Operating Elements And Connections - IMG STAGELINE MPA-202 Manual De Instrucciones

Microphone Preamplifier
These instructions are intended for users without any
specific technical knowledge. Please read these instruc-
tions carefully prior to operating the unit and keep them
for later reference. All operating elements and connec-
tions de scribed can be found on the fold-out page 3.
In the following text, channel 1 is described. The opera-
tion 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
inverted
4 Peak value indicator PK: lights up when
the channel is perfectly adjusted
The LED must shortly light up with music
peaks. 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 indicator 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 unbal-
anced output must be connected; other-
wise, they may be damaged.
10 Microphone input (XLR, servo-balanced)
11 Line output (RCA, unbalanced)
12 Line output (XLR, servo-balanced)
2 Important Safety Notes
The units (microphone preamplifier and
plug-in transformer) correspond to all rele-
vant directives of the EU and are therefore
marked with
6
.
WARNING The plug-in transformer uses dan-
gerous mains voltage. Leave ser-
vicing to skilled personnel only.
Inexpert handling may result in
electric shock.
•
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).
•
Even when the amplifier is switched off, the
plug-in transformer connected to a mains
socket has a low current consumption.
•
Do not set the amplifier into operation and
immediately disconnect the plug-in trans-
former 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.
•
For cleaning only use a dry, soft cloth; never
use chemicals or water.
•
No guarantee claims for the amplifier or
the plug-in transformer and no liability for
any resulting personal damage or material
damage will be accepted if they are used for
other purposes than originally intended, if
they are not correctly connected or oper-
ated, or if they are not re paired in an ex-
pert way.
If the units are to be put out of oper-
ation 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 technol-
ogy to be used on stage and in the sound re-
cording studio as well as for home recording
and multimedia applications.
The microphone inputs are designed as
servo-balanced XLR jacks. For phantom-
powered microphones, the 12 V phantom
power can be switched on. Servo-balanced
XLR jacks and unbalanced RCA jacks are avail-
able as outputs. A 15 Hz infrasound filter and
an adjustable high pass filter (15 Hz to 240 Hz)
suppress interfering frequency parts.