Alto EQU MKII series User manual

EQU MKII series
Alto
Brand
Alto
Model
EQU MKII series
Category
Audio equalizers
Type
User manual
User's Manual
EQU MKII SERIES
www.altoproaudio.com
Version 1.2 NOV. 2007
LTO
R
English
15/31 BANDS GRAPHIC EQUALIZER
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
IMPORTANT SAFETY INSTRUCTION
TO REDUCE THE RISK OF ELECTRIC SHOCK
PLEASE DO NOT REMOVE THE COVER OR
THE BACK PANEL OF THIS EQUIPMENT.
THERE ARE NO PARTS NEEDED BY USER
INSIDE THE EQUIPMENT. FOR SERVICE,
PLEASE CONTACT QUALIFIED SERVICE
CENTERS.
WARNING
To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Dispose of this product should
notbeplacedinmunicipalwaste
and should be separate collection.
11.
12.
MovethisEquipmentonlywithacart,
stand, tripod, or bracket,
specified by the
manufacturer, or
sold with the
Equipment. When
a cart is used, use
caution when
moving the cart /
equipment
combination to
avoid possible
injury from tip-over.
Permanent hearing loss may be caused by
exposure to \ extremely high noise levels.
The US. Government's Occupational Safety
and Health Administration (OSHA) has
specified the permissible exposure to noise
level.
These are shown in the following chart:
According to OSHA, an exposure to high SPL in
excess of these limits may result in the loss of
heat. To avoid the potential damage of heat, it is
recommended that Personnel exposed to
equipment capable of generating high SPL use
hearing protection while such equipment is
under operation.
This symbol, wherever used, alerts you to the
presence of un-insulated and dangerous voltages
within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
This symbol, wherever used, alerts you to
important operating and maintenance instructions.
Please read.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
The apparatus shall be connected to a mains
socket outlet with a protective earthing
connection.
The mains plug or an appliance coupler is used
as the disconnect device, the disconnect device
shall remain readily operable.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
Read this Manual carefully before operation.
Keep this Manual in a safe place.
Be aware of all warnings reported
with this symbol.
Keep this Equipment away from water and
moisture.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
Do not damp or cover any cooling opening.
Install the equipment only in accordance with
the Manufacturer's instructions.
Power Cords are designed for your safety. Do
not remove Ground connections! If the plug
does not fit your AC outlet, seek advice from
a qualified electrician. Protect the power
cord and plug from any physical stress to
avoid risk of electric shock. Do not place
heavy objects on the power cord. This could
cause electric shock or fire.
Unplug this equipment when unused for long
periods of time or during a storm.
Refer all service to qualified service personnel
only. Do not perform any servicing other than
those instructions contained within the
User's Manual.
To prevent fire and damage to the product,
use only the recommended fuse type as
indicated in this manual. Do not short-circuit
the fuse holder. Before replacing the fuse,
make sure that the product is OFF and
disconnected from the AC outlet.
HOURS X DAY
EXAMPLE
8
6
4
3
2
1,5
1
0,5
0,25 or less
SPL
90
92
95
97
100
102
105
110
115
Small gig
train
Subway train
High level desktop monitors
Classic music concert
Rock concert
IN THIS MANUAL:
1. INTRODUCTION.........................................................................1
2. FEATURES................................................................................1
3. CONTROL ELEMENTS................................................................2
4. APPLICATION............................................................................7
5. INSTALLATION & CONNECTION...................................................9
6. TECHNICAL SPECIFICATIONS
7. WARRANTY.............................................................................13
.....................................................12
1. INTRODUCTION
Thank you for your purchasing the EQU MKII series Graphic Equalizers.
With the EQU MKII series Graphic Equalizers you have acquired extremely
musical and flexible Graphic Equalizer. The high-end EQU MKII series are
based on many years of experience and are designed to provide a permanent
precise equalization to musician, performer, and studio engineer. They can be
used wherever is requested to modify the frequency "contour" of a sound and
can offer a solution to many common sound problems and allows the user to
use the creativity to obtain nice results in terms of sound characterization.
