Behringer Speaker GEQ3102 User Manual

User’s Manual  
Version 1.1 July 2000  
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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-GRAPH PRO 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 we’ve 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 you’ve 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: it’s you, our customers! Many satisfied customers, mean large sales  
volumes enabling us to get better conditions of purchase for components, etc. Isn’t 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, it’s been worth the trouble!  
Thank you very much,  
Uli Behringer  
3
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ULTRA-GRAPH PRO GEQ3102  
ULTRA-GRAPH PRO  
Ultra-musical 31-Band Stereo Graphic Equalizer  
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  
4
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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  
5
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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.  
+
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.  
+
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.  
+
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.  
+
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).  
6
1. INTRODUCTION  
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ULTRA-GRAPH PRO GEQ3102  
You will find additional information in chapter 4 “INSTALLATION”.  
1.3 Control elements  
Fig. 1.1: The front panel of the ULTRA-GRAPH PRO  
The front panel of the BEHRINGER ULTRA-GRAPH PRO features six controls, six switches and 2 x 31 slide  
controls. Additionally, the GEQ3102 is equipped with two 12-digit LED meters. As all control elements are the  
same on both channels, this chapter deals with one channel only.  
1.3.1 The front panel  
Fig. 1.2: The front panel control elements  
1
2
Use the I/O METER IN/OUT switch to toggle the meter between input and output level. When the switch  
is pressed, the ULTRA-GRAPH PRO displays the output level.  
The AUDIO IN/OUT switch enables/disables the entire Equalizer section in the audio path. As this is a  
relay-controlled hard-bypass circuit, the inputs/outputs are directly connected as soon as the switch is  
released or the unit is switched off. Use the AUDIO IN/OUT switch to make A/B comparisons between  
direct and processed signals.  
3
The LEVEL METER monitors the signal level to warn you of distortion. Depending on the setting of the  
I/O METER IN/OUT switch, this meter reads the input or output level (switch pressed). The red CLIP  
LED lights up at about +18 dB, i.e. 3 dB below clipping.  
+
Please note that extreme frequency boost in combination with high input levels can lead to  
distortion. In this case, it will be necessary to reduce the input level with the INPUT control.  
4
5
The INPUT control adjusts the input level within a range from -15 to +15 dB.  
The LOW CUT control determines the lower cutoff frequency of the ULTRA-GRAPH PRO. The high  
pass filter (18 dB/oct.) can be set from 10 through 400 Hz, in position “10 Hz” the signal passes  
unaffected.  
6
The HIGH CUT control adjusts the upper cutoff frequency of the ULTRA-GRAPH PRO. The low pass  
filter (18 dB/oct.) can be set from 2.5 through 30 kHz, in position “30 kHz” the signal passes unaffected.  
1. INTRODUCTION  
7
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ULTRA-GRAPH PRO GEQ3102  
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Use the high and low cut filters as highly efficient tools to limit the frequency range to be  
processed.  
7
8
The RANGE switch allows you to switch over between maximum boost/cut in each frequency band,  
from 12 dB to 6 dB (switch pressed).  
These are the 31 SLIDE CONTROLS for each frequency band. If set to flat (“0”), there is no frequency  
response processing. To boost/cut a specific frequency move the corresponding slide control upwards  
or downwards respectively.  
1.3.2 The rear panel  
Fig. 1.3: The rear panel connectors  
9
Use the POWER switch to turn on the ULTRA-GRAPH PRO.  
10  
FUSE HOLDER / VOLTAGE SELECTOR. Please make sure that your local voltage matches the voltage  
indicated on the unit, before you attempt to connect and operate the ULTRA-GRAPH PRO. Blown fuses  
may only be replaced by fuses of the same type and rating. Some models allow for inserting the fuse  
holder in two different positions, in order to switch over from 230 V to 115 V operation, and vice versa.  
Please note that for 115 V operation outside Europe, you need to use a fuse of a higher rating (see  
chapter 4 “INSTALLATION”).  
11  
12  
Use the enclosed power cord to connect the unit to the mains.  
