HME 45-6 - Communication headset SENNHEISER - Free user manual and instructions

Brand	SENNHEISER
Model	HME 45-6
Product type	Communication headset
Transducer principle (headphone)	Dynamic, open
Bandwidth (headphone)	20 Hz - 18 kHz
Impedance (headphone)	150 Ω (mono), 300 Ω (stereo)
Harmonic distortion (headphone)	< 1%
Transducer principle (microphone)	Back-electret capsule with noise compensation
Bandwidth (microphone)	100 Hz - 5 kHz
Output voltage (microphone)	-35 dBV/Pa
Supply voltage (microphone)	3.5 - 10 V DC
Weight (without cable)	140 g
Cable length	1.8 m (unilateral)
Connector	Free end
Earpiece pressure	Approx. 1.6 N
Delivery contents	Headset/microphone kit
Main functions	Hands-free communication for telephone switchboards, conference and interpretation
Maintenance and cleaning	Clean with a soft, dry cloth
Power supply	Microphone: 3.5 - 10 V DC (phantom or external power)

Frequently Asked Questions - HME 45-6 SENNHEISER

What are the variants of the HME 45 headset?

Variants include: HME 45-6 (free end), HME 45-C (XLR 5-pin connector), HME 45 telecom (Western 4-pin plug) and HMD 45-6 (dynamic microphone, free end).

How to connect the headset to a phone with a 121 TR 9-5 jack?

Use the HME 45 telecom variant. Plug the 4-pin connector into the intended jack (often marked with a headset symbol). The handset serves as a switch to start/end calls.

Can I use the HME 45-6 directly on my phone?

The HME 45-6 has a free end; you must connect a suitable connector for your application. See the wiring diagram on page 27 of the manual.

How to adjust the microphone?

Position the mic about 2 cm from the corner of the mouth. The mic shaft is flexible for optimal positioning.

What is the difference between HME 45-6 and HMD 45-6?

The HME 45-6 uses an electret microphone (requiring power), while the HMD 45-6 has a dynamic microphone (no power needed). The HMD has a different mic bandwidth (50 Hz - 12 kHz).

What is the headphone impedance?

The impedance is 150 Ω in mono and 300 Ω per side in stereo.

Is the headset compatible with conference systems?

Yes, the HME 45-6 is designed for telephone switchboards, conference and interpretation systems.

How to maintain the headset?

Clean it with a soft, dry cloth. Avoid solvents and moisture.

Does the microphone need power?

Yes, the electret microphone of the HME 45-6 requires a voltage of 3.5 to 10 V DC (usually supplied by the connected equipment).

What is the cable length?

The cable is unilateral and measures 1.8 m long.

USER MANUAL HME 45-6 SENNHEISER

Headset for connection to terminals in telephone exchanges and switchboards or to conference and interpretation systems. The headset is supplied with open-ended cable so that the user can choose the connector most suitable for the application. Please refer to page 27 for the wiring diagram.

HME 45-C

Headset for connection to terminals in telephone exchanges and switchboards or to conference and interpretation systems. This headset is supplied with a 5-pin XLR connector. Please refer to page 28 for the pin assignment of the XLR connector.

HME 45 telcom

Headset for connection to terminals in telephone exchanges and switchboards or to telephones with suitable socket (as per 121 TR 9-5 connection standard of the German Telekom). This headset replaces the receiver and leaves your hands free. Please refer to page 29 for the wiring diagram.

HMD 45-6

Headset with dynamic microphone. No external supply voltage necessary. The headset is supplied with open-ended cable so that the user can choose the connector most suitable for the application. Please refer to page 27 for the wiring diagram.

Connection of the HME 45 telcom to a telephone

In the ideal case, your telephone is fitted with a suitable socket for connecting the headset. Such a socket resembles the socket for the spiral cord of the receiver and is unconnected. Some manufacturers use a headphone symbol for it, others the designation „121 TR 9-5".

Connect the cable of your HME 45 telecom headset to this socket (see fig. 1).
The receiver remains on the cradle. You need it as a „switch“ at the beginning and the end of your phone call.

Please note for the HME 45 telcom

If your telephone has a headset socket not corresponding to the 121 TR 9-5 standard of the German Telekom, you have to have an adaptor made, or you have to use a new plug. Figure ② shows the wiring arrangement.

2

Some telephones (especially from German manufacturers) have a receiver socket suitable for the headset. In particular, this socket is able to supply the necessary operating voltage for the condenser microphone.

Please ask your telephone manufacturer whether you can directly connect a headset (fig. 3). He will need the circuit diagram and the technical data of your Sennheiser headset. Please photocopy pages 10 and 29 of these operating instructions for him.

3

Adjusting the microphone boom

Adjusting the headband

Cable and microphone on the left or the right

Cable on the left

Cable on the right

Technical data

Headphone

Transducer principle

Frequency response

Impedance

THD

dynamic, open

20 Hz - 18 kHz

mono: 150 stereo: 300 per side

<1%

Microphone

Transducer principle

Frequency response

(2 cm distance between mic and corner of mouth)

Output voltage

Operating voltage

HME 45-6 / HME 45-C / HME 45 telcom

noise-cancelling back-electret condenser microphone capsule

100Hz - 5kHz

HME 45 telcom: -40 dBV/Pa as per 121 TR 9-5

HME 45-6/ -C: -35 dBV/Pa

HME 45 telcom: 5 V DC

HME 45-6/ -C:3.5-10 V DC

Microphone

Transducer principle

Frequency response

(2 cm distance between mic and corner of mouth)

Output voltage

Impedance

HMD 45-6

Dynamic microphone

50Hz - 12kHz

0.5mV / Pa

200Ω

Other

Contact pressure

Weight (without cable)

Cable

Connector

approx. 1.6N

140g

single-sided, total length 1.8m

HME 45 telcom: 4-pin western connector

HME 45-C: 5-pin XLR connector

HME 45-6: open-ended cable

HMD 45-6: open-ended cable

1 headset

Supply schedule

Product variants

HME 45 telcom: 4-pin western connector

HME 45-C: 5-pin XLR connector

HME 45-6: open-ended cable

HMD 45-6: open-ended cable

HME 45-C: spina XLR a 5 poli

HME 45-C: spina XLR a 5 poli

HME 45telcom: 5 V DC

HME 45-6/-C:3,5-10 V DC

Microfoon

Omzetprincipe

microphone

headphone headphone capsule, capsule, left right

whi

Stromlaufplan

circuit diagram

Printed in Germany Publ. 2/98

59377/A03