18
+
Please make sure that all units have a proper ground connection. For your own safety, it is
advisable not to remove the ground connection within the units or at the supply, or fail to
make this connection at all.
The audio ground of the MAGICIAN is internally capacitor de-coupled, to isolate it from the supply earth. It is
therefore not advantageous to attempt ground loop problem solving using this method.
Before you switch on the unit, check that it is configured to match your AC mains voltage requirements. If it
does not comply, then it is necessary to switch the operating voltage to the correct supply requirements
BEFORE turning on the unit, otherwise the unit could be severely damaged. You will find this combined fuse
holder/voltage selector at the back, adjacent to the IEC receptacle.
IMPORTANT: This does not apply for
general export models which are built for one operating voltage only.
The AC voltage selection is defined by the position of the fuse holder. If you intend to change the operating
voltage, remove the fuse holder and twist it by 180 degrees before you reinsert it. Matching the two markers
monitors the selected voltage.
+
If the unit is switched to another operating voltage, the fuse rating must be changed. See the
technical specifications in the appendix
A safety fuse protects the unit from serious defects. If the fuse blows, this is a warning sign and always
indicates that the circuit is overloaded. The fault must always be repaired before the fuse is replaced. If the
safety fuse is faulty and needs replacing after the unit is repaired, please make sure that you replace it only
with the identical type and rating. NEVER use fuses of different ratings or cover faulty fuses with aluminium foil.
This can cause fire and electric shocks and will endanger your life and the lives of others.
5.3 Audio connections
As standard, the BEHRINGER MAGICIAN is installed with electronically servo-balanced inputs and outputs.
This circuit design features automatic hum and noise reduction for balanced signals and thus allows for trouble-
free operation, even at high operating levels. Externally induced mains hum etc. will be effectively suppressed.
The automatic servo-function recognizes the presence of unbalanced connectors and adjusts the nominal level
internally to avoid level differences between the input and output signals (correction 6 dB).
+
Please ensure that only qualified persons install and operate the MAGICIAN. During installa-
tion and operation the user must have sufficient electrical contact to earth. Electrostatic charges
might affect the operation of the MAGICIAN!
1
2
3
2
1
3
Pin 1
Cable
Input
Output
Pin 2 = (+) Signal
Positive
Pin 3 = (-) Signal
Shield
(+) Hum
(-) Hum
Negative
(+)Hum + Signal
(-)Hum + Signal
2 x Signal
Ground
RFI and Hum
= 6 dB
Fig. 5.1: Compensation of interference with balanced connections
5. INSTALLATION
All manuals and user guides at all-guides.com