SERIAL NUMBER. Please take the time to have the warranty card filled out completely by your specialized  
dealer, and return it within 14 days after the date of purchase, so as to be entitled to benefit from our  
13  
14  
15  
16  
AUDIO IN - CHANNEL 2. These are the ULTRA-GRAPH PRO’s balanced 1/4" jack and XLR audio  
inputs.  
AUDIO OUT - CHANNEL 2. These are the audio outputs of the ULTRA-GRAPH PRO. The jack and  
XLR plugs of each channel are wired in parallel.  
AUDIO IN - CHANNEL 1. These are the ULTRA-GRAPH PRO’s balanced 1/4" jack and XLR audio  
inputs.  
AUDIO OUT - CHANNEL 1. These are the audio outputs of the ULTRA-GRAPH PRO. The jack and  
XLR plugs of each channel are wired in parallel.  
2. APPLICATIONS  
The flexible concept behind the BEHRINGER ULTRA-GRAPH PRO, with its great variety of audio processing  
features, opens up a whole new world of applications. We’d like to present you with a few examples in the  
following plus some typical settings.  
8
2. APPLICATIONS  
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ULTRA-GRAPH PRO GEQ3102  
2.1 Master equalizer in sound reinforcement systems  
This is the ULTRA-GRAPH PRO’s probably most common field of application.  
Fig. 2.1: The ULTRA-GRAPH PRO as a master equalizer  
Please note the following points to achieve optimum results:  
Practice has shown that it will be useful to listen to some “unprocessed” music and speech material before you  
start equalizing your sound reinforcement system. If any distortion can be heard, try to eliminate it within the  
system. Speaker placement is also of importance. No equalizer can improve a system sound that lacks  
transparency due to reflections from walls and ceiling. Often, drastic improvements can be achieved by  
modifying speaker placement and alignment.  
If you are using an active multi-way system you should take some run-time and phase correction measures  
before you work with the ULTRA-GRAPH PRO (the crossover network BEHRINGER SUPER-X PRO CX3400  
provides all the necessary tools with its variable split frequencies, phase reverse switches and electronic run-  
time correction facility). Interference such as mains hum and narrow-band resonance should be eliminated with  
the ULTRA-GRAPH PRO, before you start doing a sound check.  
Once this basic setting has been made, you can continue to fine-tune the system by hand.  
Please remember:  
A linear response curve is not desirable for all kinds of application. For example, intelligibility is more important  
in speech applications: here, you should apply a slight roll-off in the bass range, because below the frequency  
range of voices there are no wanted frequencies but only interference (rumble, etc.).  
In general, extremely low and high frequencies are transmitted with much lower amplitudes. There is no sense  
in “forcing” a small full-range speaker to reproduce frequencies below 50 Hz; apart from a need for higher  
power reserves, speaker damage will be the most likely result.  
+
You should always take the physical limits of your system into account, no matter which  
settings you choose.  
Once the system has been adjusted as precisely as possible to produce the desired response curve, you  
should walk around the room to get an impression of the sound produced in various places. Remember to  
make regular breaks during these listening tests and to play back various music and speech programs, so  
that you get a feel for the response characteristics of your system and of the room.  
2. APPLICATIONS  
9
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ULTRA-GRAPH PRO GEQ3102  
+
Good equalizer settings require time and patience! If you need to use extreme EQ settings to  
achieve an acceptable frequency response, the reason might be some serious misalignment of  
sound reinforcement system or room acoustics.  
Equalizers cannot make up for poor audio systems, but they are extremely useful and efficient tools for making  
musical fine-adjustments, as this often produces astounding improvements in terms of acoustic power and  
overall sound quality.  
2.2 Equalizer in the monitor path  
To use the ULTRA-GRAPH PRO in the monitor path, you should basically follow the same procedure as  
described in section 2.1.  
On stage, you should keep volume levels as low as possible, because:  
1. this will protect your ears,  
2. avoid feedback problems, and  
3. make it easier to create a well-balanced FOH sound.  
