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

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

  • Overview

    The AT4040 side-address condenser microphone features an advanced large diaphragm tensioned specifically to provide smooth, natural sonic characteristics. A marriage of technical precision and artistic inspiration, the AT4040 offers exceptionally low noise, wide dynamic range and high-SPL capability for greatest versatility. This ultra-consistent microphone may be used with confidence in a wide variety of studio and live miking applications, even under the stringent demands of digital recording systems. The AT4040ís low-noise circuitry is symmetrical and transformerless, resulting in exceptional transient response and clean output signals for transparent reproduction of even the most troublesome of instruments and sound effects.

    Check out audio samples and interior views of the AT4040 and other 40 Series side-address condensers
  • Features

    • Technically-advanced large diaphragm tensioned specifically to provide smooth, natural sonic characteristics

    • Externally polarized (DC bias) true condenser design

    • Exceptionally low noise, wide dynamic range and high-SPL capability for greatest versatility

    • Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients

    • Precision-machined, nickel-plated brass, acoustic element baffle provides enhanced element stability and optimal sensitivity

    • Open acoustical environment of the symmetrical housing assembly minimizes unwanted internal reflections

    • State-of-the-art surface-mount electronics ensure compliance with A-T's stringent consistency and reliability standards

    • Custom shock mount provides superior isolation

    • Switchable 80 Hz hi-pass filter and 10 dB pad

  • Specifications

    ELEMENTExternally-polarized (DC bias) condenser
    LOW FREQUENCY ROLL-OFF80 Hz, 12 dB/octave
    OPEN CIRCUIT SENSITIVITY-32 dB (25.1 mV) re 1V at 1 Pa
    IMPEDANCE100 ohms
    MAXIMUM INPUT SOUND LEVEL145 dB SPL, 1 kHz at 1% T.H.D.;
    155 dB SPL, with 10 dB pad (nominal)
    NOISE12 dB SPL
    DYNAMIC RANGE (typical)133 dB, 1 kHz at Max SPL
    SIGNAL-TO-NOISE RATIO82 dB, 1 kHz at 1 Pa
    SWITCHESFlat, roll-off;
    10 dB pad (nominal)
    WEIGHT12.7 oz (360 g)
    DIMENSIONS6.69" (170.0 mm) long,
    2.10" (53.4 mm) maximum body diameter
    OUTPUT CONNECTORIntegral 3-pin XLRM-type
    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

  • Downloads

    AT4040 Specification Sheet (pdf 323.86 KB)
    AT4040 Submittal Sheet (pdf 352.65 KB)
    Optional Windscreens / Mounts
  • Reviews

    Want that "high end sound" for a low end price?


    I've had this mic for about 4 years and it still sounds incredible. I've paired it with better pre-amps over time and it shines even better in it's performance.

    Cincinnati, OH


    Great value.


    I've had this mic for years. It's a good vocal mic. Sax, piano and acoustic guitar are especially favored I do not use this with electric guitar as there is too much break up on the low-end, tone is affected. (Get out the 58's..)

    St louis MO


    Best for under $800


    Product is amazing for this price. Well thought out. Great for voiceovers and recording. I am a live streamer on Twitch and I use this as my daily driver for my weekly streams. I have never had a problem with it. Bass is great, and all other sound sounds crisp and clear. A LOT better than my previous, clip-on mic. Top of the line for under $500 - $800 I would say



    Go-To Vocal mic


    This has become my favorite mic in it's price range, for sure. I started using this for vocals and haven't looked back. The response is very crispy, a great high-mid responsiveness and it's high-end is a makes it sound just the perfect amount of airy. If you don't like that, you can always dial back the the highs using an EQ. All-in-all it makes a great vocals vocal mic. If you get a pair, it makes for a great spaced pair set for the drums or even piano. It captures the low-end nicely, as well. Versatile mic. Recommend for any studio.


    this mic sounds amazing


    when i got it i thought "can be better than my neumann tlm102" well i was wrong sounds 50 times better than my neunann i love it.

