the larger image
    STEREO 90°
    STEREO 127°

  • Downloads

    AT4050ST Specification Sheet (pdf 605.84 KB)
    AT4050ST Submittal Sheet (pdf 857.62 KB)
    Optional Windscreens / Mounts
  • Reviews

    AT4050ST is my 'GO TO' Mic!


    I purchased an AT4050ST because I needed a stereo mic that would be able to give me quality sound in my tracks, but also lots of choices as to what I can do with it. I record vocals and guitar mostly, and it's just sooooo much easier to have a stereo mic that already has stereo modes built into it! I love the fact that you don't need to buy 2 mics that may or may not be figured correctly when you use them in a M/S setting or other. This mic also works excellent as an overhead mic for drums and chorus. There are a few stereo mics out there, but not with the quality like this, AND with Mid-Side and two different degree switches! This is the mic of the future guys! My tracks sound so much more professional! Thank you Audio Technica! You have surpassed all the others! This is my 'Go To' mic for all stereo apps!! Will be hard for anyone to pry this out of my hands!

    NM, USA

    AT4050ST Stereo Condenser Microphone

    5.0 1


  • Q & A

    Hello Audio-Technica If I use the 4050ST in MS mode do I need to record the side channel into my DAW, duplicate the track and then flip the phase like I do with two regular mics using the MS technique or does it come with three different cables with the two cables for MS already flipped and ready to record?

    Studio Life Inc

    Yes, you are duplicate the track and flip the phase of the duplicated track. Additional information here:


    4050st on vocals I have a 4050st and I would like to use it to record lead vocals. What setup do you think would be the best for this? Can you tell me what settings I should be using. Also as a bonus do you have any suggestions for trombone and hand drums. Thanks


    Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at for assistance with this.


    4050 _ 4050 st - 4080 I've owned an original 4050 for over 10 years and I love it. I'm thinking of replacing a German-made condensor I have, with either the 4050ST or the new 4080 Ribbon. Which would work best alongside my 4050 ? thanks


    Thank you for your inquiry. It would depend upon you your use. I would use the AT4050ST for recording choirs, ensembles, drum overheads and such. Anywhere you would like a nice stereo image. I would look at the AT4080 for anywhere you want a very good mono recording, such as vocals, acoustic guitar, guitar cabinet and so on.


    The AT4050ST would be overkill next to the 4050 since the 4050ST already has 2 mics in it. If you add another mono mic like the 4050, you can create stereo audio with them both and save money, since the 4050ST is over $1000 US. Anyway, just my opinion.