Manuals / Sennheiser / Home Audio / Headphones

Sennheiser 250 Specifications, General data, Headphones, Transducer principle, Ear coupling

Models: 250

1 26

Download 26 pages 59.79 Kb

Page 22

Image 22

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

Page 22

Image 22

Sennheiser 250 instruction manual Specifications, General data, Headphones, Transducer principle, Ear coupling

Contents

Notice d‘emploi Istruzioni per l‘uso HMECInstrucciones de uso Gebruiksaanwijzing Contents Important safety instructions Safety instructions for batteries Delivery includes The HMEC 250 headset TalkThrough function Additional featuresySeparate left and right channel volume control yGood passive attenuation of ambient noiseOperating elements TT VOLUME + buttonTT VOLUME - button TalkThrough buttonMeanings of the LED MeaningLED indications NoiseGard 2.0 operationPreparing the headset for use Connecting the headsetConnector Inserting the batteriesConnecting a mobile telephone The 2.5 mm jack socket allows you to connect a mobile telephone. For this purpose, the microphone plug must be connected to the aircraft radio/intercom. A suitable adapter for your mobile telephone with 2.5 mm jack socket is available from your Sennheiser agentConnecting an additional audio player Hearing damage due to high volumesSwitching between mono and stereo mode Adjusting the microphone sensitivityTo change the input sensitivity of the microphone Adjusting the headset Using the headsetAttaching the cable clip Adjusting the volume CAUTION! Hearing damage due to high volume levelsPress the TT VOLUME + button Switching the TalkThrough function on/offAdjusting the volume of the TalkThrough function To increase the volume of the TalkThrough functionSwitching NoiseGard on/off – the LED lights up red andReplacing the batteries Always replace the two batteries at the same timeFolding up the headset Care and maintenance Replacing the earpadsAccessories and spare parts Replacing the wind shieldGeneral data SpecificationsHeadphones Transducer principle¼” 6.35 mm jack plug Connector assignmentMicrophone incl. preamplifier 5.25 mm jack plugManufacturer declarations CE Declaration of Conformity Publ. 06/07 516578/A02