Sennheiser HD400 manual Technical data, Headphones, Microphone incl. preamplifier, Hmec

Technical data

Headphones

Transducer principle Ear coupling Frequency response

Nominal impedance active/passive

Attenuation (active and passive) Max. sound pressure level Contact pressure

Microphone incl. preamplifier

Transducer principle

Frequency response

Sensitivity

Max. sound pressure level Min. terminating impedance Output voltage

Supply voltage

HMEC 300 HMEC 302 HMEC 306 HMEC 400

dynamic

circumaural, closed 45–15,000 Hz 300/150 Ω , mono 600/300 Ω , stereo

>25 – 40 dB

120 dB (± 5%) approx. 10 N

electret mic capsule, noise-compensated, MKE 45-1 300–5,000 Hz

–

120dB

150Ω

400mV ± 3 dB at 114 dB (as per RTCA/DO 214)

typ. 16 V DC (8 – 16 V DC, approx. 8 – 25 mA, as per RTCA/DO 214)

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