    Kansas City, MO, USA

    Semi Versatile


    The build quality of this microphone seems very sturdy and solid. For sound quality, on the good side, this microphone works very well for high pitched instruments / bright formants. It adds more body to the lows and helps high instruments have more dynamic range. If you were just recording high pitched sources, then this is a great option. On the down side, this microphone does not handle low instruments / low formants at all. That low boost it gives will ruin the sound for low instruments. It's rough sounding and adjusting the microphone angle doesn't seem to help anything. So in all, this microphone is good for certain applications but definitely not low pitched sources.

    Los Angeles, CA, USA

    Excellent utility mics. Great to have a pair lying around.


    This microphone is one of those go anywhere do anything mics. It sounds good on lots of sound sources and also does an excellent job. I have used this mic for my sax recordings on albums, flutes, clarinets, guitar amps, pianos, and much more. It has a very even clean sound that is very easy to work with. It is not particularly colored or weighted mic, but it does have a slightly brighter sound than the at4047, which is also an excellent mic. So this mic tends to respond better to sound sources where clarity and bright sounds are preffered. (Strings, Piano, Room Micing, Cymbals) All in all this is a great all around studio mic that works great in a wide variety of applications. And the price is very good to boot.

    Cottage Grove, OR 97424, USA

    Solid Performer at Any Price


    I have had my 4040s (2) for 3 years and have been very pleased with their solid performance rugged build and sonic quality. I use them in x/y and ORTF stereo configuration and have been very pleased with the sound stage these produce. What's amazing is a demo a fellow engineer showed when he tested a random pair of 4040s and 4050s and their response was with in 2dB of each other along the entire curve. WOW - exceptional!

    Atlanta, GA, USA

    AT4040 Cardioid Condenser Microphone

    4.1 8


  • Q & A

    How can I purchase another felt pouch for the AT 4040?


    Thank you for your inquiry. Please contact our Parts Department at 330-686-2600 ext. 5002. They would be happy to help you.


    Hello, when would I choose to use AT4033 vs AT4040?


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


    I'd like to buy one AT4040 Microphone, and i'd like to know which desk stand should i use. And do i still need any connecting devices.


    Thank you for your inquiry. A shock mount is provided. Something like a broadcast arm would be a nice mount. If connecting to a computer you need an audio interface with 48V phantom power.


    Does this AT 4040 condenser mic includes a shock mount?


    Yes, the AT4040 includes the AT8449a Shock Mount.


    I have a PreAmp (ART Pro MPA II) that has a setting for impedance and it goes from 150 all the way up to 3K. What is a typically good way to decide where to set this when using the AT4050 for vocals?


    In order to transfer the maximum amount of voltage from the microphone to the preamp, set the preamp to the highest setting of 3000 ohms.


    Is this a lxr mic or usb mic?


    Thank you for your inquiry. This is an XLR connector, not USB.


    I am looking for a microphone to record lead trumpet with and I am curious if this would be the right microphone for me?


    Thank you for your inquiry. Yes, this would be a great microphone for trumpet. Please see the video at this link for micing a trumpet. Please note in the video we are using an AT4050, which is another good microphone for this application.


    Is there a separately purchaseable windscreen for the AT4040?


    The AT8137 will work with the AT4040.


    I'm having trouble with getting my mic to work. I have an xlr to usb adapter that connects to my Lenovo 570 laptop. I've gone into the settings and made sure that the mic is enabled and all that stuff. As far as I can see there is no on/off button on the mic. I'm not very good with this stuff, so forgive my ignorance, but is there any way to get this mic to work that I haven't tried yet.


    The AT4040, being a condenser microphone requires phantom power and an XLR to USB cable will not provide that. You may find helpful information on this subject here: Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at for additional assistance with this.


    What kind of connecting cable should I use to connect the mic with my interface?


    Being a condenser microphone, you will need to provide phantom power to the microphone and you may use an inline audio interface. Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at for additional assistance with this.