beyerdynamic DT 1770 PRO MKII vs Sennheiser HD 620S

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DT 1770 PRO MKII compared with HD 620S

	beyerdynamicDT 1770 PRO MKII	SennheiserHD 620S
Overview
Released
Released	October 2024	June 2024
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Driver size
Driver size	45 mm	38 mm
Back
Back	Closed	Closed
Impedance
Impedance	30 ohms	150 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	TESLA.45 dynamic drivers, made in Heilbronn, closed; 5 – 40,000 Hz; 95 dB SPL (1 mW, 500 Hz), 110 dB SPL (1 V, 500 Hz); THD at 1 mW 0.20% at 100 Hz, 0.04% at 500 Hz, 0.1% at 1 kHz; power handling 100 mW short-term, 30 mW continuous	Dynamic, closed; 42 mm angled transducers with 38 mm diaphragm and 150-ohm aluminium voice coil, made in Tullamore, Ireland; 6 Hz – 30 kHz; 110 dB SPL (1 Vrms); THD < 0.05% (1 kHz, 90 dB SPL); steel plate closing off the back volume
Noise cancelling detail
Noise cancelling detail	No active noise cancelling; passive attenuation 25 dBA	–
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	377 g	326 g (better)
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Circumaural, closed-back; spring steel headband with memory foam pad and fontanelle recess; nominal headband pressure 6 ± 0.5 N; replaceable headband pad and ear pads (velour with slight bass boost, leatherette for linear sound)	Over-ear (around the ear), closed-back; artificial leather ear pads with internal venting; steel-reinforced headband sliders and ear cup covers; weight 326 g without cable, from Headfonics (Sennheiser doesn't publish it)
Works with
Works with	3 m straight and 5 m coiled PRO X cables, detachable, with a lockable 3-pin mini-XLR connector on one side; gold-plated 3.5 mm stereo jack with 6.35 mm adapter	Detachable 1.8 m twist-lock cable with 3.5 mm plug and locking screw; screw-on 3.5 mm to 6.3 mm adapter; optional balanced 4.4 mm cable
Colours
Colours	Black	–
In the box
In the box	Headphones, velour ear pads, leatherette ear pads (each with acoustic disc), 3 m straight cable, 5 m coiled cable, hard case	HD 620S headphones, 1.8 m cable with 3.5 mm plug, 3.5 to 6.3 mm adapter; the launch press release also lists a storage pouch