EQU Series Graphic Equalizers include the following seven models:
EQU131-MKII V2-Graphic Mono 31-Band Equalizer
EQU215-MKII V2-Graphic Stereo 15-Band Equalizer
EQU215TWIN-MKII-Graphic Stereo 15-Band Equalizer
EQU131VU-MKII-Graphic Mono 31-Band Equalizer/VU Meter 1
EQU231VU-MKII V2-Graphic Stereo 31-Band Equalizer/VU Meter 2
EQU231-MKII V2-Graphic Stereo 31-Band Equalizer
EQU231TWIN-MKII V2-Graphic Stereo 31-Band Equalizer
1
2. FEATURES
Constant Q circuitry with a 3% center frequency accuracy
Control range 6 dB/ 12 dB selectable
Active balanced and unbalanced input and output connectors
Variable input level control
Signal clip pilot
Ground "LIFT" switch to disconnect signal ground from chassis ground
Power off automatic bypass function
Line voltage selectable
Robust and compact design
Mountable in a 19" rack unit(1U)
Manufactured Under QS9000, VDA6.1 certified management system
Enjoy your EQU MKII and make sure to read this Manual carefully before
operation.
Dual 15 Band Graphic Equalizer
Channel One
63 250 1.6K 6.3K40 160 1K 4K25 100 630400 2.5K 10K 16K 63 250 1.6K 6.3K40 160 1K 4K25 100 630400 2.5K 10K 16K
INPUT
LEVEL
0
+12
-12
+6
-6
INPUT
LEVEL
0
+12
-12
0dB
+12
-12
+6
-6
Channel Two
INPUT
OUTPUT
SIG
CLIP
SIG
CLIP
RANGE
6
12
EQ
ON
16KHz
LOW-PASS
40Hz
HI-PASS
0dB
+12
INPUT
OUTPUT
SIG
CLIP
SIG
CLIP
RANGE
6
12
EQ
ON
16KHz
LOW-PASS
40Hz
HI-PASS
-12
EQU215TWIN
MK
R
LTO
Dual 15 Band Graphic Equalizer
R
LTO
63 250 1.6K 6.3K
40 160
1K
4K
25
100
630
400
2.5K
10K
0
+12
-12
+6
-6-6
0dB
+12
-12
Channel One
LEVEL
16K
INPUT
OUTPUT
126
ON
EQ
RANGE
40Hz
HI-PASS
16KHz
LOW-PASS
SIG
CLIP
SIG
CLIP
63 250 1.6K 6.3K
40 160
1K
4K
25
100
630
400
2.5K
10K
LEVEL
0
+12
-12
+6
-6
Channel Two
0dB
+12
-12
16K
INPUT
OUTPUT
126
ON
EQ
RANGE
40Hz
HI-PASS
16KHz
LOW-PASS
SIG
CLIP
SIG
CLIP
EQU215
MK V2
R
LTO
31 Band Graphic Equalizer
31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K20
INPUT
LEVEL
0
+12
-12
0dB
+12
-12
+6
-6
INPUT
OUTPUT
OUTPUT
SIG
CLIP
SIG
CLIP
RANGE
EQHI
PAS S
6
12
ON
16KHz
40Hz
LOW
PAS S
EQU131VU
MK
POWER OUTPUT
LTO
R
3. CONTROL ELEMENTS
SPOTLIGHT
Front panel
1
11
3
9
2
10
12
5
6
8
7
4
EQU131VU-MKII
EQU215-MKII V2
4
8
7
1
1
5
6
2
3
12
9
10
11
EQU131-MKII V2
11
8
6
5
3
1
EQU215TWIN-MKII
12
9
10
1
22
4
11
12
9
10
2
3
4
5
8 7
13
6
1
2
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40
80
160 400
1K 2K
5K
10K63 125 315
800
250 630 1.6K
4K
3.15K
8K
16K 20K
R
LTO
INPUT
OUTPUT
ON
40Hz 16KHz
126
SIG
CLIP
SIG
CLIP
EQRANGE
HI
PASS
LOW
PASS
31 Band Graphic Equalizer
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
+6
-6
EQU131
MK V2
7
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
20 31.5 50 100 200 2.5K 6.3K 12.5K25 40
80
160
2K
5K
10K63 125 315250 1.6K
4K
3.15K
8K
16K 20K500 1.25K400
1K
800
630
Channel One
Channel Two
Dual 31 Band Graphic Equalizer
0
+12
-12
0dB
+12
-12
+6
-6
INPUT
LEVEL
INPUT
LEVEL
0
+12
-12
0dB
+12
-12
+6
-6
INPUT
OUTPUT
CLIP
RANGE
12
ON
16KHz
40Hz
LOW-PASSHI-PASS
SIG
CLIP
EQ
SIG
6
INPUT
OUTPUT
CLIP
12
ON
16KHz
40Hz
SIG
CLIP
RANGE
EQLOW-PASSHI-PASS
SIG
6
EQU231TWIN
MK V2
R
