Sennheiser HD 600 vs Sennheiser HD 650

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HD 600 compared with HD 650

	SennheiserHD 600	SennheiserHD 650
Overview
Released
Released	1997	2003
Sound
Type
Type	Over-ear	Over-ear
Noise cancelling
Noise cancelling	No	No
Back
Back	Open	Open
Impedance
Impedance	300 ohms	300 ohms
Bluetooth codecs
Bluetooth codecs	None (wired)	None (wired)
Drivers
Drivers	Dynamic, diffuse-field equalised; 12 – 40,500 Hz (–10 dB); 97 dB SPL at 1 kHz (1 Vrms); THD ≤ 0.1% (1 kHz, 1 Vrms); long-term input power 0.2 W (DIN 45580)	Dynamic, diffuse-field equalised; 10 – 41,000 Hz (–10 dB); 103 dB SPL at 1 kHz (1 Vrms); THD ≤ 0.05% (1 kHz, 1 Vrms); long-term input power max. 500 mW (EN 60-268-7)
Battery
Listening time (maker's claim)
Listening time (maker's claim)	No battery (wired)	No battery (wired)
Design
Weight
Weight	260 g	260 g
Headphone cable
Headphone cable	Yes	Yes
Fit and ear tips
Fit and ear tips	Circumaural, open-back; contact pressure approx. 6.0 N	Circumaural, open-back; contact pressure approx. 6.0 N
Works with
Works with	Detachable 3 m oxygen-free copper cable with 3.5 mm plug; 3.5 mm to 6.35 mm adapter	Detachable 3 m oxygen-free copper cable with 6.35 mm plug; 6.35 mm to 3.5 mm adapter
In the box
In the box	HD 600 headphones with cable, 6.35 mm adapter	–