Often, the volume of the monitors is raised during concerts. Use concert pauses to reduce the levels of all  
monitor paths by about 3 dB. The musicians on stage will hardly notice this reduction (or even not at all),  
because their hearing, too, can relax a bit during the break. This method will give you valuable headroom.  
Extremely low frequencies are usually faded out completely, to avoid a stage sound that lacks transparency  
due to low frequency feedback. Apply the low cut filter until extremely low-end feedback frequencies are  
eliminated and the overall transparency of the monitors is improved.  
Fig. 2.2: Several ULTRA-GRAPH PRO’s as part of a monitor system  
This illustration gives you an example of how to use several ULTRA-GRAPH PRO’s in an 8-way monitor  
system.  
2.2.1 “Tuning in” of a monitor system  
“Tuning in” describes the process of detecting and suppressing feedback frequencies. Once all microphones  
and monitor speaker (plus power amps) have been set up and adjusted, you should turn up all Aux Send  
controls in those channels of your console that you will need for the monitor mix. Then, turn up the master Aux  
Send control until the first feedback occurs. Turn the control down a bit and leave it where there is no  
feedback. Now turn up the single slide controls on your ULTRA-GRAPH PRO, one after the other. Whenever  
feedback occurs, set the slide control of the respective frequency range to maximum cut. When there is no  
feedback, leave the control in mid-travel position. Finally, you can turn up the master Aux Send control without  
running the risk of audible feedback.  
10  
2. APPLICATIONS  
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ULTRA-GRAPH PRO GEQ3102  
2.3 Using the ULTRA-GRAPH PRO in the studio  
In the studio you can use your ULTRA-GRAPH PRO in a variety of further applications. Your imagination is the  
only limit. Here are just a few examples:  
Equalizing monitoring speakers:  
You can graphically equalize your monitoring speakers. Additionally, narrow-band room resonance frequencies  
can be suppressed with the ULTRA-GRAPH PRO. An analyzer (for example, the one integrated in our digital  
Equalizer ULTRA-CURVE PRO DSP8024) helps you identify room resonance and produce a linear frequency  
response.  
General sound processing:  
Equalizers can be used to process both single-channel and master signals. To process a single signal, you  
should use the channel insert point on your console to connect the ULTRA-GRAPH PRO. To control several  
signals, use either a Subgroup or Main Mix insert point. In particular, mastering studios frequently work with  
Equalizers to refine the sound of a finished mix. Often, the mix lacks balance, i.e. some frequencies are too  
loud or cannot be heard at all. With a Graphic Equalizer you can align the differing amplitudes of frequency  
ranges to create a homogenous sound image.  
Chapter 3 (“THE SOUND TOOL”) provides useful information on how to process typical frequency ranges of  
voices and instruments.  
3. THE SOUND TOOL  
In recording studios as well as stage or radio plays, the ULTRA-GRAPH PRO will be your valuable sound tool  
to modify the sound of voices (e.g. telephone voice) or to filter instruments so that they fit in an existing mix.  
The tables on the following pages give you an idea of specific frequencies and their acoustic significance,  
and suggest some possible uses of your ULTRA-GRAPH PRO.  
3.1 Effects of equalization on voice program  
Center frequency (Hz)  
Effect on voice  
1/3 octave  
40 to 125  
160 to 250  
315 to 500  
Sense of power in some outstanding bass singers.  
Voice fundamentals.  
Important for voice quality.  
Important for voice naturalness. Too much boost in the 315 to 1 kHz  
range produces a telephone-like quality.  
630 to 1k  
Voice fricatives-accentuation of vocals. Important for speech  
intelligibility. Too much boost between 2 and 4 kHz can mask certain  
speech sounds e.g. "m", "b", and "v" can become indistinguishable.  
Too much boost anywhere between 1 and 4 kHz can produce  
"listening fatigue". Vocals can be highlighted by slightly boosting the  
vocal at 3 kHz and at the same time slightly dipping the instruments  
at the same frequency.  
