User manual
Operating instructions
AVL645CD Earset microphone
Item no.
1268705
Intended use
This microphone is designed to convert acoustic signals (sound waves) into electrical signals.
It can be used for announcements and interviews, as a hands-free microphone or for Internet
and multimedia communication. The exible head strap allows the microphone to be adjusted for
dierent head sizes and speaking positions. The microphone can also be secured to clothing using
a clip. The low-level audio output signal must only be connected to suitable microphone inputs on
audio devices.
Contact with moisture, e.g. in bathrooms, must be avoided under all circumstances.
For safety and approval purposes (CE), you must not rebuild and/or modify this product. If you
use the product for purposes other than those described above, the product may be damaged. In
addition, improper use can cause hazards such as short circuiting, re, electric shock etc. Read
the instructions carefully and keep them. Make this product available to third parties only together
with its operating instructions.
This product complies with the statutory national and European requirements. All company names
and product names are trademarks of their respective owners. All rights reserved.
Delivery content
• Earset microphone
• Windscreen
• Clip
• Operating instructions
Safety instructions
Read the operating instructions carefully and especially observe the safety
information. If you do not follow the safety instructions and information on proper
handling in this manual, we assume no liability for any resulting personal injury or
damage to property. Such cases will invalidate the warranty/guarantee.
• The device is not a toy. Keep it out of the reach of children and pets.
• Do not leave packaging material lying around carelessly. These may become
dangerous playing material for children.
• Protect the product from extreme temperatures, direct sunlight, strong jolts, high
humidity, moisture, ammable gases, vapours and solvents.
• Do not place the product under any mechanical stress.
• If it is no longer possible to operate the product safely, take it out of operation and
protect it from any accidental use. Safe operation can no longer be guaranteed if
the product:
- is visibly damaged,
- is no longer working properly,
- has been stored for extended periods in poor ambient conditions or
- has been subjected to any serious transport-related stresses.
• Please handle the product carefully. Jolts, impacts or a fall even from a low height
can damage the product.
• When using the product, make sure that the cable is not pinched, kinked or damaged
by sharp edges.
• Also observe the safety and operating instructions of any other devices which are
connected to the product.
• Consult an expert when in doubt about operation, safety or connection of the device.
• Maintenance, modications and repairs are to be performed exclusively by an
expert or at a qualied shop.
• If you have questions which remain unanswered by these operating instructions,
contact our technical support service or other technical personnel.
Operation
The product must only be connected to suitable microphone inputs in order to
avoid distortions or mismatches that could cause damage to the microphone or the
connected audio device. Pay attention to the connection values in the "Technical
data".
Never direct the microphone at the sound outlet of loudspeakers, as this can result in
feedback which may damage the loudspeakers and the connected amplier.
a) Securing the microphone
1. Place the earset microphone over your head and secure it with the ear hooks. Adjust the
microphone to the desired speaking position. Ensure that the product sits in a secure position.
2. You can place the microphone on the left or right side of your head as required.
3. In order to move the microphone from one side of your head to the other, remove the
microphone by pulling it out from the eyelet on the ear hook.
4. Then insert the microphone in the correct orientation into the eyelet on the other side. Ensure
that it clicks into place properly.
5. If you do not want to use the ear hook, remove the microphone from the eyelet on the ear hook
and insert it into the clip provided. You can then attach the microphone to your clothing, such
as a tie or collar.
6. You can feed the microphone cable through clothing or holes in accessories. In order to do
so, remove the cable from the microphone that has already been installed. Ensure that both
arrows form a line when reconnecting the microphone and the cable connector.
Be careful when connecting that you do not bend or break the contacts on the
connector.
b) Using the microphone
1. Turn o the audio device to which the microphone will be connected. Turn the sensitivity of
your audio device to zero using the corresponding input level control (refer to the operating
instructions of the audio device you are using).
2. Insert the 3.5 mm jack plug on the microphone cable into the corresponding microphone
connection on your audio device.
3. Turn on your audio device with the connected sound source (loudspeakers).
4. Test the microphone by speaking a few words (e.g. counting whole numbers) whilst slowly
moving the input level control on the audio device upwards until the desired output volume
is reached.
Air movements such as wind, moving the microphone or breathing create deep
frequencies in the sound spectrum. The attached windscreen made of sponge
prevents such sounds from being recorded.
Maintenance and cleaning
• The product does not require maintenance except for occasional cleaning.
• Under no circumstances should you service any of the components in the interior of the device,
therefore never open it.
• Before cleaning, remove the 3.5 mm jack plug from the connected audio device.
• Use a soft, antistatic and lint-free cloth to clean the device. Dust can be removed easily using a
soft and clean long-haired brush and a vacuum cleaner.
• Do not use any abrasive or chemical cleaning materials.
Disposal
Electronic devices are recyclable waste and must not be disposed of in the household
waste.
At the end of its service life, dispose of the product according to the relevant statutory
regulations.
WEEE registration no. DE28001718
You thus full your statutory obligations and contribute to the protection of the environment.
Technical data
Operating voltage.........................................1 – 10 V/DC
Frequency response .................................... 100 Hz - 18000 Hz
Sensitivity ...................................................... -65 dB ±3 dB (0 dB=1 V/µbar at 1000 Hz)
Impedance ....................................................600 Ω ±30 % (at 1000 Hz)
Directivity ......................................................Cardioid
Connection .................................................... 3.5 mm jack plug
Cable length .................................................. 1.05 m
Operating conditions ................................... -20 to +60 °C, <95 % RH
Storage conditions.......................................-20 to +60 °C, <95 % RH
Dimensions (L x W x H) ...............................154 x 160 x 62 mm
Weight ............................................................ 32 g
Frequency response
Directivity
Distributed by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microlming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication represent the
technical status at the time of printing.
© Copyright 2014 by Conrad Electronic SE. V1_1114_02-DS