Adjusting The Microphone Gain; Technical Data; General Data - Sennheiser HME 25-KA-2 Instructions For Use Manual

Adjusting the microphone gain

According to JTSO approval C58a, the microphone output voltage is factory-
preset to 400 mV. If the microphone output voltage is too high or too low for
your intercom system, it can be re-adjusted on the microphone. To do so, use a
small slotted screwdriver and
turn the 'Mic Gain Adjustment'
screw (see illustration on the
left) until you have reached the
desired setting.

Technical data

Headphone
Transducer principle
Coupling to the ear
Transmission range
Rated impedance
Frequency characteristic
THD
Load rating
Microphone incl. preamplifier
Transducer
Transmission range
Max. sound pressure level
Output voltage
Load impedance
Supply voltage

General data

Weight without cable
Connecting cable
Connection plug
6
Mic Gain Adjustment
dynamic, closed
supraaural
30-16.000 Hz
600 Ω (2 x 1.200 Ω parallel)
97 dB ± 3 dB at 1 kHz, 1 mW
< 1 %
200 mW
Back electret-condenser capsule
noise compensated
300-5.000 Hz
120 dB
400 mV ± 3 at 114 dB
(as per RTCA/DO-214)
150 Ω
typ. 16 V DC,
(8-16 V DC; approx. 8-25 mA
as per RTCA/DO-214)
approx. 170 g
single-sided, length: 1.8 m
3-pole 1/4" (6.35 mm) jack plug,
wired mono, for headphone
PJ-068, 5.25 mm for microphone