Sennheiser HMEC 250 instruction manual Specifications, General data, Headphones

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Specifications

General data

Weight without cable	approx. 285 g
Temperature range (operation)	-10 to +55 °C
Temperature range (storage)	-55 to +55 °C
Power supply for NoiseGard	2 x 1.5 V AAA size battery or
	2 x 1.2 V AAA size rechargeable
	battery
Cable length	1.85 m
Headphone connector	¼” (6.35 mm) jack plug
Microphone connector	5.25 mm jack plug
Additional features	NoiseGard on/off
	TalkThrough on/off
	TalkThrough Volume +/-
	mono/stereo switch
	line input
	mobile telephone input
	peak level protection
	fail safe operation
Headphones
Transducer principle	dynamic, closed
Ear coupling	circumaural
Frequency response
(headphones)	8–28,000 Hz
Frequency response
(TalkThrough)	300–5,000 Hz
Nominal impedance passive	150 Ω mono
	300 Ω stereo
Nominal impedance active	600 Ω mono
	1,200 Ω stereo

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Contents Hmec Contents Important safety instructions Not in use Delivery includes Hmec 250 headset Page Operating elements TT Volume + buttonTT Volume button TalkThrough buttonLED indications Preparing the headset for use Connecting the headsetInserting the batteries Connecting a mobile telephone Connecting an additional audio player Adjusting the microphone sensitivity Switching between mono and stereo modeAdjusting the headset Using the headsetAttaching the cable clip Adjusting the volume Switching the TalkThrough function on/off Adjusting the volume of the TalkThrough functionSwitching NoiseGard on/off Replacing the batteries Folding up the headset Care and maintenance Replacing the earpadsAccessories and spare parts Replacing the wind shieldHeadphones SpecificationsGeneral data Connector assignment Microphone incl. preamplifierManufacturer declarations