Technical Data - Sennheiser HD400 Instructions For Use Manual

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
142
HMEC 300 HMEC 302
dynamic
circumaural, closed
45–15,000 Hz
300/150 , mono
600/300 , stereo
> 25 – 40 dB
120 dB ( 5%)
approx. 10 N
electret mic capsule, noise-compensated, MKE 45-1
300–5,000 Hz
–
120 dB
150
400 mV 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)
HMEC 306 HMEC 400