Phonic SupraCurve A6600 User manual

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A6600
SupraCurve
INTRODUCTION................................4
FEATURES ........................................4
GETTING STARTED..........................4
FRONT PANEL DESCRIPTION.......5
REAR PANEL DESCRIPTION.........6
TYPICAL GRAPHIC EQUALIZER
OPERATION ......................................7
BLOCK DIAGRAM............................8
DIMENSIONS.....................................9
SPECIFICATIONS............................10
APPENDIX .......................................11
TABLE OF CONTENTS

PHONIC CORPORATION
Page 4 A6600 USER
’ S MANUAL
INTRODUCTION / FEATURES / GETTING STARTED
INTRODUCTION
Congratulations on your purchase of the A6600
SUPERCURVE, a dual 31-band graphic equalizer. In
order to get the best performance from your A6600
SUPERCURVE, please read this user’ s manual
carefully and keep it for future reference.
FEATURES
●Extremely low noise, high-quality performance
●30mm VR for precise adjustment
●Switchable boost/cut range: 6dB and 12dB
●EQ IN/OUT switch
●Center-dented sliders
●Illuminated buttons and faders
●+/-15dB input gain range for easy level matching
●8-segment LED input level display with CLIP
warning
●Dual variable 15Hz to 400Hz LOW CUT filter and
2.5KHz to 30KHz HIGH CUT filter
●Auto relay-controlled bypass
●Balanced inputs and outputs
●1/4" TRS and XLR connectors
●Shielded toroidal power transformer for low noise
interference
GETTING STARTED
1 Check the AC voltage before connecting the plug.
The unit must be properly grounded to avoid electrical
shock to the operator. Choose the main supply for the
sound system with care, and do not share sockets or
grounding with light dimmers.
2 Separate audio cables from dimmer wiring, using
balanced lines wherever possible. If feasible, cross
audio and lighting cables at right angles to minimize
the possibility of interference. Keep unbalanced
cables as short as possible.
3 Check your cables regularly and label each end for
easy identification.
4 Before switching on the main power, set the input
level control to its minimum setting. Doing so will
prevent excessive noise caused by bad level
adjustment, faulty wiring, defective cables, or bad
connections.
5 Always turn the unit on before turning on the
power amplifier; always turn it off after turning off the
amplifier.
6 Always turn off the main power before connecting or
disconnecting the unit.
7 Never use solvents to clean the unit. Clean the unit
with a soft, dry cloth.

PHONIC CORPORATION Page 5
A6600 USER
’ S MANUAL
0
+12/+6
-12/-6
0
+12/+6
-12/-6
12.5K 16K 20K
A6600
SupraCurve
1
0
+12/+6
-12/-6
0
+12/+6
-12/-6
FILTER
FILTER
1
2
CLIP
1 2+ 60- 6- 1 2- 1 8- 2 4
CLIP
1 2+ 60- 6- 1 2- 1 8- 2 4
-15 +15
dB
INPUT
0
-15 +15
dB
INPUT
0
EQ INEQ IN
RANGE
12dB
6dB
20 25 31.5 40 50 63
EQ INEQ IN
RANGE
12dB
6dB
3246
57
FRONT PANEL DESCRIPTION
FRONT PANEL DESCRIPTION
1 INPUT level control
The INPUT level control allows you to adjust the input
signal level (volume).
2 LEVEL METER with CLIP LED
The LEVEL METER provides instant monitoring of output
signal level. To avoid possible distortion, reduce the input
level if the CLIP LED lights up. For the LED to blink briefly
during the loudest parts of your program is acceptable; if
it stays on for several seconds, however, distortion may
begin to occur.
3 LOW CUT FILTER
The LOW CUT FILTER allows high frequencies to pass
through unchanged while severely attenuating (cutting)
very low frequencies. Use this switch to protect your
audio system from damaging low-frequency transients
(loud thumps).
4 HIGH CUT FILTER
The HIGH CUT FILTER allows low frequencies to pass
through unchanged while effectively attenuating very
high frequencies.
5 EQ IN button
Depress this button to activate the A6600; it will light up
yellow. Release it to terminate all A6600 functions,
providing an immediate comparison between the original
sound and the sound as processed by the A6600.
6 EQ RANGE selector button
One benefit of using a graphic equalizer is that the
frequency sliders form a graphic depiction of the
frequency response curve you have set. When the
setting requirements are subtle, however, it may not be
easy to identify the curve. If you encounter this difficulty,
depress the EQ RANGE selector switch to increase the
range of the level settings.
When depressed, the button will light up red and set the
range at 6dB. When released, the same button will light
up green and set the range at 12dB.
7 Illuminated frequency level slider
Moving the illuminated slider upward increases the
level of the related frequency; moving it downward
decreases the level of the related frequency.
The operations of channel 1 & channel 2 are exactly the same.

