4 Operating Notes
4.1 Recommended Microphones
You can connect the transmitter to any low-imped-
ance dynamic microphone with a 3-pin standard
XLR connector.
The battery inside the transmitter only powers the
transmitter and provides no supply voltage for the
microphone. Therefore, you can use the transmitter
only with condenser microphones that have an
internal power supply. (The SO 40 is not suited for
use with con denser microphones that only operate
on external phantom power.)
4.2 Connecting and Disconnecting the
Transmitter (refer to fig. 3)
1. Plug the XLR connector on the transmitter (1)
into the XLR connector on your microphone (2).
2. To disconnect the transmitter (1), press the
unlocking button (3) on the transmitter and
remove the trans mitter (1) from the micro-
phone (2).
SO 40 snapon
Fig. 3: Connecting to and disconnecting the
transmitter from a microphone.
4.3 Setting Levels (refer to fig. 1)
1. Check that the receiver is marked with the
same color code as the transmitter.
2. Use a small screwdriver to turn the input gain
control (4) on the trans mitter to a position
halfway between the left and right stops.
3. Set the ON/MUTE/OFF switch (1) to ON to
switch power to the transmitter on.
4. Switch power to your sound system or amplifi-
er on.
5. Speak or sing into the microphone.
6. If your voice sounds distorted on the loud-
speakers turn the input gain control (4) down
CCW to the point that you will hear no more
distortion.
If your voice sounds too quiet on the loud-
speakers, turn the input gain control (4) up CW.
If the loudspeakers start howling due to
acoustic feed back, immediately turn the input
gain control (4) back down to the point that the
howling will stop.
4.4 Microphone Technique
For detailed hints on how to use a vocal micro-
phone, particularly with regard to working distance,
proximity effect, and feedback, refer to the instruc-
tion manual of your AKG microphone.
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