Care And Maintenance - Sennheiser EVOLUTION WIRELESS EW 300 Instruction Manual

... for optimum reception
Transmission range depends 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.
If, with the EM 300 receiver, reception conditions are unfavourable, you
should use two remote antennas which are connected via antenna cable
(u "Accessories").
To avoid HF-overmodulating the receiver, observe a minimum distance
of 5 m between transmitting and receiving antennas.
Observe a minimum distance of 50 cm between receiving 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, interference can be avoided
by maintaining a minimum distance of 20 cm between two transmitters.
Use special accessories for multi-channel applications (u "Accessories").
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Care and maintenance

SKM 300 hand-held transmitter
The SKM 300's sound inlet basket should be cleaned from time to time.
Unscrew the inlet basket (turn counter-clockwise) and remove it.
Use a damp cloth to clean the inlet basket from the inside and outside.
Note:
Do not use any cleasing agents or solvents. Do not touch the
microphone's contacts.
Replace the inlet basket on the SKM 300 and screw it tight (taking
care not to loose the coloured identification ring).
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