The Ampetronic 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 amplifiers.

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 amplifier.

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.

Ampetronic product code: ACDTMIC

Specification:
Polar Pattern: Cardioid
Frequency Response: 30Hz – 16kHz
Sensitivity: -65dB
Impedance: 680Ω
Operating Voltage: 1.5V – 9V DC
Cable Length: 2.4m
Weight: 420g including cable
Dimensions: Base diameter 84mm
Gooseneck length 355mm (semi-rigid)