LTO
20 31.5 50 100 200 2.5K 6.3K 12.5K25 40
80
160
2K
5K
10K63 125 315250 1.6K
4K
3.15K
8K
16K 20K
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
500 1.25K400
1K
800
630
INPUT
LEVEL
INPUT
LEVEL
0
0dB
+12
-12
0
0dB
+12
-12
+12
-12
+12
-12
+6
+6
-6
-6
INPUT OUTPUT
SIG
CLIP
SIG
CLIP
RANGE
EQ
HI-PASS
LOW-PASS
6
12
ON
16KHz
40Hz
RANGE
HI-PASS
LOW-PASS
6
12
ON
16KHz
40Hz
SIG
CLIP
SIG
CLIP
INPUT OUTPUT
EQ
OUTPUT
OUTPUT
Dual 31 Band Graphic Equalizer
Channel One
Channel Two
EQU231VU
MK V2
R
LTO
0
0
VU
20
10
6
3
0
3
5
50 100
POWER OUTPUT
LTO
R
VU
20
10
6
3
0
3
5
50 100
POWER OUTPUT
LTO
R
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
Channel One
Channel Two
Dual 31 Band Graphic Equalizer
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
+6
-6
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
-6
+6
INPUT OUTPUT
ON40Hz 16KHz
126
SIG
CLIP
SIG
CLIP
EQRANGE
HI
PAS S
LOW
PAS S
ON40Hz 16KHz
12
6
EQRANGE
HI
PASS
LOW
PASS
INPUT OUTPUT
SIG
CLIP
SIG
CLIP
EQU231
MK V2
R
LTO
3
EQU231VU-MKII V2
1
2
12
5
3
7
8
11
9
10
13
4
6
3. CONTROL ELEMENTS
SPOTLIGHT
EQU231TWIN-MKII V2
8
7
11
12
1
2
10
3
5
6
4
9
EQU231-MKII V2
8
6
5
7
2
4
10
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
12
9
3
11
1
1
Filter level controls
Each one of these linear potentiometers will boost or attenuate (either 6dB or
12 dB) the selected frequency at a preset bandwidth. When all the sliders are
in the centre position, the output of the equalizer is flat response.
3. CONTROL ELEMENTS
SPOTLIGHT
2 Level control
This control sets the input signal level of the equalizer. The "0 dB" position is unity
gain (no boost or attenuation). If the clip LED (5) lights continuously, turn down
this control until it only blinks occasionally.
3 High-pass Filter
This button electronically inserts a filter into the signal path, which cuts the low
frequencies at 40 Hz (12 dB per octave). The LED (12) indicator lights up when
the button is pressed and this filter is serving in the circuit.
4
Low-pass Filter
This button electronically inserts a filter into the signal path, which cuts the high
frequencies at 16 K (12 dB per octave). The LED (13) indicator lights up when
the button is pressed and this filter is serving in the circuit.
5
6
7
10
11
8
9
Clip LED
This LED will light up when any section of the equalizer is within 5 dB of
clipping. Occasional blinking of this clip LED is acceptable, but if it remains on
continuously, you should turn down the level control or reduce the output level
of the preceding component to avoid audible distortion.
Signal LED
This green LED will light up when any signal appears at Input/Output stage.
EQ switch
This switch inserts or removes the equalizer to channel path. If press this switch,
the EQ LED (8) will be illuminated, which means it is in EQ mode. When release
this switch, the input signal is routed directly into the output jacks, which means
it is in bypass mode.
Filter range indicator
When the 6 dB range is selected, green LED will light up. When the 12 dB range
is selected, red LED will light up.
