Sennheiser ew 300 IEM, Instruction Manual

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Recommendations and tips
... for optimum reception
Transmission rangedepends to a large extent on location and can vary
from about 10 m to about 150 m. There should be a “free line of sight”
between transmitting and receiving antennas.
To avoid overmodulating the receiver, observe a minimum distance of
5 m between transmitting and receiving antennas.
Observe a minimum distance of 50 cm between antennas and metal objects
(such as cross members or reinforced-concrete walls).
... for multi-channel operation
You cannot use all adjustable frequency combinations simultaneously. The
factory-preset frequencies (presets), however, are intermodulation-free. If you
wish to program new frequency combinations, please contact your local
Sennheiser agent who will provide you with information on the correct
frequency choice.
When using several transmitters simultaneously, observe a minimum
distance of 40 cm between transmitting antennas.
Use special accessories for multi-channel applications ( “Accessories”).
When using the ew 300 IEM system in combination with radiomicrophone
systems, a minimum channel spacing of 8 MHz should be maintained to
avoid RF breakthrough between systems.
8 Care and maintenance
Use a damp cloth for cleaning the devices. Do not use any cleansing agents
or solvents as these could damage the surface of the equipment.