Operating Elements And Connections; Applications - IMG STAGELINE MPA-202 Mode D'emploi

GB Please unfold page 3. Then you can always
see the operating elements and connections
described.
In the following text channel 1 is described. The
operation of channel 2 is completely identical.
1 Operating Elements
and Connections
1 Control LOW CUT for the high pass:
The signal parts below the adjusted fre-
quency are suppressed
2 Control FINE TUNE for the fine adjustment
of the amplification (±5 dB)
3 Button to invert the microphone signal;
with the button pressed, the signal will be in-
verted
4 Peak value indication PK:
lights up if the channel is driven in an opti-
mum way
The LED must shortly light up with music
pieces of highest volume. If it lights up for a
longer time, turn back the control FINE
TUNE (2) or the switch GAIN (5).
5 Step switch GAIN for coarse adjustment of
the amplification (20 – 70 dB in 5 dB steps)
6 Power indication ON
7 Connection jack "15 V~" for the supplied
plug-in transformer for the power supply
8 POWER switch
9 Button PHANTOM for switching on the
phantom power (+12 V)
Attention!
With the button pressed, the 12 V phantom
power is switched on. In this case no
microphones with unbalanced output must
be connected as these microphones may
be damaged.
10 Microphone input (XLR, servobalanced)
11 Line output (phono, unbalanced)
12 Line output (XLR, servobalanced)
2 Important Notes on the Safety
The units (microphone preamplifier and plug-in
transformer) correspond to all relevant directives
of the EU and are therefore marked with
6
WARNING The plug-in transformer is sup-
It is essential to observe the following items:
G
The units are suitable for indoor use only. Pro-
tect them against dripping water and splash
water, high air humidity, and heat (admissible
ambient temperature range 0 – 40 °C).
G
Even if the amplifier is switched off, the plug-
in transformer connected to a mains socket
has a low current consumption.
G
Do not set the amplifier into operation, or im-
mediately disconnect the plug-in transformer
from the mains socket if
1. there is visible damage to the plug-in
transformer or the amplifier,
2. a defect might have occurred after a drop
or similar accident,
3. malfunctions occur.
The units must in any case be repaired by
skilled personnel.
G
For cleaning only use a dry, soft cloth, never
use chemicals or water.
G
No guarantee claims for the amplifier or the
plug-in transformer and no liability for any re-
sulting personal damage or material damage
will be accepted if they are used for other pur-
poses than originally intended, if they are not
correctly connected, operated, or not re-
paired in an expert way.
If the units are to be put out of opera-
tion definitively, take them to a local
recycling plant for a disposal which is
not harmful to the environment.

3 Applications

The MPA-202 is a 2-channel microphone pre-
amplifier in low noise semiconductor technique
to be used on stage and in the sound recording
studio as well as for home recording and multi-
media applications.
The microphone inputs are designed as ser-
vobalanced XLR jacks. For phantom-powered
microphones the 12 V phantom power can be
switched on. XLR jacks of servobalanced de-
sign and phono jacks (unbalanced) are provid -
ed as outputs. A 15 Hz infrasound filter and an
adjustable high pass filter (15 Hz up to 240 Hz)
. suppress interfering frequency parts.
plied with hazardous mains volt-
age. Leave servicing to skilled
personnel only. Inexpert handling
or modification of the unit may
cause an electric shock hazard.