1.25k to 4k  
Accentuation of voice. The range from 1.25 to 8 kHz governs the  
clarity of voice.  
5k to 8k  
10k to 16k  
Too much boost causes sibilance.  
Tab. 3.1: Effects of equalization on voice reproduction  
3. THE SOUND TOOL  
11  
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3.2 Effects of equalization on music program  
Center frequency (Hz)  
1/3 octave  
Effects on music  
Fundamentals of bass drum, tuba, double bass and organ.  
These frequencies give music a sense of power. If over-  
emphasised they make the music "muddy". The 50 or  
60 Hz band is also used to reject AC mains hum.  
31 to 63  
Fundamentals of lower tympani. Too much boost produces  
excessive "boom". 100 or 125 Hz are also used for hum  
rejection.  
80 to 125  
Drum and lower bass. Too much boost produces  
excessive "boom". Also useful for 3rd harmonic mains hum  
rejection.  
160 to 250  
315 to 500  
630 to 1k  
Fundamentals of strings and percussion.  
Fundamentals and harmonics of strings, keyboards and  
percussion. Boosting the 600 to 1 kHz range can make  
instruments sound horn-like.  
Drums, guitar, accentuation of vocals, strings and bass.  
Too much boost in the 1 to 2 kHz range can make  
instuments sound tinny. Too much boost anywhere  
between 1 to 4 kHz can produce "listening fatigue".  
1.25k to 4k  
Accentuation of percussion, cymbals and snare drum.  
Reduction at 5 kHz makes overall sound more distant and  
transparent. Reduction of tape hiss and system noise. The  
1.25 to 8 kHz governs clarity and definition.  
5k to 8k  
Cymbals and overall brightness. Too much boost causes  
sibilance. Reduction of tape hiss and system noise.  
10k to 16k  
Tab. 3.2: Effects of equalization on music reproduction  
4. INSTALLATION  
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.  
+
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.  
4.1 Rack mounting  
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.  
12  
4. INSTALLATION  
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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!  
Output  
Cable  
Input  
Ground  
Positive  
Negative  
Pin 1  
2
1
1
2
Shield  
(+) Signal + Hum  
(-) Signal + Hum  
Pin 2 = (+) Signal  
Pin 3 = (-) Signal  
(+)Hum + Signal  
(-)Hum + Signal  
3
3
2 x Signal  
= Signal + 6 dB  
RFI and Hum  
Fig. 4.1: Compensation of interference with balanced connections  
4. INSTALLATION  
13  
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ULTRA-GRAPH PRO GEQ3102  
Unbalanced use of  
Balanced use of  
mono 1/4" jack plugs  
stereo 1/4" jack plugs  
Tip =  
Signal  
Tip =  
hot (+ve)  
Ring =  
cold (-ve)  
Sleeve =  
Ground / Shield  
Sleeve =  
Ground / Shield  
Tip  
Tip  
Ring  
Sleeve  
Sleeve  
Strain relief clamp  
Strain relief clamp  
For connection of balanced and  
unbalanced plugs, ring and sleeve have  
to be bridged at the stereo plug.  
