Alto Q User Manual
User's Manual
www.altoproaudio.com
Version 2.0 SEP. 2007
LTO
R
English
5-BAND PARAMETRIC EQUALIZER
ALTO Q
IMPORTANT SAFETY INSTRUCTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
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.
Move this Equipment only with a cart,
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
1. INTRODUCTION........................................................................1
2. FEATURES...............................................................................1
3. CONTROL ELEMENTS..............................................................2
4. APPLICATION..........................................................................4
5. INSTALLATION & CONNECTION.................................................7
6. TECHNICAL SPECIFICATIONS....................................................8
7. WARRANTY.............................................................................9
1. INTRODUCTION
Thank you for your purchasing of the LTO Q. The LTO Q is a 5-band
parametric equalizer. It provides precise audio signal control to fixed sound
installation, live performance and studio application.
The LTO Q includes 5 channels of equalization, the variable Q controls allow
you to notch out unwanted frequencies while sweepable frequency control add
maximum flexibility to your mix.
Enjoy your LTO Q and make sure to read this Manual carefully before operation!
1
2. FEATURES
Illuminated Power Switch
Mountable in a rack unit(1U)19"
1/4" TRS type jack and balanced XLR connectors available
LED Meter (12 LEDs) to read Input and Output
Low cut and High cut filters available to cancel unwanted frequencies
Bypass function to connect automatically Input and Output
Optimum transparency of the audio signal and minimum phase shift insured
by the parallel architecture of the filters
IN/OUT Switch on every single band
Constant Q principle combination
5 bands of equalization fully parametric (gain, frequency, Q) for studio and
live applications
The frequency range of the single 5-band is overlapping. This will allow extreme
boost or attenuation
IN THIS MANUAL:
2
Front Panel:
3. CONTROL ELEMENTS
SPOTLIGHT
3. CONTROL ELEMENTS
This control is used to set the center frequency point of the filter.
3 FREQUENCY Control
This control adjusts the width and can be set from a minimum of 0.03 octaves
to a maximum of 1.6 octaves.
4 BANDWIDT ControlH
The level boost or attenuation is set by this control. The adjusting range goes
from -15 dB to +15 dB.
5 LEVEL Control
Your LTO Q includes 5 channels of equalization, 3 rotary controls and 1 switch
are present in each channel. The Master Section includes the power switch, 2
push-on switches, 3 rotary controls and 12 LEDs.
2 IN/OUT Switch
It activates/disactivates the correspondent band.
When you set this switch to ON position (green light on), the unit will be turned
on. When you set this switch to OFF position (green light off), the unit will
be turned off.
1 POWER Switch
The input jack of your LTO Q is directly connected to the output jack when this
control is on "OUT" position or if the unit is not connected to the AC socket.
It is used to cause a "hard-bypass" and disable the equalization process in the
signal path.
6 AUDIO IN/OUT Button
AUDIO
I/
/O METER
INPUT / OUTPUT LEVEL (dB)
30
241812
6 30
3 6 9 12 18
dB
75
Hz
50 110
25 200
40010
LOW CUT
10
7
15
22
3.5
2.5 30
KHz
0
15
5
10
15
5
10
OUT
IN
OUTIN
5-BAND
PARAMETRIC
EQUALIZER
POWER
IN//OUT
KHz
OCTAVE
dB
5.1
2.2 7.0
12
1.3
1.0 20
1.2
0
0.03 1.6
15
15
5
10
5
1KHz - 20KHz
FREQUENCY
BANDWIDTH LEVEL
10
IN
OUT
INPUT
HIGH CUT
OFF
ON
BAND 5
LTO Q
1
2
3 4 5 6
7
8
9
10
11
7 LOW CUT Control
When activate this control, it will cut the low frequencies with a slope of 12 dB
per octave in a range of 10 Hz to 400 Hz. So if you set this control at the
maximum position of 10 Hz, the audio signal will pass through without alteration.
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