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Black over-ear headphones with 40 mm drivers, swiveling earcups and a coiled cable

Audio-Technica

Audio-Technica ATH-M40x 40 mm headphone

SKU CH-3DJY-JS9KB MPN ATH-M40x

Closed-back monitor headphones with 40 mm drivers tuned flat from 15 Hz to 24 kHz for accurate studio tracking and mixing

  • TypeHeadphone
  • ColorBlack
  • Driver Unit40mm
  • Frequency Response15Hz-24KHz
  • Input Impedance35 ohms
  • Power SupplyMaximum Input Power: 1,600 mW at 1 kHz
  • Flat response from 15 Hz to 24 kHz for accurate monitoring
  • 40 mm drivers with rare earth magnets and copper-clad aluminium voice coils
  • 98 dB/mW sensitivity delivers high output with low power
  • Circumaural design provides excellent sound isolation in loud environments
  • 90° swivelling earcups enable convenient one-ear monitoring

Professional monitoring headphones

The Audio-Technica ATH-M40x is a closed-back headphone built for studio tracking, mixing and DJ monitoring. Its 40 mm drivers use rare earth magnets and copper-clad aluminium wire voice coils to deliver a flat frequency response from 15 Hz to 24 kHz. The circumaural design contours around the ears to provide effective sound isolation in loud environments.

Passive isolation and efficient drive

With no active electronics the headphones add zero self-noise and draw no power from the source. Rated at 35 ohms impedance and 98 dB/mW sensitivity they reach high output levels from portable interfaces or studio consoles without strain. Maximum input power is 1600 mW at 1 kHz, giving ample headroom for transient peaks during monitoring sessions.

Swivel earcups and quarter-inch adapter

Each earcup rotates 90 degrees for convenient one-ear monitoring while recording or cueing. The bundle includes a protective carrying pouch and a screw-on 6.3 mm adapter so the fixed 3.5 mm plug fits professional audio gear without extra purchases. Weighing 240 g without cable the set remains comfortable during extended use.

Highlights

  • Flat response from 15 Hz to 24 kHz for accurate monitoring
  • 40 mm drivers with rare earth magnets and copper-clad aluminium voice coils
  • 98 dB/mW sensitivity delivers high output with low power
  • Circumaural design provides excellent sound isolation in loud environments
  • 90° swivelling earcups enable convenient one-ear monitoring

Specifications

BrandAudio-Technica
ModelATH-M40x
Part NumberAUD ATHM40X
TypeHeadphone
ColorBlack
Driver Unit40mm
Frequency Response15Hz-24KHz
Input Impedance35 ohms
Power SupplyMaximum Input Power: 1,600 mW at 1 kHz
Sensitivity98 dB/mW
Connector3.5 mm
Ear CouplingOver-ear
Weight240 g (8.5 oz), without cable and connector
Noise Cancellingsound_isolation
Wireless TypeNo
CompatibilityStudio Equipment, DJ Equipment
FeaturesCutting-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 degree 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
Package ContentsAccessories Included
Protective carrying pouch, 6.3 mm (1/4") screw-on adapter
Shipping weight1.36 kg
Package size432 × 356 × 127 mm

Questions about this item

How do I attach the 6.3 mm screw-on adapter to the 3.5 mm connector?

Screw the adapter clockwise onto the 3.5 mm plug until it seats firmly; the thread is fine, so cross-threading is the common mistake — start it straight and turn gently.

Which parts will wear out first and need replacement?

The professional-grade earpads and headband padding are the only consumable items; both are user-replaceable and available from Audio-Technica.

At what point does the 35 ohm impedance limit sustained high-volume use?

The 35 ohm load draws more current from portable sources, so battery-powered devices hit their voltage rail first and clip before the 1,600 mW driver limit is reached.

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