beyerdynamic DT 770 PRO vs Sennheiser HD 25

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DT 770 PRO compared with HD 25

	beyerdynamicDT 770 PRO	SennheiserHD 25
Overview
Released
Released	1985	1988
Sound
Type
Type	Over-ear	On-ear
Noise cancelling
Noise cancelling	No	No
Back
Back	Closed	Closed
Impedance
Impedance	80 ohms	70 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	Dynamic, closed, with bass reflex system; 5 – 35,000 Hz; nominal sound pressure level 96 dB; 32, 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	270 g	140 g (better)
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Circumaural, closed-back; replaceable ear pads (black leatherette on the 32-ohm version, silver-grey velour on the 80 and 250-ohm versions); 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; 1.6 m straight cable (32 ohms), 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