Phonic A6600B User manual

A6600B
Graphic Equalizer

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 tip-
over.
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 in-
tended to alert the user to the presence of important operat-
ing 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

Graphic Equalizer
A6600B
INTRODUCTION .................................................................................................4
FEATURES ........................................................................................................4
INITIAL SETUP....................................................................................................5
CONNECTIONS AND CONTROLS..........................................................................5
FRONT PANEL .........................................................................................5
REAR PANEL ...........................................................................................6
TYPICALGRAPHICEQUALIZEROPERATION.................................................................7
FREQUENCY CHART............................................................................................8
APPLICATION ..................................................................................................9
SPECIFICATIONS ..............................................................................................10
DIMENSIONS .....................................................................................11
BLOCK DIAGRAM .................................................................................12
Phonic preserves the right to improve or alter any information within this document without prior notice.
V1.0 JAN 02,2007

4 A6600B
INTRODUCTION
Congratulations on your purchase of another quali-
ty product from Phonic! We hope the A6600B graphic
equalizer proves itself to be a worth investment, and pro
vides you with years of dependable use for many years to
come. These equalizers were meticulously designed by
Phonic’s skilled engineers, and should give you total con-
trol of your audio’s various frequencies. Use the A6600B
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 informa-
tion on the operation and treatment of the A6600B unit.
FEATURES
● Ultra low-noise operation
● Professional 31-band stereo Graphic Equalizer for
live and studio application alike
● 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 frequen-
cies they wish to work with
● Dedicated subwoofer output with crossover control
● Accurate 6-digit output level meter
● Gain control for adjusting input levels
● High quality workmanship and sturdy construction
● Balanced 1/4” TRS and XLR input and output
connectors

5
A6600B
INITIAL SETUP
1. After opening and unpacking the A6600B equal-
izer, inspect the unit for any noticeable damage.
Though Phonic attempts to take every precau-
tion possible in preventing damage occurring to its
products in transit, it is sometimes unavoidable. If
the product is noticeably damaged, users are ad-
vised to contact the dealer at which they purchased
the product.
2. If you wish to mount the A6600B into a 19” rack, en-
sure it is not positioned above power ampliers and
that the unit has plenty of ventilation, as to avoid
over-heating.
3. Plug any required devices into the A6600B’s inputs
and outputs. For example, a mixer’s output signal
could be sent to the inputs, and an amplier and
speakers connected to the outputs.
4. Plug the provided power cord into the power con-
nector and into an appropriate AC power source.
Be sure to check local voltage levels before con-
necting the unit. Do not under any circumstances
defeat the ground-pin of the cord, as it is provided
for your own protection.
1
2
4
5
3
67
CONNECTIONS AND CONTROLS
Front Panel
1.Output Level Meter
This 6-segment LED level meter will give you an accurate
indication of when the output level of the A6600B
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 A6600B 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.
7. High Cut Control
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 dene which frequen-
cies 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.

6 A6600B
8
Rear Panel
9. Power Switch
Flicking this switch will turn the A6600B
equalizer on and off. Remember to keep
the power switch in the “off” position when
connecting or disconnecting the power
cord to 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 mixer only. The Fuse
holder, located above the AC Power
connector, is for the A6600B’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 amplier needs only
process the low-frequency audio that you want sent
to the subwoofer.
8. Frequency Slide Controls
These 31 small faders 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.
11
13
12 12
14
9
10

7
A6600B
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 10, is
a useful tool when rst 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 moni-
tor or foldback system to reduce the level of those fre-
quencies that would otherwise cause feedback prob-
lems. These problems arise from monitor positioning,
sound reected from the stage walls, and peaks in the
frequency response curves of the monitor speaker
system. A graphic equalizer can provide some con-
trol over moderate feedback problems, but it hasn’t
enough  exibility 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 nd 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.
TYPICAL GRAPHIC EQUALIZER OPERATION
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.

8 A6600B
LARGE ROOM EQUALIZATION
Large rooms tend to suffer from multiple re ections 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 benets 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 reected 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 indispensible to achieving the
best result.

