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Repacing the CM16 microphone capsule

The microphone capsule consists of a thin metalized polyester film 
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the 
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way. 
Therefore, it is possible to remove or replace the grid by releasing 
the nuts on the front side (use the supplied 5.5 mm box spanner).

Due to its thin metalization, the diaphragm may deteriorate 
especially under humid conditions. Therefore, it is recommended to 
store the microphone in a dry place. Spare capsules are available 
on request and deteriorated diaphragms will be replaced by Avisoft 
Bioacoustics at a small fee. With some skill, it would also be 
possible to replace the membrane foil on your own (by releasing the 
screws on the back of the capsule).

The condenser microphone consists of two pieces. The cylindric 
preamplifier module with the 5-pole XLR connector (1 - CMPA)
is connected to the microphone capsule (2 - CM16) via a 2.5 mm 
thread. This allows to replace the capsule easily. For proper 
operation, both this 2.5 mm thread and the 17 mm thread on the 
preamplifier module must be fastened. However, use only moderate 
forces in order to prevent mechanical damages.

The integrated pre-amplifier has an internal compensation circuit 
that slightly boosts frequencies above 50 kHz.

Condenser Microphone CM16/CMPA

2

1

Condenser Microphone Capsule CM16

The microphone capsule consists of a thin metalized polyester film 
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the 
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way. 
Therefore, it is possible to remove or replace the grid by releasing 
the nuts on the front side (use the supplied 5.5 mm box spanner).

Due to its thin metalization, the diaphragm may deteriorate 
especially under humid conditions. Therefore, it is recommended to 
store the microphone in a dry place. Spare capsules are available 
on request and deteriorated diaphragms will be replaced by Avisoft 
Bioacoustics at a small fee. With some skill, it would also be 
possible to replace the membrane foil on your own (by releasing the 
screws on the back of the capsule).

The condenser microphone consists of two pieces. The cylindric 
preamplifier module with the 5-pole XLR connector (1 - CMPA)
is connected to the microphone capsule (2 - CM16) via a 2.5 mm 
thread. This allows to replace the capsule easily. For proper 
operation, both this 2.5 mm thread and the 17 mm thread on the 
preamplifier module must be fastened. However, use only moderate 
forces in order to prevent mechanical damages.

The integrated pre-amplifier has an internal compensation circuit 
that slightly boosts frequencies above 50 kHz.

Condenser Microphone CM16/CMPA

Condenser Microphone Capsule CM16

The microphone capsule consists of a thin metalized polyester film 
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the 
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way. 
Therefore, it is possible to remove or replace the grid by releasing 
the nuts on the front side (use the supplied 5.5 mm box spanner).

Due to its thin metalization, the diaphragm may deteriorate 
especially under humid conditions. Therefore, it is recommended to 
store the microphone in a dry place. Spare capsules are available 
on request and deteriorated diaphragms will be replaced by Avisoft 
Bioacoustics at a small fee. With some skill, it would also be 
possible to replace the membrane foil on your own (by releasing the 
screws on the back of the capsule).

The condenser microphone consists of two pieces. The cylindric 
preamplifier module with the 5-pole XLR connector (1 - CMPA)
is connected to the microphone capsule (2 - CM16) via a 2.5 mm 
thread. This allows to replace the capsule easily. For proper 
operation, both this 2.5 mm thread and the 17 mm thread on the 
preamplifier module must be fastened. However, use only moderate 
forces in order to prevent mechanical damages.

The integrated pre-amplifier has an internal compensation circuit 
that slightly boosts frequencies above 50 kHz.

Condenser Microphone CM16/CMPA

2

1

2

1

Condenser Microphone Capsule CM16

Hold the preamplifier module (1) on its ribbed campling nut and turn the 
CM16 capsule anticlockwise to remove it from the preamplifier  module. The 
protective grid can be removed by releasing the six M3 nuts. The new CM16 
capsule can then be mounted in reverse order. To prevent electrostatic 
dischareges that could potenmtially damage the preamplifier, one should first 
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal 
housing of the preamolifier module before mounting it.

Repacing the CM16 microphone capsule

Repacing the CM16 microphone capsule

Hold the preamplifier module (1) on its ribbed campling nut and turn the 
CM16 capsule anticlockwise to remove it from the preamplifier  module. The 
protective grid can be removed by releasing the six M3 nuts. The new CM16 
capsule can then be mounted in reverse order. To prevent electrostatic 
dischareges that could potenmtially damage the preamplifier, one should first 
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal 
housing of the preamolifier module before mounting it.

Hold the preamplifier module (1) on its ribbed campling nut and turn the 
CM16 capsule anticlockwise to remove it from the preamplifier  module. The 
protective grid can be removed by releasing the six M3 nuts. The new CM16 
capsule can then be mounted in reverse order. To prevent electrostatic 
dischareges that could potenmtially damage the preamplifier, one should first 
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal 
housing of the preamolifier module before mounting it.