VU Meter (Only for EQU131VU-MKII/231VU-MKII V2)
This VU meter is used to indicate the output level.
EQ LED
When this LED lights up, it is in EQ mode.
Range switch
This button switches the gain range of the filter slider between 6 dB and 12 dB.
12
13
High-pass LED
When the High pass filter (40 Hz/12 dB) is actived, this LED will light up.
Low-pass LED
When the Low pass filter (16 kHz/12 dB) is actived, this LED will light up.
4
GND
LIFT
O
N
O
F
F
P
O
W
E
R
SERIAL
MODEL
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 9W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T160mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
PUSH
The rear panel
3. CONTROL ELEMENTS
SPOTLIGHT
EQU131-MKII V2
GND
LIFT
SERIAL
MODEL
O
N
O
F
F
P
O
W
E
R
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 9W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T160mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
PUSH
21
3
NEW TIDE
16
15
18
17
15
16
17
14
19
EQU215-MKII V2
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 9W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T160mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
GND
LIFT
O
N
O
F
F
P
O
W
E
R
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
CHANNEL 1
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
CHANNEL 2
PUSH PUSH
15
16
17
15
16
17
1814
19
EQU131VU-MKII
14
15
16
17
15
16
17
18
19
EQU231VU-MKII V2/EQU231-MKII V2
GND
LIFT
SERIAL
MODEL
O
N
O
F
F
P
O
W
E
R
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 18W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T200mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
CHANNEL 1
CHANNEL 2
PUSH
PUSH
15
16
17
15
16
17
18
19
14
EQU215TWIN-MKII
PUSH
PUSH
GND
LIFT
O
N
O
F
F
P
O
W
E
R
SERIAL
MODEL
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 9W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T160mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
CHANNEL 1
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
CHANNEL 2
15
16
17
15
16
17
14 18
19
5
6
3. CONTROL ELEMENTS
SPOTLIGHT
19 AC Inlet/Fuse holder
Standard IEC receptacle. Connect your equalizer an AC socket with the supplied
power cord. Before powering up your equalizer for the first time, make certain
the stated power requirement of the unit matches the voltage supplied by the
AC socket.
If the fuse blows, replaced with a fuse of the correct type only.
EQU231TWIN-MKII V2
O
N
O
F
F
P
O
W
E
R
SERIAL
MODEL
AC INPUT
95-120V /210-240V 60-50Hz
Rated Power Consumption 18W
FUSE:
210-240V: T100mAL 250VAC
95-120V: T200mAL 250VAC
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
GND
LIFT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
INPUT
BALANCEDUNBALANCED
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
OUTPUT
CHANNEL 1
CHANNEL 2
PUSH
PUSH
15
16
17
15
16
17
18
19
14
18
Ground lift switch
This switch is used to disconnect the signal ground from the mains and chassis
earth. If it is determined that the equalizer is the cause of hum or buzz in your
system due to a ground loop, move this switch to "lift" position.
14
Power switch
It switches the unit ON and OFF.
15 XLR IN/OUT connectors
The XLR connectors are balanced and are used to Input/Output the signal.
16 1/4" TRS phone IN/OUT connectors
The 1/4" TRS connector are balanced and are used to Input/Output the signal.
17 RCA IN/OUT connectors
The RCA connectors are unbalanced.
While you can use any input connector with any output connector, only
one set of these connectors is to be used at one time (The wiring and
connection, details please refer to 5.2 audio connection).
