Closed-Back Circumaural Headphones with 40mm Neodymium Magnet Drivers, Straight Cable, and 1/4" Adapter
 
Audio-Technica ATH-M20x Headphones Features at a Glance:
Robust build quality and advanced technology
15Hz-20kHz frequency response
40mm drivers with rare-earth neodymium magnets and copper-clad aluminum wire voice coils
Tuned for enhanced low-frequency performance
Circumaural design contours around the ears for excellent isolation in loud environments
Optimized for studio tracking and mixing
 
Tech Specs
Type:   Wired 
Open/Closed:   Closed 
Fit Style:   Circumaural (Around the Ear) 
Driver Size:   40mm 
Noise Attenuation:   Passive Noise Isolating 
Frequency Response:   15Hz-20kHz 
Impedance:   47 ohms 
Connectivity:   1/8", 1/4" adapter 
Cable Type:   Straight 
Cable Length:   9.8' 
Features:   Swivel Earcup 
Color:   Black 
Weight:   0.42 lbs. (without cable and connector) 
Manufacturer Part Number:   ATH-M20x