PHONIC CORPORATION
Page 6 A6600 USER
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REAR PANEL DESCRIPTION
REAR PANEL DESCRIPTION
8 INPUT
Each channel has an XLR male connector and a
balanced 1/4" jack for input connection.
9 OUTPUT
Each channel has an XLR female connector and a
balanced 1/4" jack for output connection.
10 POWER switch
Use this switch to turn the A6600 on and off. Turn the
A6600 on before turning on the power amplifier; doing
so will prevent loud transients which can damage your
speakers and create noises unpleasant for your
audience.
11 AC power socket with fuse holder
Connect the supplied AC power cord to this socket, then
insert the plug into a wall socket of suitable voltage. A
blown fuse may be replaced only by a fuse of identical
type and rating.
CTRIQUE
THE RISK OF
OT EXPOSE
OISTURE.
ANCED)
PUT
(G)(+)
UNBALANCED
BALANCED
-
( )
JACK CONFIGURATIONS
FOR INPUT JACKS
JACK CONFIGURATIONS
FOR INPUT JACKS
XLR-ASSIGN
1: GND
2:
3:
1: GND
2:
3:
+
-
12
3
1 2
3
INPUT OUTPUT
POWER
~100V AC 60Hz
~120V AC 60Hz
~230V AC 50Hz
~240V AC 50Hz
100~120V AC
FUSE 500 mA
220~240V AC
FUSE T315mA
CH2
(BALANCED)
OUTPUT
(BALANCED)
INPUT
11 10 8
9
The operations of channel 1 & channel 2 are exactly the same.

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A6600 USER
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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.
LARGE ROOM EQUALIZATION
Large rooms tend to suffer from multiple reflections 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 benefits 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 reflected 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.
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.
Here is a frequency range chart for your reference -- it 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 reflected 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.

PHONIC CORPORATION
Page 8 A6600 USER
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BLOCK DIAGRAM
6.3K
+6DB
+12DB
8K
2.5K
1.6K
20K
16K160100
125
315
CH2 OUT
CH2 OUT
800
630
250
EQ IN2
EQ IN2
1.6K
3.15K
2K
800 5K
AMP
CH2_LED
CH1 OUT
CH1 OUT
2K
RELAY2
CH1 OUT
CH1 OUT
1.25K
INPUT
5K
+6DB
+12DB
250
HIGH CUT
HIGH CUT
BUFFER
4K
LOW CUT
LOW CUT
25
10K
12.5K200
INPUT
3.15K
EQ IN1
EQ IN1
CH1_LED
LOW CUT
LOW CUT
40
HIGH CUT
HIGH CUT
50
6.3K400
12.5K
500 500
31
160100
80
125
1K
RELAY1
8K
63025
10K
20K
2.5K
16K
CH2 OUT
CH2 OUT
20
50
63 4K
BUFFER
20
400
1.25K200
40
315
31 80
1K
63
AMP
-15V
ON
-15V
+15V
ON
+15V
CH2 INPUT
CH2 INPUT
HIGH CUT AND
HIGH CUT AND
EQ1
2
3
BOOST
HIGH CUT AND
HIGH CUT AND
EQ2
DR
3
2 2
EQ1 OF VR LED 1*31
EQ1 OF VR LED 1*31
CUT
CH1 INPUT
CH1 INPUT
CUT
1
LOW CUT
LOW CUT
3 3
6DB LED
6DB LED
1
EQ LED
EQ LED
1
LOW CUT
LOW CUT
1
CH2 INPUT
CH2 INPUT
EQ2 OF VR LED 1*31
EQ2 OF VR LED 1*31
BOOST
2
DR
CH1 INPUT
CH1 INPUT
6/12dB LED
6/12dB LED
EQ LED
EQ LED
BLOCK DIAGRAM