NOTE:
4. APPLICATION
7
CDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABCDEFGABC
25 31 40 50 62 80 100 125 160 200 250 320 400 500 640 800 1K 1.3K 1.6K 2K 2.5K 3.1K 4K 5K 6.2K 8K 10K 13K 16K 20K
25 31 40 50 62
80
100 125 160 200 250 320 400 500 640
800
1K
1.3K 1.6K
2K
2.5K 3.1K
4K
5K
6.2K
8K
10K 13K 16K 20K
Mid C
Human hearing range
Vocal
Soprano
Contralto
Baritone
Bass
WOODWIND
Piccolo
Flute
Oboe
Clarinet in B flat or A
Clarinet in E flat
Brass
Bass Clarinet
Basset Horn
Cor Anglais
Bassoon
Double Bassoon
Soprano Saxophone
Alto Saxophone
Tenor Saxophone
Bass Saxophone
Baritone Saxophone
Cello
TrumpetinC
TrumpetinF
Alto Trombone
Tenor Trombone
Bass Trombone
Tuba
Valve Horn
STRINGS
Violin
Viola
Pianoforte
Double Bass
Guitar
KEYBOARDS
PERCUSSION
Organ
FREQUENCY
Celesta
Timpani
Xylophone
4.1 The Sound Frequency
In recording studios as well as stage or radio plays, the equalizer will give you
a perfect contour of your sound. But first of all, you should clarify the typical
frequency of each instrument and voice, so that you can obtain nice results in
terms of sound characterization. The following table will give you an idea of
specific frequencies and their acoustic significance.
Typical Frequency of Each Instrument and Voice
4. APPLICATION
4.2 Application on
line instrument
The EQU MKII Series Graphic Equalizer can be used on an entire mix "In-line"
between a instrument outputs and a power amplifier, and this is the basic
application in the PA system to offer precise equalization control.
From line instrument outputs To power amplifier inputs
CH1 IN
CH2 IN
CH1 OUT
CH2 OUT
8
NOTE: Mono/Stereo Application
. For mono application, please use the ,
mono Graphic Equalizer.
a EQU131-MKII V2
EQU131VU-MKII
. For stereo application, please use the
stereo Graphic Equalizer, either
of the two channels can be used as L/R input & output.
b EQU215-MKII V2,
EQU215TWIN-MKII, EQU231-MKII V2, EQU231VU-MKII
or EQU231TWIN-MKII V2
4.3 Mixing Console
The EQU MKII Series Graphic Equalizer can also be used on a single
instrument by connecting to a mixing console's main inserts, especially for
those consoles without built-in equalization circuitry.
Main Inserts 2
CH1 IN
CH1 OUT
CH2 IN
CH2 OUT
Send 1
Send 2
Main Inserts 1
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
Channel One
Channel Two
Dual 31 Band Graphic Equalizer
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
+6
-6
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
-6
+6
INPUT OUTPUT
ON40Hz 16KHz
126
SIG
CLIP
SIG
CLIP
EQRANGE
HI
PASS
LOW
PASS
ON40Hz 16KHz
12
6
EQRANGE
HI
PASS
LOW
PASS
INPUT OUTPUT
SIG
CLIP
SIG
CLIP
EQU231
MK V2
R
LTO
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
Channel One
Channel Two
Dual 31 Band Graphic Equalizer
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
+6
-6
INPUT
LEVEL
0
0dB
+12
-12
+12
-12
-6
+6
INPUT OUTPUT
ON40Hz 16KHz
126
SIG
CLIP
SIG
CLIP
EQRANGE
HI
PASS
LOW
PASS
ON40Hz 16KHz
12
6
EQRANGE
HI
PASS
LOW
PASS
INPUT OUTPUT
SIG
CLIP
SIG
CLIP
EQU231
MK V2
R
LTO
5. INSTALLATION AND CONNECTION
5.1 Mains Connection
Please ensure that the equalizer is set to the correct supply voltage before
plugging the power cord into the wall outlet, use the same fuse as marked
on the fuse holder at the AC power connection socket. The mains connections
of the EQU MKII Series Graphic Equalizer is made by using the enclosed
mains cord and a standard IEC receptacle. It meets all of the international
safety certification requirements.
5.2 Audio Connection
The equalizer presents with balanced XLR and 1/4" TRS and unbalanced RCA
connectors. It can be interfaced in several ways to support a variety of
applications without any signal loss. The equalizer can be used on a single
instrument by connecting to the mixing console's main inserts, or on an entire
mix "in-line" between a mixing console's outputs and a power amplifier. The
defective wiring may degrade the performance of equalizer, so please use good
quality screened audio cables only. Please follow the guide below to interface
equalizer without experiencing any noise or signal loss.
9
Ok, you have got to this point and you are now in the position to operate your
equalizer successfully. However, we advise you to read carefully the following
section to be real master of your own equalizer. Not paying attention enough to
the input signal level, to the routing of the signal and the assignment of the
signal will result in unwanted distortion, a corrupted signal or no sound at all.
