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ULTRA-GRAPH PRO GEQ3102
1. INTRODUCTION
Thank you very much for expressing your confidence in BEHRINGER products by purchasing the
ULTRA-GRAPH PRO GEQ3102. With the ULTRA-GRAPH PRO you have acquired an extremely musical and
flexible 31-band Graphic Equalizer. This 2-channel high-end EQ is based on many years of experience and
know-how gathered in filter technology. Our analog and digital equalizers are used throughout the world in
renowned studios, sound reinforcement systems and broadcast/TV stations. The BEHRINGER
ULTRA-GRAPH PRO was designed to meet the most stringent requirements in terms of operation, sound,
specifications and workmanship.
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This manual first describes the terminology used, so that you can fully understand the
ULTRA-GRAPH PRO and its functions. Please read the manual carefully and keep it for future
reference.
1.1 The design concept
The philosophy behind BEHRINGER products guarantees a no-compromise circuit design and employs the
best choice of components. The operational amplifiers which are used in the ULTRA-GRAPH PRO, are
exceptional. They boast extreme linearity and very low distortion characteristics. To complement this design
the choice of components includes high tolerance resistors and capacitors, detent potentiometers and several
other stringently selected elements.
The ULTRA-GRAPH PRO uses SMD technology (Surface Mounted Device). These subminiature components
adapted from aerospace technology allow for an extreme packing density to further improve the overall
reliability. Additionally, the unit is manufactured in compliance with the ISO9000 certified management system.
Fail-safe relays have been incorporated into the design of the BEHRINGER ULTRA-GRAPH PRO. These
automatically and silently bypass the unit in the event of power supply disconnection or failure. These relays
are also active at power-on to isolate the unit from potentially damaging power-on thump.
1.2 Before you begin
Your BEHRINGER ULTRA-GRAPH PRO was carefully packed in the factory and the packaging is designed
to protect the unit from rough handling. Nevertheless, we recommend that you carefully examine the packaging
and its contents for any signs of physical damage, which may have occurred during transit.
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If the unit is damaged, please do not return it to BEHRINGER, but notify your dealer and the
shipping company immediately, otherwise claims for damage or replacement may not be granted.
Shipping claims must be made by the consignee.
The BEHRINGER ULTRA-GRAPH PRO fits into two standard 19" rack units of space. Please allow at least an
additional 4" depth for the connectors on the back panel.
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.
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Before you connect your ULTRA-GRAPH PRO to the mains, please make sure that your local
voltage matches the voltage required by the unit!
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.
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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.
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).
1. INTRODUCTION
