Alto Professional PS 4L User Manual
PS 4L/4LA
SPEAKER ENCLOSURE
ACTIVE/PASSIVE MODELS
User's Manual
www.altoproaudio.com
Version 1.3 Aug. 2008
English
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.
This symbol, wherever used, alerts you to the
presence of un-insulated and dangero us voltages
within the product enclosure. Th ese are voltages t hat
may be sufficient to constitute the r isk 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 turn ed on.
OFF: Denotes the product is turned off.
CAUTION
Describes precautions that should be obs erved to
prevent damage to the produ ct.
1.
Read this Manual carefully before operation.
Keep this Manual in a safe place.
2.
Be aware of all warnings reported
3.
with this symbol.
4.
Keep this Equipment away from wa ter and
moisture.
5.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
6.
Do not damp or cover any cooling o pening.
Install the equipment only in accordance with
the Manufacturer's instructions.
Power Cords are designed for yo ur safety. Do
7.
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 co uld
cause electric shock or fire.
Unplug this equipment when unused for long
8.
periods of time or during a storm.
Refer all service to qualified service personnel
9.
only. Do not perform any servicing other than
those instructions contained within the
User's Manual.
To prevent fire and damage to the product,
10.
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.
WARNING
To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.
Dispose of this product should
not be placed in municipal waste
and should be separate collection.
Move this Equipment only with a cart,
11.
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.
12.
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:
HOURS X DAY
8
6
4
3
2
1,5
1
0,5
0,25 or less
According to OSHA, an exposure to high S PL 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.
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.
EXAMPLE
SPL
Small gig
90
train
92
Subway train
95
High level desktop monitors
97
Classic music concert
100
102
105
110
115
Rock concert
IN THIS MANUAL:
1. INTRODUCTION ..................................................................................1
2. QUICK START - PS 4L .........................................................................2
3. QUICK START - PS 4LA........................................................................3
4. HOOK-UP DIAGRAMS .........................................................................4
5. RIGGING ............................................................................................5
6. PANEL DESCRIPTION-PS 4LA ..............................................................6
7. PANEL DESCRIPTION-PS 4L ................................................................7
8. TECHNICAL SPECIFICATION..................................................................8
9. WARRANTY ........................................................................................9
1. INTRODUCTION
Thank you for your purchasing of the PS4L/4LA, 2-way active sound
reinforcement speaker enclosures. It is just one of the many Alto products
that a talented, multinational Team of Audio Engineers and Musicians have
developed with their great passion for music. Your PS4L/4LA is capable of
enormous sound pressure level and it has been created to give you a
performance that is better than any loudspeaker in this range. Thanks to the
quality of its transducers, built-in amplifier and digital processor. We design
all our transducers and cabinets in Emilia-Romagna of Italy, a lowland famous
for music and fast cars. In fact, Lamborghini, Maserati and Ferrari are made
just a few miles away from our design centres. The same area has a long
tradition in designing and manufacturing some of the world's best professional
transducer and plastic moldings. Enjoy your PS4L/4LA and make sure to read
this Manual carefully before operation!
1
HOOK
2. QUICK START - PS 4L
UP
1. PS 4L PASSIVE SPEAKER CABINET
Make all initial connections with all the equipment powered off, and ensure
that all the main volume controls are turned completely down.
1). Connect one side of the speaker cable to the output CHA/CHB or Binding
Post of your stereo power amplifier and the other side to the input socket
of your speaker cabinet.
2). Complete other connections as illustrated.
3). Turn on your mixer first, then the stereo power amplifier.
4). Turn up the volume controls of your amplifier to about 70%.
5). Use PFL function to get the proper input level for the mixer, and adjust
the main mix level control to manipulate the output level.
6). After using, turn off your stereo power amplifier first, then the mixer.
2
Tripod
Mount
Speaker Cable
Stereo
Power Amplifier
SIGCLIPPROT SIGCLIPPROT
20
20
18
18
22
22
16
16
24
24
26
26
12
12
28306
28306
(dB)
(dB)
CH1
CH2
Left
Main Mix
Output
Speaker Cable
Mixer
D1
500W2
Right
Main Mix
Output
Tripod
Mount
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