So you should follow this procedure for every single channel:
Strain Clamp
Sleeve
Tip
Ring
Sleeve=Ground/Screen
Ring=Right Signal
Tip=Left Signal
Use for Headphone
1/4" Stereo (TRS) Jack Plug
Strain Clamp
Sleeve
Tip
Sleeve=Ground/Screen
Tip=Signal
Use for Mono Line In, Mono 1/4" Jack Plugs
1/4" Mono (TS) Jack Plug
5. INSTALLATION AND CONNECTION
10
Strain Clamp
Sleeve
Tip
Ring
Sleeve=Ground/Screen
Ring=Return Signal
Tip=Send Signal
Use for Insert Points
1/4" Stereo (TRS) Jack Plug
2=Hot(+)
3=Cold(-)
1=Ground/Screen
(seen from soldering side)
Use for Balanced Mic Inputs
(For unbalanced use, connect pin 1 to 3)
3-pin XLR Male Plug
2=Hot(+)
3=Cold(-)
1=Ground/Screen
3-pin XLR Line Socket
(seen from soldering side)
1
2
3
1
2
3
Use for Main output
(For unbalanced use, leave pin3 unconnected)
Insert Leads
21
3
1
2
3
TIP RING SLEEVE
Tip
Ring
Sleeve
1
2 (Send)
3
1
2 (Return)
3
TIP RING SLEEVE
Centre (Send)
Screen
Centre (Return)
Screen
Tip
Ring
Sleeve
SLEEVE TIP
SLEEVE RING TIP
TIPRINGSLEEVE
Tip
Ring
Sleeve
Tip (Send)
Sleeve
Sleeve
Tip (Return)
5.3 Line Connection
For these applications the EQU MKII Series Graphic Equalizers provide 1/4"
TRS connector, XLR connectors and RCA connectors to easily interface with
most any professional audio device. Follow the configuration examples below
for your particular connection.
5. INSTALLATION AND CONNECTION
Banlanced
Tip
Ring
Sleeve
Tip
Ring
Sleeve
TIP RING SLEEVE
SLEEVE RING TIP
Tip
Ring
Sleeve
1
2
3
TIP RING SLEEVE
1
2
3
1
2
3
1
2
3
21
3
1
2
3
Unbalanced
Tip
Ring
Sleeve
1
2
3
TIP RING SLEEVE
1
2
3
Tip
Sleeve
Centre
Centre
Screen
Screen
Tip
Ring
Sleeve
1
2
3
1
2
3
TIP SLEEVE
TIP RING SLEEVE
1
2
3
2
1
3
Centre
Screen
1
2
3
2
1
3
Tip
Sleeve
1
2
3
TIP SLEEVE
1
2
3
Tip
Sleeve
Tip
Sleeve
TIP SLEEVE SLEEVE TIP
Tip
Ring
Sleeve
Tip
Ring
Sleeve
TIP RING SLEEVE SLEEVE RING TIP
11
6. TECHNICAL SPECIFICATION
Type
EQU231VU-MKII V2
EQU231-MKII V2
EQU231TWIN-MKII V2
EQU131VU-MKII
EQU131-MKII V2
EQU215-MKII V2
EQU215TWIN-MKII
Slider travel
Range
Input connections
Input impedance
Maximum input level
Output connections
Output impedance
High pass filter
Low pass filter
Frequency response
THD + N%
S/N ration
Power supply
Consumption
EQU231VU-MKII
EQU231-MKII V2
EQU231TWIN-MKII V2
EQU131VU-MKII V2
EQU131-MKII V2
EQU215-MKII V2
EQU215TWIN-MKII
Dimension
2 31-Band: 1/3 octave, ISO spacing(2H series)
2 31-Band: 1/3 octave, ISO spacing(2H series)
2 31-Band: 1/3 octave, ISO spacing(3H series)
1 31-Band: 1/3 octave, ISO spacing(2H series)
1 31-Band: 1/3 octave, ISO spacing(1H series)
2 15-Band: 2/3 octave, ISO spacing(1H series)
2 15-Band: 2/3 octave, ISO spacing(2H series)
20 mm with positive centre detent
(EQU231-MKII V2/EQU231VU-MKII V2/EQU131-MKII V2/EQU215-MKII V2)
45 mm with positive centre detent(Only for EQU231TWIN-MKII V2)
60 mm with positive centre detent(EQU131VU-MKII /EQU215TWIN-MKII)
6dBor 12dBselectable
Active balanced XLR and 1/4" TRS
Unbalanced RCA
20 k (bal.)