Balanced use with XLR connectors  
2
1
1
2
1 = Ground / Shield  
2 = hot (+ve)  
3 = cold (-ve)  
3
3
Input  
Output  
For unbalanced use pin 1 and pin 3 have to be bridged  
Fig. 4.2: Different plug types  
14  
4. INSTALLATION  
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ULTRA-GRAPH PRO GEQ3102  
5. SPECIFICATIONS  
AUDIO INPUT  
Connectors  
Type  
XLR and 1/4" jack  
RF filtered, servo-balanced input  
50 kOhm balanced, 25 kOhm unbalanced  
+21 dBu balanced and unbalanced  
typ. 40 dB, > 53 dB @ 1 kHz  
Impedance  
Max. input level  
CMRR  
AUDIO OUTPUT  
Connectors  
Type  
XLR and 1/4" jack  
electronically servo-balanced output stage  
60 Ohms balanced, 30 Ohms unbalanced  
+21 dBu balanced and unbalanced  
Impedance  
Max. output level  
SYSTEM SPECIFICATIONS  
Frequency response  
10 Hz to 35 kHz, +/- 3 dB  
Noise  
THD  
Crosstalk  
> 92.3 dBu, unweighted, 22 Hz to 22 kHz  
0.004 % typ. @ +4 dBu, 1 kHz, Gain 1  
< -85 dB, 22 Hz to 22 kHz  
ROLL-OFF FILTER SECTION  
Type  
12 dB/oct., butterworth  
Input  
Low cut  
High cut  
variable (-15 dB to +15 dB)  
variable (10 Hz to 400 Hz)  
variable (2.5 kHz to 30 kHz)  
GRAPHIC EQUALIZER  
Type  
analog 1/3-octave equalizer  
Frequency range  
Bandwidth  
20 Hz to 20 kHz in 31 1/3-octave bands (ISO frequencies)  
1/3 octave  
Control range  
+/- 6 dB or +/- 12 dB (switchable)  
FUNCTION SWITCHES  
Audio in/out  
switch to bypass the equalizer functions  
I/O meter in/out  
Range  
switches the meter display from input to output  
shift of the maximum cut/boost range for all 31 bands  
INDICATORS  
Input/output level  
Function switch  
12-segment LED display: -30/-24/-18/-12/-6/-3/0/+3/+6/+9/+12/+18 dB  
LED indicator for every switch  
POWER SUPPLY  
Mains voltages  
USA/Canada  
120 V ~, 60 Hz  
U.K./Australia  
240 V ~, 50 Hz  
Europe  
230 V ~, 50 Hz  
General export model  
approx. 20 Watts  
100-120 V ~: T 400 mA H  
200-240 V ~: T 200 mA H  
standard IEC receptacle  
100-120 V ~, 200-240 V ~, 50-60 Hz  
Power consumption  
Fuse  
Mains connection  
PHYSICAL  
Dimension  
Weight  
approx. 3,5" (89 mm) * 19" (482.6 mm) * 5.3" (135 mm)  
approx. 2.5 kg  
BEHRINGER is constantly striving to maintain the highest professional standards. As a result of these efforts, modifications may be made from  
time to time to existing products without prior notice. Specifications and appearance may differ from those listed or illustrated.  
5. SPECIFICATIONS  
15  
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ULTRA-GRAPH PRO GEQ3102  
6. WARRANTY  
§ 1 WARRANTY CARD/ONLINE REGISTRATION  
To be protected by the extended warranty, the buyer must  
complete and return the enclosed warranty card within 14 days  
of the date of purchase to BEHRINGER Spezielle Studiotechnik  
GmbH, in accordance with the conditions stipulated in § 3. Failure  
to return the card in due time (date as per postmark) will void any  
extended warranty claims.  
3. Free inspections and maintenance/repair work are expressly  
excluded from this warranty, in particular, if caused by improper  
handling of the product by the user.  
This also applies to defects caused by normal wear and tear, in  
particular, of faders, potentiometers, keys/buttons and similar  
parts.  
Based on the conditions herein, the buyer may also choose to  
use the online registration option via the Internet  
4. Damages/defects caused by the following conditions are not  
covered by this warranty:  
s misuse, neglect or failure to operate the unit in compliance  
with the instructions given in BEHRINGER user or service  
manuals.  
§ 2 WARRANTY  
1. BEHRINGER (BEHRINGER Spezielle Studiotechnik GmbH  
including all BEHRINGER subsidiaries listed on the enclosed page,  
except BEHRINGER Japan) warrants the mechanical and  
electronic components of this product to be free of defects in  
material and workmanship for a period of one (1) year from the  
original date of purchase, in accordance with the warranty  
regulations described below. If the product shows any defects  
within the specified warranty period that are not due to normal  
wear and tear and/or improper handling by the user, BEHRINGER  
shall, at its sole discretion, either repair or replace the product.  
s connection or operation of the unit in any way that does not  
comply with the technical or safety regulations applicable in  
the country where the product is used.  
s damages/defects caused by force majeure or any other  
condition that is beyond the control of BEHRINGER.  
