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Professional Monitor Headphones

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

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

  • Professional Monitor Headphones
  • over ear headphones
  • high quality headphone
  • over the ear headphones accessory
  • pro headphones cable
  • monitor headphone accessories
  • high quality headphones

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

  • Overview

    Pure. Professional. Performance.

    The M-Series ATH-M40x professional monitor headphones are tuned flat for incredibly accurate audio monitoring across an extended frequency range. Your studio experience is enhanced with superior sound isolation and swiveling earcups for convenient one-ear monitoring. Engineered with pro-grade materials and robust construction, the M40x excels in professional studio tracking and mixing, as well as DJ monitoring.

    More About the M-Series Headphones
    Critically acclaimed M-Series professional monitor headphones deliver accurate audio and outstanding comfort, perfect for long sessions in the studio and on the go. Contoured earcups seal tight for excellent sound isolation, with minimal bleed. And the pro-grade materials are durable, yet comfortable. Find out why online reviewers, top audio engineers, and cult followers agree, M-Series is an unmatched combination of audio and build-quality that gets the job done. Hour after hour, year after year.

  • Features

    • Cutting-edge engineering and robust construction

    • 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils

    • Tuned flat for incredibly accurate sound monitoring across the entire frequency range

    • Circumaural design contours around the ears for excellent sound isolation in loud environments

    • 90 swiveling earcups for easy, one-ear monitoring

    • Professional-grade earpad and headband material delivers more durability and comfort

    • Collapsible for space-saving portability

    • Detachable cable (includes 1.2 m - 3.0 m coiled cable and 3.0 m straight cable)

    • For professional studio tracking and mixing, as well as DJ monitoring
  • Specifications

    TypeClosed-back dynamic
    Driver Diameter40 mm
    Voice CoilCCAW (Copper-clad aluminum wire)
    Frequency Response15 - 24,000 Hz
    Maximum Input Power1,600 mW at 1 kHz
    Sensitivity98 dB
    Impedance35 ohms
    Weight240 g (8.5 oz), without cable and connector
    CableIncludes two interchangeable cables: detachable 1.2 m - 3.0 m (3.9' - 9.8') coiled cable and detachable 3.0 m (9.8') straight cable
    Accessories IncludedProtective carrying pouch, 6.3 mm (1/4") screw-on adapter

  • Downloads

    M-Series Headphones Brochure (pdf 3.11 M)
    Studio Headphones Microsite
  • Reviews

    Excellent sound quality


    Love the sound quality, hate the hardware design. Initially, I loved everything about them. However, after using them for almost 2 years. I've noticed some flaws. The sound quality is excellent, there's no doubt about it. Sharp, clean and deep bass. Even after 2 years the sound is still as at was when I first purchased. The only thing I don't like is the flimsy design, when it comes to manoeuvrability. It just feels cheap and doesn't match the high quality sound. The overall look of the headphones is nice. I like the matte black finish. It's just not the most durable material.



    Great Headphones for Great price


    i've owned these headphones for over 2 years now and they are amazing, still great sound, still comfortable, although the earpads are starting to wear out. not a single sign of them starting to break, and i'm using them everyday, even traveled with them for a time. all on all for the price some of the best headphones you can get

    Noord-Holland, Netherlands


    A Solid Pair of Soundie Boiis


    First and foremost, the sound quality of these fellas is stellar. While there are better headphones out there, this produces a beautiful sound balance with a comfortable range. I'm a huge fan of the multiple/interchangeable cords as different situations call for different connections, and it's relatively easy to switch them out without compromising the connection strength. I mostly use these for gaming, as they are fantastic for strategic gameplay that requires sound detection almost as much as visual. I've also listened to loads of music, as I am very familiar with music production and performance. I've never done any producing myself, so I can't give any insight into mastering and such, but I've had these headphones for almost two years and they have yet to fail me. Well, almost. These are studio headphones and are not necessarily designed for use with a smartphone. Thus, I quickly broke the driver in my pocket. That being said (and with phones promoting wireless connections more and more) you probably won't need to use these for that and it was more than easy to find a replacement online. Overall, these are a comfortable, quality pair of studios that will certainly last through anything from hours of gaming to producing records.

    Portland, OR


    I would buy this for a friend!!!!


