Sennheiser HD 25 vs Sony MDR-R10

Every spec side by side, from each maker's published figures.

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HD 25 compared with MDR-R10

	SennheiserHD 25	SonyMDR-R10
Overview
Released
Released	1988	1988
Sound
Type
Type	On-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Driver size
Driver size	–	50 mm
Back
Back	Closed	Closed
Impedance
Impedance	70 ohms	40 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	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	Dynamic dome-type drivers with bio-cellulose diaphragms; 20 Hz – 20 kHz stated response; 100 dB/mW sensitivity; 300 mW rated input and 1,000 mW maximum input
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	140 g (better)	400 g
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	On-ear (supra-aural), closed-back; contact pressure approx. 2.5 N; split headband; rotatable capsule for single-ear listening	Carved zelkova-wood housings, lambskin cushions and a self-adjusting carbon-fibre headband with magnesium hangers, described in Home Technology Review's contemporary review
Dimensions
Dimensions	–	Approximately 400 g without the cord, as specified in Sony's service manual
Works with
Works with	Detachable single-sided cable, approx. 1.5 m, with 3.5 mm plug; screw-on 3.5 to 6.3 mm adapter	Fixed 3 m cord and standard stereo plug; 6.3 mm plug with rhodium and gold plating described in Home Technology Review
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	Hard case, wiping cloth, earphone/headphone cleaning tissue, contact-cleaning tissue and manual