Phonic GEQ 1502F, GEQ 3102F User Manual
GEQ 3102F
GEQ 1502F
GEQ 3102F
User's Manual
Manual del Usuario
ENGLISH ..................................................I
ESPAÑOL ..................................................II
V1.1 06/01/2012
Graphic EQualizErs
EcualizaDOr GrÁFicO
GEQ 1502F
GEQ 3102F
English Español
GEQ1502F / GEQ3102F
English
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iNTrODucTiON 1
FEaTurEs 1
iNiTial sETup 1
cONNEcTiONs aND cONTrOls 1
Front panel 1
rear panel 2
TYpical Graphic EQualizEr OpEraTiON 3
spEciFicaTiONs 4
APPENDIX
FrEQuENcY charT 1
applicaTiON 2
DiMENsiONs 3
BlOcK DiaGraM 4
CONTENTS
USER'S MANUAL
phonic preserves the right to improve or alter any information within this
document without prior notice
GEQ1502F / GEQ3102F
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1. read these instructions before operating this
apparatus.
2. Keep these instructions for future reference.
3. heed all warnings to ensure safe operation.
4. Follow all instructions provided in this document.
5. Do not use this apparatus near water or in locations
where condensation may occur.
6. clean only with dry cloth. Do not use aerosol or liquid
cleaners. unplug this apparatus before cleaning.
7. Do not block any of the ventilation openings. install
in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. a polarized plug has two blades
with one wider than the other. a grounding type plug
has two blades and a third grounding prong. The wide
blade or the third prong is provided for your safety. if
the provided plug does not into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. protect the power cord from being walked on or
pinched particularly at plug, convenience receptacles,
and the point where they exit from the apparatus.
11. Only use attachments/accessories by the
manufacturer.
12. use only with a cart, stand, tripod, bracket, or
table by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus
combination to avoid injury from tipover.
13. unplug this apparatus during lighting
storms or when unused for long
periods of time.
14. refer all servicing to service personnel.
servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
IMPORTANT SAFETY INSTRUCTIONS
cauTiON: TO rEDucE ThE risK OF ElEcTric shOcK,
DO NOT rEMOVE cOVEr (Or BacK)
NO usEr sErVicEaBlE parTs iNsiDE
rEFEr sErViciNG TO QualiFiED pErsONNEl
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product
’
magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.
WARNING: To reduce the risk of or electric shock, do
not expose this apparatus to rain or moisture.
CAUTION: use of controls or adjustments or performance
of procedures other than those may result in
hazardous radiation exposure.
The apparatus shall not be exposed to dripping or splashing and that no objects with liquids, such as vases,
shall be placed on the apparatus. The MaiNs plug is used as the disconnect device, the disconnect device shall
remain readily operable.
Warning: the user shall not place this apparatus in the area during the operation so that the mains switch
can be easily accessible.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
GEQ1502F / GEQ3102F
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GEQ 1502F GEQ 3102F
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INTRODUCTION
congratulations on your purchase of another quality
product, We hope the GEQ1502F or GEQ3102F graphic
equalizer proves itself to be a worth investment, and
provides you with years of dependable use for many
years to come. These equalizers were meticulously
designed by skilled engineers, and should give you total
control of your audio’s various frequencies. use the GEQ
equalizer in your speaker path, or use it with your mixer’
s insert points to integrate it better into your system.
We know how eager you are to get started, however we
advise that you take the time to read through this manual
before storing it in an easy to remember place for future
reference. Within this manual you’ll nd helpful information
on the operation and treatment of the GEQ unit.
FEATURES
● Ultra low-noise operation
● Professional 15-band stereo Graphic Equalizer for
live and studio application alike (GEQ1502F)
● Professional 31-band stereo Graphic Equalizer for
live and studio application alike (GEQ3102F)
● FB.D Feedback Detection circuitry instantly reveals
problem frequencies in your audio
● Low cut lter removes unwanted low-frequency
sounds
● High cut lter helps users better determine
frequencies they wish to work with (GEQ3102F)
● Dedicated subwoofer output with crossover control
● Accurate 4-digit output level meter (GEQ1502F)
● Accurate 6-digit output level meter (GEQ3102F)
● Gain control for adjusting input levels
● High quality workmanship and sturdy construction
● Balanced 1/4” TRS and XLR input and output
connectors
INITIAL SETUP
1. after opening and unpacking the GEQ equalizer,
inspect the unit for any noticeable damage. Though
attempts to take every precaution possible in
preventing damage occurring to its products in
transit, it is sometimes unavoidable. if the product is
noticeably damaged, users are advised to contact the
dealer at which they purchased the product.
2. if you wish to mount the GEQ into a 19” rack, ensure it
is not positioned above power ampliers and that the
unit has plenty of ventilation, as to avoid overheating.
3. plug any required devices into the GEQ’s inputs and
outputs. For example, a mixer’s output signal could
be sent to the inputs, and an amplier and speakers
connected to the outputs.
4. plug the provided power cord into the power connector
and into an appropriate ac power source. Be sure
to check local voltage levels before connecting the
unit. Do not under any circumstances defeat the
ground-pin of the cord, as it is provided for your own
protection.
CONNECTIONS AND CONTROLS
Front Panel
1.Output Level Meter
This 6-segment lED level meter (4-segment on the
GEQ1502F) will give you an accurate indication of when
the output level of the GEQ equalizer reaches certain
levels. if the red “clip” lED illuminates, users are advised
to reduce the level of that particular channel, either
through use of the input level control or by lowering the
frequency slide controls.
