beyerdynamic DT 990 PRO vs Sennheiser HD 25

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DT 990 PRO compared with HD 25

	beyerdynamicDT 990 PRO	SennheiserHD 25
Overview
Released
Released	1985	1988
Sound
Type
Type	Over-ear	On-ear
Noise cancelling
Noise cancelling	No	No
Back
Back	Open	Closed
Impedance
Impedance	80 ohms	70 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	Dynamic, open; 5 – 35,000 Hz; nominal sound pressure level 96 dB; 80 or 250 ohms	Dynamic, closed, with lightweight aluminium voice coils; 16 – 22,000 Hz; max. SPL 120 dB; THD < 0.3% at 1 kHz; load rating 200 mW
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	250 g	140 g (better)
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Circumaural, open-back; velour ear pads; headband pressure approx. 3.5 – 5.5 N	On-ear (supra-aural), closed-back; contact pressure approx. 2.5 N; split headband; rotatable capsule for single-ear listening
Works with
Works with	3.5 mm plug with 6.35 mm adapter; 3 m straight cable (80 ohms) or 3 m coiled cable (250 ohms)	Detachable single-sided cable, approx. 1.5 m, with 3.5 mm plug; screw-on 3.5 to 6.3 mm adapter
In the box
In the box	–	HD 25 headphones, detachable 1.5 m cable, screw-on 3.5 to 6.3 mm jack adapter, safety instructions