Sennheiser HMD120 Service Manual download pdf (Page 20)

Technical data

HME 100 HME 105 and HME 120 HMD 120

Headphones

Transducer principle dynamic

Ear coupling circumaural, closed

Frequency response 45–15,000 Hz

Nominal impedance 150 Ω, mono, 300 Ω, stereo 150 Ω, mono 16 Ω, mono

Attenuation > 10–40 dB

Contact pressure approx. 10 N

Microphone incl. preamplifier

Transducer principle electret mic capsule, electret mic capsule, dynamic,

noise-compensated noise-compensated noise-compensated

MKE 45-1 MKE 45-1 M-87/AIC

Frequency response 300–5,000 Hz 300–5,000 Hz 500–4,000 Hz

Sensitivity – – 1.8–4 µV/74 dB bei 5 Ω

Max. sound pressure level 120 dB 120 dB –

Min. terminating impedance 150 Ω 150 Ω –

Output voltage 400 mV ± 3dB 400 mV ± 3dB –

at 114 dB at 114 dB 

(as per RTCA/DO 214) (as per RTCA/DO 214) 

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Sennheiser HMD120 Service Manual Page 20