15 k (unbal.)
14 dBu
Active balanced XLR and 1/4" TRS
Unbalanced RCA
<600
40 Hz(12 dB/oct) fixed-button type
16 kHz(12 dB/oct) fixed-button type
20 Hz to 50kHz at -1.5 dBu
<0.01%( 1kHz, all VR at middle position)
@
110 dB
95V-120VAC-60 Hz
220V-240VAC-50 Hz/60 Hz
2 31 Band: 1/3 octave, ISO spacing:18 W
2 31 Band: 1/3 octave, ISO spacing:18 W
2 31 Band: 1/3 octave, ISO spacing:18 W
1 31 Band: 1/3 octave, ISO spacing:9 W
1 31 Band: 1/3 octave, ISO spacing:9 W
2 15 Band: 2/3 octave, ISO spacing:9 W
2 15 Band: 2/3 octave, ISO spacing:9 W
483(W) 220(D) 44(H)(19" 8.66" 1.7")mm (1H series)
483(W) 220(D) 88(H)(19" 8.66" 3.5")mm (2H series)
483(W) 220(D) 132(H)(19" 8.66" 5.1")mm (3H series)
12
7. WARRANTY
1. WARRANTY REGISTRATION CARD
To obtain Warranty Service, the buyer should first fill out and return the enclosed
Warranty Registration Card within 10 days of the Purchase Date.
All the information presented in this Warranty Registration Card gives the
manufacturer a better understanding of the sales status, so as to provide a
more effective and efficient after-sales warranty service. Please fill out all the
information carefully and genuinely, miswriting or absence of this card will void
your warranty service.
2. RETURN NOTICE
2.1 In case of return for any warranty service, please make sure that the
product is well packed in its original shipping carton, and it can protect your
unit from any other extra damage.
2.2 Please provide a copy of your sales receipt or other proof of purchase with
the returned machine, and give detail information about your return address
and contact telephone number.
2.3 A brief description of the defect will be appreciated.
2.4 Please prepay all the costs involved in the return shipping, handling and
insurance.
3. TERMS AND CONDITIONS
3.1 warrants that this product will be free from any defects in materials
LT O
and/or workmanship for a period of 1 year from the purchase date if you
have completed the Warranty Registration Card in time.
3.2 The warranty service is only available to the original consumer, who purchased
this product directly from the retail dealer, and it can not be transferred.
3.3 During the warranty service, may repair or replace this product at its
LT O
own option at no charge to you for parts or for labor in accordance with the
right side of this limited warranty.
3.4 This warranty does not apply to the damages to this product that occurred
as the following conditions:
Instead of operating in accordance with the user's manual thoroughly, any abuse
or misuse of this product.
Normal tear and wear.
The product has been altered or modified in any way.
Damage which may have been caused either directly or indirectly by another
product / force / etc.
Abnormal service or repairing by anyone other than the qualified personnel or
technician.
And in such cases, all the expenses will be charged to the buyer.
3.5 In no event shall be liable for any incidental or consequential damages.
LT O
Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above exclusion or limitation may not apply to
you.
3.6 This warranty gives you the specific rights, and these rights are compatible
with the state laws, you may also have other statutory rights that may vary
from state to state.
13
c
All rights reserved to ALTO. All features and content might be changed
without prior notice. Any photocopy, translation, or reproduction of part of this
manual without written permission is forbidden. Copyright 2007 Seikaku Group
SEIKAKU TECHNICAL GROUP LIMITED
NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
http://www.altoproaudio.com Tel: 886-4-22313737
email: [email protected] Fax: 886-4-22346757
NF01783-1.2
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Alto EQU MKII series User manual

EQU MKII series
Alto
Brand
Alto
Model
EQU MKII series
Category
Audio equalizers
Type
User manual
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