5. Any repair or opening of the unit carried out by unauthorized  
personnel (user included) will void the warranty.  
6. If an inspection of the product by BEHRINGER shows that the  
defect in question is not covered by the warranty, the inspection  
costs are payable by the customer.  
2. If the warranty claim proves to be justified, the product will be  
returned to the user freight prepaid.  
3. Warranty claims other than those indicated above are expressly  
excluded.  
7. Products which do not meet the terms of this warranty will be  
repaired exclusively at the buyer’s expense. BEHRINGER will  
inform the buyer of any such circumstance. If the buyer fails to  
submit a written repair order within 6 weeks after notification,  
BEHRINGER will return the unit C.O.D. with a separate invoice  
for freight and packing. Such costs will also be invoiced  
separately when the buyer has sent in a written repair order.  
§ 3 RETURN AUTHORIZATION NUMBER  
1. To obtain warranty service, the buyer (or his authorized dealer)  
must call BEHRINGER (see enclosed list) during normal business  
hours BEFORE returning the product. All inquiries must be  
accompanied by a description of the problem. BEHRINGER will  
then issue a return authorization number.  
§ 5 WARRANTY TRANSFERABILITY  
2. Subsequently, the product must be returned in its original  
shipping carton, together with the return authorization number to  
the address indicated by BEHRINGER.  
This warranty is extended exclusively to the original buyer  
(customer of retail dealer) and is not transferable to anyone  
who may subsequently purchase this product. No other person  
(retail dealer, etc.) shall be entitled to give any warranty promise  
on behalf of BEHRINGER.  
3. Shipments without freight prepaid will not be accepted.  
§ 4 WARRANTY REGULATIONS  
§ 6 CLAIM FOR DAMAGES  
1. Warranty services will be furnished only if the product is  
accompanied by a copy of the original retail dealer’s invoice.  
Any product deemed eligible for repair or replacement by  
BEHRINGER under the terms of this warranty will be repaired or  
replaced within 30 days of receipt of the product at BEHRINGER.  
Failure of BEHRINGER to provide proper warranty service shall  
not entitle the buyer to claim (consequential) damages. In no  
event shall the liability of BEHRINGER exceed the invoiced value  
of the product.  
§ 7 OTHER WARRANTY RIGHTS AND NATIONAL LAW  
2. If the product needs to be modified or adapted in order to  
comply with applicable technical or safety standards on a national  
or local level, in any country which is not the country for which  
the product was originally developed and manufactured, this  
modification/adaptation shall not be considered a defect in  
materials or workmanship. The warranty does not cover any  
such modification/adaptation, irrespective of whether it was  
carried out properly or not. Under the terms of this warranty,  
BEHRINGER shall not be held responsible for any cost resulting  
from such a modification/adaptation.  
1. This warranty does not exclude or limit the buyer’s statutory  
rights provided by national law, in particular, any such rights  
against the seller that arise from a legally effective purchase  
contract.  
2. The warranty regulations mentioned herein are applicable  
unless they constitute an infringement of national warranty law.  
The information contained in this manual is subject to change without notice. No part of this manual may be reproduced or  
transmitted in any form or by any means, electronic or mechanical, including photocopying and recording of any kind, for any  
purpose, without the express written permission of BEHRINGER Spezielle Studiotechnik GmbH.  
BEHRINGER, ULTRA-GRAPH, ULTRA-CURVE and SUPER-X are registered trademarks. ALL RIGHTS RESERVED.  
© 2000 BEHRINGER Spezielle Studiotechnik GmbH.  
BEHRINGER Spezielle Studiotechnik GmbH, Hanns-Martin-Schleyer-Str. 36-38, 47877 Willich-Münchheide II, Germany  
Tel. +49 (0) 21 54 / 92 06-0, Fax +49 (0) 21 54 / 92 06-30  
16  
6. WARRANTY  
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