Audio-Technica ATH-M40x vs beyerdynamic DT 1770 PRO

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ATH-M40x compared with DT 1770 PRO

	Audio-TechnicaATH-M40x	beyerdynamicDT 1770 PRO
Overview
Released
Released	February 2014	September 2015
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Driver size
Driver size	40 mm	45 mm
Back
Back	Closed	Closed
Impedance
Impedance	35 ohms	250 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	Dynamic, 40 mm with neodymium magnets and copper-clad aluminium wire voice coils; tuned flat; 15 – 24,000 Hz; sensitivity 98 dB; maximum input power 1,600 mW at 1 kHz	45 mm Tesla dynamic drivers, closed; 5 – 40,000 Hz; 102 dB SPL (1 mW, 500 Hz); max. 125 dB SPL (200 mW, 500 Hz); THD < 0.05% (1 mW, 500 Hz); rated power handling 200 mW
Noise cancelling detail
Noise cancelling detail	–	No active noise cancelling; passive attenuation approx. 18 dBA with velour ear pads, approx. 21 dBA with leatherette
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	240 g (better)	388 g
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Circumaural, closed-back; earcups swivel 90 degrees; collapsible	Circumaural, closed-back; nominal headband pressure approx. 7.2 N; spring steel headband; replaceable headband padding and ear pads, velour and black leatherette sets supplied
Works with
Works with	Detachable 1.2 – 3.0 m coiled and 3.0 m straight cables with gold-plated 3.5 mm plugs; screw-on 6.3 mm adapter	3 m straight cable and 5 m coiled cable (extended), detachable, with a 3-pin mini-XLR connector on one side; gold-plated 3.5 mm stereo jack with 6.35 mm adapter (the manual; beyerdynamic's product page lists a 6.35 mm jack plug)
Colours
Colours	Black	–
In the box
In the box	ATH-M40x headphones, two cables, screw-on 6.3 mm adapter, pouch	Headphones, velour ear pads, black leatherette ear pads, 3 m straight cable, 5 m coiled cable, hard case