    Things that are great about it 1. They are extremely comfortable 2. Durability 3. Foldable Things that are bad about it is 1. It comes with only 2 cables

    Boynton Beach,Florida


    Great sound, great value


    I use it for casual music listening and gaming, tested it out with Deezer Flac while it was avaiable and it held up great. Sound is flat and can be tuned with an equaliser to your liking afterwards, which is great. The only downside are the earpads, I had to replace mine with a more comfortable set. The clamp was a bit too tight as well but I manually loosened it a bit. Great product overall.

    DK Island


    RIP Headphone


    I've already sent this product back for repair twice and I think I broke it for the third time. Normal usage, never dropped it, still damaged in the same spot. The overall shipping cost almost reached the value of the headphone: I'm done.



    Best headphones I've ever had for the price.


    I've had these headphones for about a year and a half. I use them daily for several hours at a time, but I tend to leave them at the office and don't travel with them often so the potential of them breaking is probably lessened than most users. Regardless though, they're incredibly comfortable and have really great clarity. I'd strongly recommend them to anybody looking for decent headphones who doesn't want to break the bank.

    Decorah, IA


    avoid it


    Sound fidelity is good to great, but the headphone body is just poor in every aspect, a complicated folding mechanism flawed and poorly thought, very low reliability and durability in plastic parts and false leather, after a few months of use it just looks like a filthy rag covering your ears, shameful and in poor taste.

    Caracas, VE


    Pitch perfect!


    I know it is a monitoring headphone, but could have used a separate cable (HP-SC) with mic. That would have made it a prefect utility.

    Mumbai, India


    Unusable with one hand.


    They have no competition in their price range if sound is what you are looking for, but for me it is very annoying I cannot use them with 1 hand, something always clicks and closes. I think if they had only the 90° swiveling without collapsible ear-pads they had a stronger build, maybe had been cheaper and could have been used with one hand. I consider the collapsing feature rather a design flaw than a benefit considering I travel like 1000 times less then I put them on and off my head.



    ATH-M40x Professional Monitor Headphones

    4.1 29


  • Q & A

    Hello, my son has the Audio-Technica ATH-M40x headphones, he has a severe latex allergy. Is the plastic surround around the ear made of any latex material? Thanks!


    The Audio-Technica ATH-M40x Headphones are not made with any animal byproducts; the earpads are not leather. The earpads we use are made with a vinyl-based or polyurethane-based material that we refer to as leatherette. Please note that we no longer use protein leather in any of our products. This was a company wide directive issued by Headquarters Quality Assurance Department in 2010.


    I don't see a left or right channel indicator. I assume these were designed to be worn with a left and right ear in mind? Or am I missing it on the headphones?


    Yes, there are a few ways to indicate the correct side. First, the cable will connect to the headphones on the left ear cup. Additionally, on the outside of the headband, you will notice a small dot/bump to indicate the left ear cup. Lastly, the left and right ear cups are labeled with the appropriate "L" and "R" on the inside of the headband, just below where the leatherette meets the plastic casing.


    If these were to be used to practice guitar in apartment complex would i be able to plug directly into guitar or do they require an amp?


    No, you would require a headphone amplifier of some sort.


    Is the headphone output, on the product, a TRS 6,3mm (1/4'') or a 3,5mm (1/8'')?


    You may contact your local Audio-Technica offices for further assistance.


    Are these headphones Bluetooth


    No they are not.


    Is the ATH m40x compatible with the Blue Yeti or Razer Siren X along with a ps4 without losing sound quality. I've been told using a splitter actually takes some quality away from the headphone sound.


    You may use the ATH-M40x headphones with any 3.5mm or 6.3mm headphone connection.


    i bought a pair of your headphones but it did not come with a cable to fit my I phone 7 plus I would also like to know if it has a blue tooth attachment?


    You may use the included HP-LC and HP-CC by removing the 6.3mm adapter at the end of the cable to connect to a 3.5mm connection such as in a smartphone.


    I have a brand new pair of AT-M40x headphones and only the right earphone produces sound. I have tried them with both of the included cables, locked in correctly, in multiple devices (that normal headphones are working with) and it is the same. I have misplaced my user manual and I can't find one anywhere online so I don't know what to do next.


    Thank you for your inquiry. Please contact our Service Department at 330-686-2600 ext. 5003. They would be happy to help you.


    Wondering if you guys do repairs?


    Please contact our Service Department at (330) 686-2600 ext 5003 or at for assistance with this.


    I would use this headphones with Focusrite Scarlett 2i2 2nd gen. Do I need any kind of power amp or something like that to use them with best sound


    You may contact Audio-Technica Europe for further assistance.