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1716
boom
microphone
headphone
capsule (left)
compensation
microphone (left)
compensation
microphone (right)
headphone
capsule (right)
compensation
circuit (right)
6-pin
Redel
plug
microphone
amplifier
compensation
circuit (left)
PJ 068
plug
6,35 mm
plug
boom
microphone
headphone
capsule (left)
compensation
microphone (left)
compensation
microphone (right)
headphone
capsule (right)
compensation
circuit (right)
microphone
amplifier
compensation
circuit (left)
HMEC 25-6A block diagram
HMEC 25-KAP-2 block diagram
Technical data NoiseGard
™
HMEC 25-6A / -KAP-2
Headphone
Transducer principle dynamic, open, supra-aural
Frequency response 16 Hz - 22 kHz
Impedance active/passive 200 / 180 Ω (mono)
400 / 360 Ω per side (stereo)
same volume for active and passive
THD < 1 %
Compensation active 15 dB ± 3 dB between 100 Hz and 2 kHz
Frequency response of
the active compensation 50 - 600 Hz
Microphone incl. preamplifier
Transducer principle Noise-compensated back-electret condenser
microphone capsule
Frequency response 300 Hz - 5 kHz (as per RTCA/DO-214)
Max. sound pressure level 120 dB
Output voltage 400 mV ± 3 dB at 114 dB
and a distance of 6 mm
(as per RTCA/DO-214)
Terminating impedance 150 Ω
Operating voltage typ. 16 V DC, approx. 8 - 25 mA,
connections as per RTCA/DO 214
General data
Contact pressure approx. 2.5 N
Weight without cable 170 g
Cable single-sided, total length 1.8 m
Connectors HMEC 25-6A: 6-PIN Redel
HMEC 25-KAP-2: headphone: 6.35 mm (1/4") jack plug
microphone: PJ-068, 5.25 mm
Power supply NoiseGard™- 12 - 35 V DC
Current consumption typ. 18 mA