Sennheiser 250 instruction manual Microphone incl. preamplifier, Connector assignment

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Sound pressure level passive	98 dB at 1 kHz, 1V
active	100 db at 1 kHz, 1 V
THD at 94 dB SPL	< 1 %
Attenuation	13–34 dB passive
	attenuation, plus
	16–25 dB active noise
	compensation at
	low frequencies
Contact pressure	approx. 5 N

Microphone incl. preamplifier

Type	MKE 46
Transducer principle	pre-polarized
	condenser microphone,
	noise-compensating
Frequency response	350–6,000 Hz
Output voltage	40 mV/Pa (factory pre-set)
	= 400 mV at 114 dB SPL
	(adjustable from 17–100 mV/Pa)
Terminating impedance	150–2,200 Ω
Supply voltage	8–16 V DC
Connector assignment
¼” (6.35 mm) jack plug	5.25 mm jack plug
1 Audio Hi left	1 not assigned
2 Audio Hi right	2 Microphone Hi
3 Audio Lo	3 Microphone Lo

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Contents Hmec Contents Important safety instructions Not in use Delivery includes Hmec 250 headset Page TalkThrough button TT Volume + buttonTT Volume button Operating elementsLED indications Inserting the batteries Connecting the headsetPreparing the headset for use Connecting a mobile telephone Connecting an additional audio player Switching between mono and stereo mode Adjusting the microphone sensitivityAttaching the cable clip Using the headsetAdjusting the headset Adjusting the volume Press the TT Volume + button Switching the TalkThrough function on/offAdjusting the volume of the TalkThrough function Switching NoiseGard on/off Replacing the batteries Folding up the headset Replacing the earpads Care and maintenanceReplacing the wind shield Accessories and spare partsGeneral data SpecificationsHeadphones Microphone incl. preamplifier Connector assignmentManufacturer declarations