MIXER
AMPLIFIER
AMPLIFIER
SPEAKERS
SUBWOOFER
MIXER
9
A6600B
APPLICATION
IN THE PATH OF
AN AMP AND SPEAKERS
USING AN INSERT POINT

10 A6600B
SPECIFICATION
Audio Inputs
Inputs Balanced XLR and 1/4” TRS connectors
Impedance 40 kΩ balanced and unbalanced
Maximum Input Level +21 dBu balanced and unbalanced
CMRR typ. 40 dB, >55 dB @ 1 kHz
Audio Outputs
Outputs Balanced XLR and 1/4” TRS connectors
Subwoofer Out Balanced XLR connector
Crossover Frequency Variable, 30 - 200 Hz
System Specications
Frequency Response 10 Hz to 30 kHz, +/-3 dB
S/N Ratio 22 Hz to 22 kHz >94 dB @ +4 dBu
Distortion (THD) typ. 0.006% @ +4 dBu, 1 kHz, Gain 1
Crosstalk typ. -70 dB @ 1kHz
Roll-Off Filter Section
Type 12 dB/oct., Butterworth
Input Variable (-15 dB to +15 dB)
Low Cut Variable (10 Hz to 400 Hz)
High Cut Variable (2.5 kHz to 30 kHz)
Graphic Equalizer
Type Stereo 31-band equalizer
Frequency Range 20 Hz to 20 kHz in 31 1/3-octave bands (ISO frequencies)
Bandwidth 1/3 octave
Control Range +/-6 dB or +/-12 dB (switchable)
Function Switches
FBQ Activates the FBQ Feedback Detection System
Audio In/Out Switch to bypass the equalizer functions
I/O Meter In/Out switches the meter display from input to output
Range Shift of the maximum cut/boost range for all 31/15 bands
Indicators
Input/output Level 12-segment output display: -30/-24/-18/-12/-6/-3/0/+3/+6/+9/+12 dB/CLIP
Power Supply
Mains Voltage USA/Canada 120 V~, 60 Hz
Europe/U.K./Australia 230 V~, 50 Hz
Japan 100 V~, 50 - 60 Hz
General export model 120/230 V~, 50 - 60 Hz
Power Consumption 35 W
Fuse 100 - 120 V~:T630mAH
100 - 120 V~:T315mAH
Mains Connection Standard IEC receptacle
Dimensions/Weight
Dimensions (W x H x D) 480 mm x 88 mm x 148 mm (18.9” x 3.5” x 6.0”)
Weight 2.5 kg (5.51 lbs)

11
A6600B
DIMENSION
* All measurements are shown in mm/inches.
480.4 / 18.91
127.5 / 5.02
152.9 / 6.02
88 / 3.46

12 A6600B
BLOCK DIAGRAM

TO PURCHASE ADDITIONAL PHONIC GEAR AND ACCESSORIES
To purchase Phonic gear and optional accessories, contact any authorized Phonic
distributor. For a list of Phonic distributors please visit our website at www.phonic.com and
click on Get Gear. You may also contact Phonic directly and we will assist you in locating
a distributor near you.
SERVICE AND REPAIR
For replacement parts, service and repairs please contact the Phonic distributor in your
country. Phonic does not release service manuals to consumers, and advice users to not
attempt any self repairs, as doing so voids all warranties. You can locate a dealer near you
at http://www.phonic.com/where/.
WARRANTY INFORMATION
Phonic stands behind every product we make with a no-hassles warranty. Warranty
coverage may be extended, depending on your region. Phonic Corporation warrants this
product for a minimum of one year from the original date of purchase against defects in
material and workmanship under use as instructed by the user’s manual. Phonic, at its
option, shall repair or replace the defective unit covered by this warranty. Please retain the
dated sales receipt as evidence of the date of purchase. You will need it for any warranty
service. No returns or repairs will be accepted without a proper RMA number (return
merchandise authorization). In order to keep this warranty in effect, the product must have
been handled and used as prescribed in the instructions accompanying this warranty. Any
tempering of the product or attempts of self repair voids all warranty. This warranty does
not cover any damage due to accident, misuse, abuse, or negligence. This warranty is
valid only if the product was purchased new from an authorized Phonic dealer/distributor.
For complete warranty policy information, please visit http://www.phonic.com/warranty/.
CUSTOMER SERVICE AND TECHNICAL SUPPORT
We encourage you to visit our online help at http://www.phonic.com/support/. There you
can find answers to frequently asked questions, tech tips, driver downloads, returns
instruction and other helpful information. We make every effort to answer your questions
within one business day.
[email protected] http://www.phonic.com