2 mains connection, 3 audio connections – Behringer GEQ3102 User Manual
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ULTRA-GRAPH PRO GEQ3102
Be sure that there is enough space around the unit for cooling and please do not place the ULTRA-GRAPH PRO
on high temperature devices such as power amplifiers etc. to avoid overheating.
4.2 Mains connection
Please ensure that the ULTRA-GRAPH PRO is set to the correct supply voltage before connecting the
unit to the AC power system! Three triangular markings can be found on the fuse holder at the AC power
connection socket. Two of these three triangles will be aligned with one another. The ULTRA-GRAPH PRO is
set to the operating voltage shown next to these markings and can be switched over by twisting the fuse holder
by 180°. IMPORTANT: This does not apply to export models designed only for 115 V AC!
The mains connection of the ULTRA-GRAPH PRO is made by using the enclosed mains cable and a standard
IEC receptacle. It meets all of the international safety certification requirements.
+
Please make sure that all units have a proper ground connection. For your own safety, never
remove or disable the ground conductor of the unit or of the AC power cable.
4.3 Audio connections
As standard, the BEHRINGER ULTRA-GRAPH PRO is installed with electronically servo-balanced inputs and
outputs. The circuit design features automatic hum rejection for balanced signals, permitting trouble-free
operation even at the highest operating levels. Externally induced power-line hum, etc. is thus suppressed
effectively. 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 (6 dB correction).
+
Please ensure that only qualified persons install and operate the ULTRA-GRAPH PRO. During
installation and operation the user must have sufficient electrical contact to earth. Electrostatic
charges might affect the operation of the ULTRA-GRAPH PRO!
1
2
3
2
1
3
Pin 1
Cable
Input
Output
Pin 2 = (+) Signal
Positive
Pin 3 = (-) Signal
Shield
(+) Signal + Hum
(-) Signal + Hum
Negative
(+)Hum + Signal
(-)Hum + Signal
2 x Signal
Ground
RFI and Hum
= Signal + 6 dB
Fig. 4.1: Compensation of interference with balanced connections
4. INSTALLATION