Operating Instructions
PHM910 Installation Microphone
Version 03/13
Item no. 31 29 77
These operating instructions are published by Conrad Electronic SE, Klaus-Conrad-Straße 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in technology and equipment reserved.
© Copyright 2013 by Conrad Electronic SE.
V3_0313_02-KV
1
2
40 cm
60º
3. For mounting the microphone on a table top, for example, drill a mounting hole with a diameter of 22 mm.
The maximum thickness of the table top is 60 mm.
4. Remove the lower rubber ring, the nut and the bearing ring (ill. 3) and place the microphone (including
rubber ring) into the mounting hole (ill. 4).
5. Put the rubber ring and bearing ring on the microphone thread and tighten the microphone with the nut
(ill. 5). Use a suitable spanner for this.
3
4
5
max. 60 mm
ø 22
Operation
The microphone gets the supply voltage necessary for operation via the connected audio device,
i.e., the microphone input on the audio device must have phantom powering (9 – 52 V/DC).
To avoid distortions or erroneous adaptations that can result in damage to the microphone or
the audio set connected take care to connect the product only to suitable microphone inputs.
To connect the microphone, only use a suitable shielded microphone cable. The use of other
cables might cause interference.
Make sure that the cables are not crushed or damaged by sharp edges.
1. Switch off the audio device to which your microphone is to be connected.
2. Connect the XLR plug (female) of the microphone line to the XLR plug on the microphone.
3. Connect the XLR plug (male) of the microphone line to your audio device.
4. Minimise the volume of your audio device.
5. Turn on the phantom power (9 – 52 V/DC) on your audio device.
6. Switch your audio device on.
7. Adjust the volume and, if required, the sensitivity of your audio device.
8. After use, turn the audio device off. Unplug the microphone from the audio device.
Cleaning
Regularly clean the product of dust. The product should only be cleaned externally with a soft dry cloth or
brush. Do not use abrasive or chemical cleaners.
Disposal
Electronic devices are recyclable waste and must not be disposed of in the household waste.
At the end of its service life, dispose of the product according to the relevant statutory regulations.
Technical data
Transformer type:
back electret condenser
Max. SPL:
130 dB
Directional characteristic: unidirectional (cardioid)
Signal-to-noise ratio: >65 dB
Frequency response*:
50 – 18000 Hz
Power consumption: <2.2 mA
Sensitivity:
-65 dB ± 3 dB
Connection:
3-pole XLR plug (male)
Impedance:
250 Ω
Dimensions (Ø x L): approx. 28 x 90 mm
Phantom power supply: 9 – 52 V/DC
Weight:
approx. 107 g (with nut
and bearing ring)
*Frequency response
dB
+ 20
- 20
20 Hz
50 Hz 100 Hz
500 Hz 1 kHz
10 kHz 20 kHz
+ 10
- 10
0
Intended use
The microphone serves for transforming acoustic signals (sound waves) into electric signals. It can be
mounted on conference tables or speakers’ lecterns, for example. The low-level audio output signal requires
to be connected to suitable microphone inputs of audio sets only. The microphone may only be supplied with
power via a device with phantom powering (9 – 52 V/DC). The product may be used only indoors, never
outdoors. Contact with moisture, for example in bathrooms, must be avoided.
For safety and approval purposes (CE), you must not rebuild and/or modify this product. If you use the
product for purposes other than those described above, the product may be damaged. In addition, improper
use can cause hazards such as short circuiting, fire, electric shock etc. Read the instructions carefully and
keep them. Make this product available to third parties only together with its operating instructions.
This product complies with the statutory national and European requirements. All company names and
product names are trademarks of their respective owners. All rights reserved.
Delivery content
• Microphone
• Operating instructions
Safety instructions
Read the operating instructions carefully and especially observe the safety information.
If you do not follow the safety instructions and information on proper handling in this
manual, we assume no liability for any resulting personal injury or damage to property.
Such cases will invalidate the warranty/guarantee.
a) Persons / Product
• Do not turn the microphone towards the loudspeakers. This results in acoustic feedback which
can damage both loudspeakers and microphone.
• The device is not a toy. Keep it out of the reach of children and pets.
• Do not leave packaging material lying around carelessly. These may become dangerous
playing material for children.
• Protect the product from extreme temperatures, direct sunlight, strong jolts, high humidity,
moisture, flammable gases, vapours and solvents.
• Do not place the product under any mechanical stress.
• If it is no longer possible to operate the product safely, take it out of operation and protect it
from any accidental use. Safe operation can no longer be guaranteed if the product:
- is visibly damaged,
- is no longer working properly,
- has been stored for extended periods in poor ambient conditions or
- has been subjected to any serious transport-related stresses.
• Please handle the product carefully. Jolts, impacts or a fall even from a low height can damage
the product.
• Also observe the safety and operating instructions of any other devices which are connected
to the product.
b) Miscellaneous
• Consult an expert when in doubt about operation, safety or connection of the device.
• Maintenance, modifications and repairs are to be performed exclusively by an expert or at a
qualified shop.
• If you have questions which remain unanswered by these operating instructions, contact our
technical support service or other technical personnel.
Product overview
ø 28
ø 23
ø 28
90
67
3.6
3.2
3-pole XLR
plug (male)
Bearing ring
Rubber ring
Microphone
Nut
9
6
14
ø 12
ø 32
M20 x P1.0
ø 34.6
Mount microphone
We recommend having the product installed by a specialist.
When selecting the location where your product is mounted, make sure that shocks, vibrations,
dust, heat, cold and moisture are prevented.
When installing be sure to choose a location that is decoupled as much as possible from any
solid-borne sound.
1. The microphone can be mounted on table tops and ceilings. Mounting on a table top will be described
in what follows.
2. The microphone is normally mounted approx. 40 cm from a seated person (ill. 1). If the microphone is
mounted on a speaker’s lectern, for example, it should be at an angle of about 60 degrees to the person
standing (ill. 2).
