Sennheiser HD400 manual General data, Hmec

		HMEC 300		HMEC 302	HMEC 306	HMEC 400
General data
Connecting cable			1.5 m, unilateral
Weight without cable
			370 g
Power supply for NoiseGard™		12–35 V DC
Current consumption	27 mA (zero signal current), max. 80 mA
Fuse			500 mA thermo fuse
Connectors
			6.35 mm stereo jack plug	6.35 mm stereo jack plug	6-pin Redel plug for	6.35 mm stereo jack plug
			for headphones,	for headphones,	headphones, microphone	for headphones,
			PJ-068 jack plug for	PJ-068 jack plug for	and NoiseGard™	PJ-068 jack plug for
			mirophone,	microphone and		mirophone,
			XLR-3 for NoiseGard™	NoiseGard™		XLR-3 for NoiseGard™
Controls
			Mono/Stereo switch
			On/off switch for NoiseGard™
			Volume control for headphones
Temperature range			Operation	–15°C ... + 55° C
			Storage	–55°C ... + 55° C
Operating time Battery pack
			with batteries (four 1.5 V AA size alkaline-manganese batteries): approx. 15 hours
			with rechargeable batteries: approx. 3 hours

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