Sennheiser P/N 025-250-015 User Manual download pdf (Page 6)

Technical data

Headphone

Transducer principle dynamic, closed

Coupling to the ear supraaural

Transmission range 30-16.000 Hz

Rated impedance 600 Ω (2 x 1.200 Ω parallel)

Frequency characteristic 97 dB ± 3 dB at 1 kHz, 1 mW

THD < 1 %

Load rating 200 mW

Microphone incl. preamplifier

Transducer Back electret-condenser capsule

noise compensated

Transmission range 300-5.000 Hz

Max. sound pressure level 120 dB

Output voltage 400 mV ± 3 at 114 dB

(as per RTCA/DO-214)

Load impedance 150 Ω

Supply voltage typ. 16 V DC,

(8-16 V DC; approx. 8-25 mA

as per RTCA/DO-214)

General data

Weight without cable approx. 170 g

Connecting cable single-sided, length: 1.8 m

Connection plug 3-pole 1/4" (6.35 mm) jack plug,

wired mono, for headphone

PJ-068, 5.25 mm for microphone

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

Mic Gain Adjustment

small slotted screwdriver and

turn the ‘Mic Gain Adjustment’

screw (see illustration on the

left) until you have reached the

desired setting.

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Sennheiser P/N 025-250-015 User Manual Page 6