The Q400 is a directional electret boundary layer microphone. It is designed to be
connected to unbalanced microphone inputs with bias powering such as those
found on the Ampetronic and ILD100 & CLD1 induction loop amplifiers. The unit is
directional when properly mounted, so it can reduce unwanted sound pickup from
sources that are not in front of the microphone.
Restrictions on usage
The Q400 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.
Boundary Microphone
Q400
1. Mounting
Boundary layer microphones are intended for mounting on
a surface. The surface forms a part of the pickup pattern
of the microphone. The surface should not be subject to
strong vibration as this can be picked up by the
microphone.
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 not pick up unwanted
sounds when choosing where to put the unit.
2. Output connection.
The Q400 is terminated in a 3.5mm mono jack plug. This should be plugged into
the microphone input of the or ILD100 or CLD1 To connect the Q400 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. Using an Ampetronic MAT1,
output cable length can be extended using balanced cables.
3. Specification :
Sensitivity ............................. -67dB 4dB (0dB=1V/bar)
Impedance............................ approx. 2k
W
Directivity.............................. Hypercardioid directional
Frequency Range................. 300Hz - 6.5kHz (optimised for voice)
Bias Voltage Range.............. 1V to 10V
Normal Bias Voltage............. 1.5V
Current Consumption .......... 0.5mA Max.
Signal to Noise Ratio............ >60dB
Dimensions........................... 43 x 23 x 12mm
Cable Length ........................ 1.8 metres, screened flexible cable
Cable Connector .................. Mono 3.5mm jack
Colour................................... Black
Weight ................................. 8g excluding cable
The Q400 is manufactured in Europe for Ampetronic Ltd.
Warranty Information
This product carries a 1 year parts and labour warranty which could be
invalidated if these instructions are not followed correctly, or if the unit is
tampered with in any way.
The 1 year warranty is dated from the time the equipment leaves Ampetronic
and NOT when it is installed.
EC Certificate of Conformity available on request.
UP10008-6
Ampetronic Ltd,
Northern Road, Newark,
Nottinghamshire, NG24 2ET
United Kingdom
Tel: +44 (0) 1636 610062 Fax: +44 (0) 1636 610063
www.ampetronic.com Email: [email protected]
