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 mono

 

300 stereo

Nominal impedance active

600 mono

 

1,200 stereo

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Sennheiser HMEC 250 instruction manual Specifications, General data, Headphones