PHONIC CORPORATION Page 9
A6600 USER
’ S MANUAL
DIMENSIONS
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PP
PP
DIMENSIONS

PHONIC CORPORATION
Page 10 A6600 USER
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SPECIFICATIONS
INPUT
Connectors XLR & 1/4" TRS balanced, line level (+4 dBu), RF filtered
Impedance 56k ohms
Maximum level +24 dBu balanced and unbalanced
OUTPUT
Connectors XLR & 1/4" TRS balanced
Impedance 100 ohms
Maximum level +24 dBu
SYSTEM
Frequency Response 10 Hz to 35 kHz, +/- 3 dB
20 Hz to 20 kHz, +/- 0.25dB (flat)
20 Hz to 20 kHz, +/- 1 dB (max/min)
THD 0.004% typical at +4 dBu, 1 kHz
Noise < -87 dB
Crosstalk < -80 dB
FILTERS
Low-cut 15 Hz to 400 Hz variable, -18 dB/oct
High-cut 2.5 kHz to 30 kHz variable, -18 dB/oct
EQUALIZER
Center Frequency ISO Standard 31-band, 1/3 octave, 20 Hz to 20 kHz
Range +/- 6 dB or +/- 12 dB, selectable
CONTROLS & DISPLAY
Input Adjusts the input gain
Low-Cut Filter Determines the low-cut frequency
High-Cut Filter Determines the high-cut frequency
EQ IN Switches between EQ in and bypass
Range Switches the boost/cut range between +/- 6 and +/- 12 dB
Input Level Meter 8-segment LED meter with clip indicator
POWER SUPPLY
Power Requirement 100-120 V, 200-240 V, AC 50/60 Hz
Power Consumption 15 W
Power Connector Standard IEC receptacle
Fuse 100-120 V: 1 A / 250 V
200-240 V: 500 mA / 250 V
PHYSICAL
Enclosure Steel housing with aluminum front panel
Dimensions (W x H x D) 483 x 88 x 151 mm (19 x 3.5 x 5.9 in.)
Net Weight 3.2 kg (6.9 lbs.)
SPECIFICATIONS

PHONIC CORPORATION Page 11
A6600 USER
’ S MANUAL
APPENDIX
Phonic recommends the following books for those
interested in advanced audio engineering and sound
system operation:
• "Sound System Engineering" by Don and Carolyn
Davis, Focal Press, ISBN: 0-240-80305-1
• "Sound Reinforcement Handbook" by Gary D.
Davis, Hal Leonard Publishing Corporation, ISBN:
0-88188-900-8
• "Audio System Design and Installation" by Philip
Giddings, Focal Press, ISBN: 0-240-80286-1
• "Practical Recording Techniques" by Bruce and
Jenny Bartlett, Focal Press, ISBN: 0-240-80306-X
• "Modern Recording Techniques" by Huber &
Runstein, Focal Press, ISBN: 0-240-80308-6
• "Sound Advice : The Musician’s Guide to the
Recording Studio" by Wayne Wadham, Schirmer
Books, ISBN: 0-02-872694-4-0
• "Professional Microphone Techniques" by David
Mills Huber, Philip Williams. Hal Leonard Publishing
Corporation, ISBN: 0-87288-685-9
• "Anatomy of a Home Studio: How Everything
Really Works, from Microphones to Midi" by Scott
Wilkinson, Steve Oppenheimer, Mark Isham. Mix
Books, ISBN: 091837121X
• "Live Sound Reinforcement: A Comprehensive
Guide to P.A. and Music Reinforcement Systems and
Technology" by Scott Hunter Stark. Mix Books, ISBN:
0918371074
• "Audiopro Home Recording Course Vol 1: A
Comprehensive Multimedia Audio Recording Text" by
Bill Gibson. Mix Books, ISBN: 0918371104
• "Audiopro Home Recording Course Vol. 2: A
Comprehensive Multimedia Audio Recording Text" by
Bill Gibson. Mix Books, ISBN: 0918371201
APPENDIX