2. FB.D Switch
The FB.D Feedback Detection system is activated when
this button is pushed. When feedback is detected, an
lED will illuminate on the affected frequency’s slide
control. users can lower the level of that frequency to
eliminate the feedback.
3. Audio In/Out Switch
pushing this button will enable and disable the equalizer
function for the respecting input channel. When the
equalizer is disabled, the input signal will be sent directly
to the output channel without being altered.
4. Range Switch
This switch is used to change the boost/cut range of
the frequency slide controls between ±12 dB and ±6 dB
(switch depressed).
5. Input Control
This control is used to adjust the input level for the
corresponding channel. it gives you a boost/cut range
between -15 and +15 dB.
6. Low Cut Switch/Control
The low-cut button on the GEQ1502F will remove
frequencies below 25 hz to help eliminate unwanted
stage rumble and other unpleasant low-frequency
sounds.
The GEQ3102F features a low-cut control that will allow
users to select the cut-off frequency of the low-cut lter
between 10 and 400 hz. please note that this affects the
signal sent through the subwoofer output, as well.
GEQ1502F / GEQ3102F
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GEQ 1502F
GEQ 3102F
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GEQ 3102F
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GEQ 1502F
GEQ 3102F
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7. High Cut Control (GEQ3102F only)
The high-cut control allows users to select the cut-off
frequency of the high-cut lter between 2.5 kHz and 30
khz. all frequencies above your selected frequency will
be cut, helping you to better define which frequencies
you wish to be processed by a power amp (if one is
connected to your outputs). setting the frequency to 30
khz will allow the signal to pass through unaltered by the
high-cut lter.
8. Frequency Slide Controls
These 31 small faders (15 on the GEQ1502F) allow
users to adjust each frequency band of the audio
individually. at the “0” position, the frequency will not
be processed. slide a control up to boost that particular
frequency; down to attenuate it.
Rear Panel
9. Power Switch
Flicking this switch will turn the GEQ equalizer on and
off. remember to keep the power switch in the “off”
position when connecting or disconnecting the power
cord to the unit. The GEQ1502F’s power switch is
located at the front of the unit.
10. Power Connector
used for the addition of a power cable and supply,
allowing power to be supplied to the mixer. please use
the power cable that is included with this device only.
The Fuse holder, located above the ac power connector,
is for the GEQ’s fuse. if the fuse happens to blow, open
the holder cover, and replace the fuse with a suitable
replacement (as indicated next to the power connector).
11. Input Connectors
These balanced 1/4” TRS and XLR jacks are used for
receiving signals to be sent to each input channel.
12. Output connectors
These output connectors, the same as featured on the
input, send their corresponding signals. all outputs run
in parallel to one another (meaning you can use the 1/4”
and XLR outputs at the same time).
13. Subwoofer Output
The balanced subwoofer output connector can sends
the summed signal of the main left and right signals to
a subwoofer. The signal sent from the subwoofer output
has been processed by the internal crossover.
14. X-Over Frequency Control
This switch allows users to adjust the cross-over
frequency of the subwoofer output. This function ensures
that your subwoofer amplier needs only process the low
frequency audio that you want sent to the subwoofer.
GEQ1502F / GEQ3102F
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TYPICAL GRAPHIC EQUALIZER OPERATION
GENERAL TONE CONTROL
The graphic equalizer is a useful device for general
tone shaping because it is simple and easy to adjust.
The visual reference provided by the slide fader position
gives an approximate idea of the frequency response
generated: higher frequencies appear on the right, lower
frequencies on the left. To use the equalizer, you must
know the numerical frequency range of the tone you
wish to produce. The frequency range chart, located
on page 18, is a useful tool when first using a graphic
equalizer. use the range chart as a guide, then adjust by
ear. unfortunately, even a good equalizer cannot offer
a complete solution when a room has severe inherent
acoustic problems. Nor can equalization overcome the
lack of sound clarity caused by rooms with unduly long
reverberation times.
FEEDBACK CONTROL
in live performance applications, graphic equalization is
almost always applied separately to the stage monitor or
foldback system to reduce the level of those frequencies
that would otherwise cause feedback problems. These
problems arise from monitor positioning, sound reected
from the stage walls, and peaks in the frequency
response curves of the monitor speaker system.
a graphic equalizer can provide some control over
moderate feedback problems, but it hasn’t enough
flexibility or resolution to remedy a severe feedback
response. The best results are achieved by eliminating
feedback points. One or two feedback points can be
eliminated by adjusting the slide faders, but no more
than 6dB should be cut.
if you find feedback points covering many equalizer
bands and cutting every affected band does not help,
you must reduce the system gain. The combined use
of a graphic equalizer for tone control and a parametric
equalizer for feedback control is highly recommended.
MIXER CHANNEL EQUALIZATION
Many mixers provide only simple equalization for
individual channels. if your mixer has channel inserts,
you can patch your equalizer into a channel that is being
used for something important and use it to tailor the
sound of this channel exactly as you want.
LARGE ROOM EQUALIZATION
Large rooms tend to suffer from multiple reections with
long time delays and long reverberation intervals factors
which lead to reduced intelligibility and a generally
muddy sound. as sound travels long distances, high
frequencies attenuate more than low frequencies. in
general, a large room benets from some low frequency
roll-off and some high frequency boost. Therefore,
reducing the low frequency output may be advantageous
in buildings made of concrete or stone, where much of
the bass is reected rather than absorbed. Rolling off the
high frequency end above 5khz may also contribute to
a more natural sound. The shape of the optimal house
curve varies according to the individual sound system
and acoustic environment; a degree of experience is
indispensable to achieving the best result.
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