Behringer GEQ3102 User Manual
PRO GEQ3102
®
Users Manual
ENGLISH
Version 1.1 July 2000
ULTRA-GRAPH
www.behringer.com
ULTRA-GRAPH PRO GEQ3102
SAFETY INSTRUCTIONS
CAUTION: To reduce the risk of electric shock, do not remove
the cover (or back). No user serviceable parts inside;
refer servicing to qualified personnel.
WARNING: To reduce the risk of fire or electric shock, do not
expose this appliance to rain or moisture.
This symbol, wherever it appears, alerts
you to the presence of uninsulated
dangerous voltage inside the enclosure
- voltage that may be sufficient to
constitute a risk of shock.
DETAILED SAFETY INSTRUCTIONS:
All the safety and operation instructions should be read before the appliance is operated.
Retain Instructions:
The safety and operating instructions should be retained for future reference.
Heed Warnings:
All warnings on the appliance and in the operating instructions should be adhered to.
Follow instructions:
All operation and user instructions should be followed.
Water and Moisture:
The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a
wet basement, or near a swimming pool etc.).
Ventilation:
The appliance should be situated so that its location or position does not interfere with its proper ventilaton.
For example, the appliance should not be situated on a bed, sofa rug, or similar surface that may block the
ventilation openings: or placed in a built-in installation, such as a bookcase or cabinet that may impede the
flow of air through the ventilation openings.
Heat:
The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other
appliances (including amplifiers) that produce heat.
Power Source:
The appliance should be connected to a power supply only of the type described in the operating instructions
or as marked on the appliance.
Grounding or Polarization:
Precautions should be taken so that the grounding or polarization means of an appliance is not defeated.
Power-Cord Protection:
Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed
upon or against them, paying particular attention to cords and plugs, convenience receptacles and the point
where they exit from the appliance.
Cleaning:
The appliance should be cleaned only as recommended by the manufacturer.
Non-use Periods:
The power cord of the appliance should be unplugged from the outlet when left unused for a long period of
time.
Object and Liquid Entry:
Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
Damage Requiring Service:
The appliance should be serviced by qualified service personnel when:
- The power supply cord or the plug has been damaged; or
- Objects have fallen, or liquid has been spilled into the appliance; or
- The appliance has been exposed to rain; or
- The appliance does not appear to operate normally or exhibits a marked change in performance; or
- The appliance has been dropped, or the enclosure damaged.
Servicing:
The user should not attempt to service the appliance beyond that which is described in the Operating Instructions.
All other servicing should be referred to qualified service personnel.
This symbol, wherever it appears, alerts
you to important operating and
maintenance instructions in the
accompanying literature. Read the
manual.
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ULTRA-GRAPH PRO GEQ3102
FOREWORD
Dear Customer,
Welcome to the team of ULTRA-GRAPH PRO users and thank you very much for expressing your confidence
in BEHRINGER products by purchasing the GEQ3102.
It is one of my most pleasant tasks to write this letter to you, because it is the culmination of many months of
hard work delivered by our engineering team to reach a very ambitious goal: making an outstanding device that
will become a standard tool used by studios and P.A. companies. The task to design the
ULTRA-GRAPHPRO certainly meant a great deal of responsibility, which we assumed by focusing on you,
the discerning user and musician. It also meant a lot of work and night shifts to accomplish this goal. But it was
fun, too. Developing a product usually brings a lot of people together, and what a great feeling it is when
everybody who participated in such a project can be proud of what weve achieved.
It is our philosophy to share our joy with you, because you are the most important member of the BEHRINGER
family. With your highly competent suggestions for new products youve greatly contributed to shaping our
company and making it successful. In return, we guarantee you uncompromising quality (manufactured under
ISO9000 certified management system) as well as excellent technical and audio properties at an extremely
favorable price. All of this will enable you to fully unfold your creativity without being hampered by budget
constraints.
We are often asked how we can make it possible to produce such high-grade devices at such unbelievably low
prices. The answer is quite simple: its you, our customers! Many satisfied customers, mean large sales
volumes enabling us to get better conditions of purchase for components, etc. Isnt it only fair to pass this
benefit back to you? Because we know that your success is our success too!
I would like to thank all people whose help on Project ULTRA-GRAPH PRO has made it all possible. Everybody
has made very personal contributions, starting from the designers of the unit via the many staff members in our
company to you, the user of BEHRINGER products.
My friends, its been worth the trouble!
Thank you very much,
Uli Behringer
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ULTRA-GRAPH PRO GEQ3102
ULTRA-GRAPH PRO
Ultra-musical 31-Band Stereo Graphic Equalizer
GEQ3102
s Delivers outstanding equalization both in live applications and in the studio
s For gentle contouring and audio sweetening in audio post-production and recording studios
s Perfectly suited for room equalization and extreme corrective surgery e.g. notching out unwanted frequencies
(feedback etc.)
s 2 x 31 ISO frequencies controllable via slide controls with boost/cut range switchable from 12 dB to 6 dB
s Additional sweepable High and Low Cut filters remove unwanted frequencies e.g. floor rumble and tape hiss
etc.
s Servo-balanced inputs and outputs on gold-plated XLR and 1/4" jack connectors
s Relay-controlled hard-bypass with an auto-bypass function during power failure (failsafe relay)
s Ultra-low noise audio operational amplifiers offer outstanding sound performance
s High-precision illuminated ALPS faders
s Accurate 12-segment LED input/output metering for easy level setting
s High-quality detented potentiometers and illuminated switches
s High-grade toroidal transformer for a minimum of interference
s High-quality components and exceptionally rugged construction ensures long life
s Manufactured under ISO9000 certified management system
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ULTRA-GRAPH PRO GEQ3102
TABLE OF CONTENT
1. INTRODUCTION ..................................................................................................................... 6
1.1 The design concept ......................................................................................................................... 6
1.2 Before you begin ............................................................................................................................. 6
1.3 Control elements ............................................................................................................................. 7
1.3.1 The front panel ...................................................................................................................... 7
1.3.2 The rear panel ....................................................................................................................... 8
2. APPLICATIONS ....................................................................................................................... 8
2.1 Master equalizer in sound reinforcement systems........................................................................... 9
2.2 Equalizer in the monitor path......................................................................................................... 10
2.2.1 Tuning in of a monitor system ........................................................................................... 10
2.3 Using the ULTRA-GRAPH PRO in the studio ................................................................................. 11
3. THE SOUND TOOL .............................................................................................................. 11
3.1 Effects of equalization on voice program ......................................................................................... 11
3.2 Effects of equalization on music program ...................................................................................... 12
4. INSTALLATION ..................................................................................................................... 12
4.1 Rack mounting .............................................................................................................................. 12
4.2 Mains connection .......................................................................................................................... 13
4.3 Audio connections ........................................................................................................................ 13
5. SPECIFICATIONS ................................................................................................................. 15
6. WARRANTY ........................................................................................................................... 16
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