Desktop Microphone
ACDTMIC
The ACDTMIC is a directional electret microphone. It is designed to be connected
to unbalanced microphone inputs with bias powering such as those found on the
Ampetronic ILD100 and CLD1 induction loop ampliers. The unit is directional
so it can reduce unwanted sound pickup from sources that are not in front of the
microphone.
Restrictions on usage
The ACDTMIC should not be directly connected to balanced or line level inputs. It
should only be connected to inputs intended for unbalanced electret microphones
with DC bias power.
1. Mounting
The microphone should be placed so that
it points towards the wanted sound source
(e.g. the receptionist at a counter) and is
reasonably close to that source. Take care to
ensure that the microphone does pick not up
unwanted sounds when choosing where to put
the unit.
2. Output connection
The ACDTMIC is terminated in a 3.5mm
mono jack plug. This should be plugged into
the microphone input of the ILD100 or CLD1.
To connect the ACDTMIC to a balanced
microphone input, the Ampetronic MAT1
adapter should be used with phantom power
on the amplier.
Any extension up to 3 metres total cable
length should be made using a screened cable and good quality connectors. Under
no circumstances should the output cable be extended beyond a total length of 3m
as the extended connection would be susceptible to interference. The output via the
MAT1 can be extended using balanced cables with XLR connectors without length
limits