Summary of Contents for CM16

Page 1: ...Condenser Microphone CM16 CMPA Condenser Microphone Capsule CM16 The microphone capsule consists of a thin metalized polyester film and a metal back plate Do not touch the diaphragm because its metalization could be destroyed It is recommended to use the capsule always with the protective grid However depending on the grid type the frequency response may be degraded in some way Therefore it is pos...

Page 2: ...he membrane foil on your own by releasing the screws on the back of the capsule The condenser microphone CMPA P48 CM16 consists of three components The microphone capsule CM16 1 is connected to the cylindric preamplifier module CMPA 2 by means of a 2 5 mm thread This allows to replace the capsule easily For proper operation both this 2 5 mm thread and the 17 mm thread on the preamplifier module mu...

Page 3: ... would also be possible to replace the membrane foil on your own by releasing the screws on the back of the capsule The condenser microphone CM16 CMPA 5V consists of three components The microphone capsule CM16 1 is connected to the cylindric preamplifier module CMPA 2 by means of a 2 5 mm thread This allows to replace the capsule easily For proper operation both this 2 5 mm thread and the 17 mm t...

Page 4: ...he cylindric preamplifier module CMPA 2 by means of a 2 5 mm thread This allows to replace the capsule easily For proper operation both this 2 5 mm thread and the 17 mm thread on the preamplifier module must be fastened However use only moderate forces in order to prevent mechanical damages The polarization voltage supply and preamplifier unit 3 provides the polarization voltage for the microphone...

Page 5: ...ible to replace the membrane foil on your own by releasing the screws on the back of the capsule The condenser microphone CM16 CMPA48AAF 5V consists of three components The microphone capsule CM16 1 is connected to the cylindric preamplifier module CMPA 2 by means of a 2 5 mm thread This allows to replace the capsule easily For proper operation both this 2 5 mm thread and the 17 mm thread on the p...

Page 6: ...The connection scheme of the XLR 4 connector is as follows pin 1 black GND pin 2 white OUT pin 3 green OUT GND pin 4 yellow 5VDC 10 power supply ...

Page 7: ...Polar Diagram Polar Diagram Polar Diagram ...

Page 8: ...microphone capsule and the heating module However the efficiency the thermal contact would be better without the grid Under some circumstances the USB cable connection between the heating module and the computer might cause electrical interferences that are caused by a ground loop In this case the ground connection to the heating module through the USB connector should be removed USB pin 4 This ca...

Page 9: ...will slightly affect the frequency response and the polar pattern of the microphone This effect can be minimized by adjusting the tube in such a way that there is only a short canopy about 10 mm in front of the microphone capsule The rain protection tube for the CM16 CMPA microphone can also be combined with the microphone heating Rain Protection Tube ...

Page 10: ...dle the foil on its edges only 4 Put the second mounting frame ring the one without threads onto the foil and align the mounting holes Make sure that there are no wrinkles on the foil 5 Fix the foil between the two rings by fastening the supplied screws 6 Place the acrylic disk 1 onto the non conductive marked side of the foil and add the aluminum disk 2 The lowering of that disk must be outside A...

Page 11: ...gh voltages may damage the sensitive input stage of the amplifier ESD In order to maintain the maximum possible sound quality low noise there is no full ESD protection circuit at the amplifier input Therefore the hydrophone and its cable should be discharged before connecting them to the charge amplifier This can be done by short circuiting the hydrophone connector Additionally the amplifier shoul...

Page 12: ...rostatically charged with high voltages several thousands volts These high voltages may damage the sensitive input stage of the amplifier ESD In order to maintain the maximum possible sound quality low noise there is no full ESD protection circuit at the amplifier input Therefore the hydrophone and its cable should be discharged before connecting them to the charge amplifier This can be done by sh...

Page 13: ...fiers are for instance G R A S 26AC B K 2670 or Microtech Gefell MV 302 Specifications Input connector female 7 pin LEMO 1B socket Frequency range 20 Hz 200 kHz Gain 30 dB Inherent noise 20Hz 20kHz 0 5 µV 125 dBu Optional high pass filter cut off frequency 15 kHz Preamplifier supply voltage LEMO pin 6 28 V Max preamplifier supply current available at pin 6 1 mA Polarization voltage LEMO pin 3 200 ...

Page 14: ... LIMITED TO IMPLIED WARRANTIES OF MERCHANTIBILITYAND FITNESS FOR A PARTICULAR PURPOSE 3 The Vendor s entire liability and the Buyer s exclusive remedy shall be at the Vendor s SOLE DISCRETION either 1 return of the device and refund of purchase price or 2 repair or replacement of the device 4 THE VENDOR WILL NOT BE LIABLE FOR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES HEREUNDER INCLUDING BUT NO...

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