IMG STAGELINE MPA-102 Mode D'emploi page 8

not be operated via the batteries for a long-
GB
er period of time, the batteries should be
removed. The unit can thus not be dam-
aged should battery leakage occur.
2) Connect the microphone to the input (13). The
XLR socket has a lock which can be released
by pressing down the PUSH lever and at the
same time pulling out the plug.
3) Connect the following unit with line level
input (e. g. amplifier, mixer) to the output
(12).
With unbalanced connection, the con-
tacts 1 (ground) and 3 of the XLR inline jack
should be short-circuited. By the servo-
balanced circuit the 6 dB level loss will then
automatically be equalized which otherwise
occurs with unbalanced connection.
4) It is additionally possible to mix the amplified
microphone signal to a stereo line channel:
- If the microphone signal is going to be
mixed to the stereo line signal of a further
signal source, connect the source to the
input (11).
- If the output signal of the stereo line chan-
nel is going to be fed to a following unit
with line level input (e. g. recording unit),
connect the unit to the output (10).
5) For power supply via the AC/AC adaptor
connect it to a mains socket (230 V~/50 Hz).
5 Operation
1) Switch the unit on via the on/off switch (8).
The LED above the selector switch (1) lights
green to indicate operation.
2) Via the selector switch (1) the amplification of
the microphone signal can be adjusted in 11
steps from 20 dB to 70 dB. Adjust the selector
switch according to the desired amplification.
In case of overload the LED above the selec-
tor switch lights red.
3) When using a phantom-powered condenser
microphone, the phantom power supply
(+24 V) has to be switched on by tilting the
switch (3) upwards.
ATTENTION If the phantom power supply
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may be reproduced in any form or by any means for any commercial use.
8
is switched on, no unbalanced
microphone must be connect-
ed to the microphone input
(13) as the microphone might
be damaged.
® INTERNATIONAL GmbH & Co. KG. No part of this instruction manual
4) Tilt the switch (4) upwards for reversing the
phase of the microphone signal by 180°.
5) The microphone signal is mixed to the ster-
eo line channel via the mixing control (2).
Turn up the control according to the desired
signal level. The output signal of the stereo
line channel is available at the jacks (10).
6) The mono microphone signal is distributed to
the stereo line channel via the panpot (7).
The panpot setting determines the position of
the microphone signal within the stereo mix
image:
With the control in center position, the signal
acoustically appears in the center. The more
the control is turned to the left (L) the more
the signal is acoustically moved to the left; the
more the control is turned to the right (R), the
more the signal is moved to the right.
7) Tilt the switch (5) upwards for suppressing
high interference frequencies via the low-
pass filter.
8) Tilt the switch (6) upwards for suppressing
low interference frequencies via the high-
pass filter.
6 Specifications
Frequency range: . . . . . . 20 – 20 000 Hz
Gain
MIC INPUT: . . . . . . . . 20 – 70 dB, switchable
STEREO LINE: . . . . . 0 dB
Input sensitivity
for 1 V at the output: . . . . 0.16 – 100 mV, switchable
Input impedance
MIC INPUT: . . . . . . . . 2.2 kΩ
STEREO LINE: . . . . . 10 kΩ
Phantom power: . . . . . . . +24 V
Outputs
PREAMP OUT: . . . . . 1 V/12 V max., 100 Ω
STEREO LINE . . . . . . 1 V/ 6 V max., 100 Ω
High-pass filter: . . . . . . . 100 Hz /-3 dB, 12 dB/oct.
Low-pass filter: . . . . . . . . 12 kHz /-3 dB, 12 dB/oct.
S/N ratio
Mic: . . . . . . . . . . . . . . > 66 dB
Line: . . . . . . . . . . . . . . 80 dB
Power supply:. . . . . . . . . 15 V~ via supplied AC/AC
Subject to change.
adaptor (230 V~/50 Hz /10 VA)
or four 9 V transistor batteries