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
HOOK
3. QUICK START - PS 4LA
UP
2. PS 4LA ACTIVE 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 signal cable at your audio mixer into output
left /right (with Stereo-Jack or XLR) and the other side of the cable into
the line input (Stereo-Jack) of your active speaker cabinet.
2). Connect the power cord to mains.
3). Turn on your mixer first, then the active speaker cabinets.
4). Turn up the volume control of the active speaker cabinets.
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 active speaker cabinets first, then the mixer.
Tripod
Mount
Power Cord
Signal Cable
Main Mix
Output
Left
Mixer
Signal Cable
Right
Main Mix
Output
Power Cord
Tripod
Mount
3
HOOK
4. HOOK-UP DIAGRAMS
UP
4.1 Two speakers in stereo operation
MAIN OUT L
MAIN OUT R
LINE IN
VOLUME
+4dBu
PS 4LA
SIGNAL
LINKINPUT
LIMIT
ACTIVE SPEAKER CABINET
BAL
BI-AMP. POWER AMPLIFIER
SHIELD
MIXER
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
POWER
SERIAL
Use only with a 250V fuse
HOOK
UP
4.2 Multiple speakers with the same stereo source
MIXER
LINE IN
SIGNAL
LINKINPUT
LIMIT
BAL
MAIN OUT LEFT
LINK
VOLUME
+4dBu
PS 4LA
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
SHIELD
LINE IN
LINKINPUT
BAL
LINK TO NEXT SPEAKER
VOLUME
+4dBu
PS 4LA
SIGNAL
LIMIT
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
SHIELD
MAIN OUT RIGHT
LINE IN
BAL
LINKINPUT
LINE IN
VOLUME
SIGNAL
LINKINPUT
LIMIT
BAL
SHIELD
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
SERIAL
Use only with a 250V fuse
LINK
LINE IN
VOLUME
+4dBu
PS 4LA
SIGNAL
LIMIT
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
SHIELD
+4dBu
PS 4LA
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
POWER
LINK TO NEXT SPEAKER
VOLUME
+4dBu
PS 4LA
SIGNAL
LINKINPUT
LIMIT
ACTIVE SPEAKER CABINET
BAL
BI-AMP. POWER AMPLIFIER
SHIELD
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
SERIAL
Use only with a 250V fuse
POWER
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
SERIAL
Use only with a 250V fuse
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
POWER
MODEL
SERIAL
Use only with a 250V fuse
POWER
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
SERIAL
Use only with a 250V fuse
POWER
4
HOOK
4. HOOK-UP DIAGRAMS
UP
4.3 Two subwoofers and two satellite speakers
LINE IN
SIGNAL
LINKINPUT
LIMIT
BAL
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
MODEL
SERIAL
Use only with a 250V fuse
ACTIVE SUBWOOFER
5. RIGGING
VOLUME
+4dBu
PS 4LA
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
SHIELD
POWER
MAIN OUT LEFT
LINE IN LEFT/MONO
MIXER
MAIN OUT RIGHT
LINE IN LEFT/MONO
SIGNAL
LINKINPUT
LIMIT
BAL
LINE IN
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
Use only with a 250V fuse
ACTIVE SUBWOOFER
VOLUME
+4dBu
PS 4LA
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
SHIELD
MODEL
POWER
SERIAL
The PS4L / 4LA speaker cabinet
also provides the suspension points for
fixed installation. How to use them?
First, open the dust covers, and the
next, mount the flying rings to the
suspension points
(M10 1.5PH LENGTH: 30mm).For
further details, please refer to the
right illustration.
Eyebolt
Dust Cover
Suspension
Point
5
SPOT
LI
GHT
6. PANEL DESCRIPTION-PS 4LA
-. CONNECTION PLATE
(1) BI-POLAR MAIN POWER SWITCH
(2) AC POWER SOCKET WITH MAIN FUSE
(3) GROUND SWITCH
(4) CLIP INDICATOR RED LED
(5) LINK OUT ON XLR CONNECTOR
(6) a. STEREO JACK INPUT
b. LINE INPUT ON XLR CONNECTOR
(7) MAIN VOLUME CONTROL
(5)(6) (7)(4)
VOLUME
+4dBu
PS 4LA
SIGNAL
LINKINPUT
LIMIT
SHIELD
MODEL
SERIAL
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
POWER
BAL
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
Use only with a 250V fuse
(3)
(5)(6) (7)(4)
VOLUME
3
2 1
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
220-240V 50/60Hz
Use only with a 250V fuse
+4dBu
PS 4LA
SIGNAL
LINKINPUT
LIMIT
SHIELD
MODEL
SERIAL
ACTIVE SPEAKER CABINET
BI-AMP. POWER AMPLIFIER
POWER
BAL
(3)
(1)(2)
(a)
(1)(2)
(b)
6
SP
OT
LIG
HT
7. PANEL DESCRIPTION-PS 4L
-. CONNECTION PLATE
(1) INPUT
Receive the power coming from an external power
amplifier. (SPK +1/-1 connected; +2/-2 not connected)
(2) THRU
Direct LINK for connect in parallel a second speaker
cabinet. (SPK +1/-1 connected; +2/-2 not connected)
Besides, the passive crossover included the
electronic protection on the driver.
PS 4L
SOUND REINFORCEMENT SPEAKER SYSTEM
POWER HANDLING:
AES - 200 Watts
PEAK - 400 Watts
IMPEDANCE:
8 ohms nominal
MODEL
SERIAL
DESIGNED AND DEVELOPMENT IN ITALY
INPUT THRU
LINK
(1) (2)
7
8. TECHNICAL SPECIFICATION
Model Item
System type
Continuos Power
Peak Power Rating
Sensitivity at 1W, 1mt
Max SPL at 1mt
Frequency Response
Impedance
Crossover Frequency
Lower - Frequency
High - Frequency
High Frequency Protection
Dimensions H W D
Net Weight /kg lbs
Gross Weight lbs/kg
Shipping Volume
Model Item
Powered System type
LOW Output Power
HIGH Output Power
Max SPL at 1m
Frequency Response
Impedance Low - High
Crossover Frequency
Protection Low - High
Low - Frequency
High - Frequency
Horn Coverage H V
Input Sensitivity
Input Impedance
Connectors
Plastic Reinforced Cabinet
Hardware Suspension
Amplifier Protections
External Control
Power Supply
Dimensions H W D
Net Weight /kg lbs
Gross Weight lbs/kg
Shipping Volume
PS 4L
2 - way vented box
180 Watt AES Standard
360 Watt Peak
96dB SPL
119dB SPL
60Hz / 20kHz +/- 10dB
8 Ohm Nominal
2450Hz 12dB/Oct
12" / 318mm - 2" Voice Coil
1" Compression Driver 1" Voice Coil
Electronic Dynamic Protection
660mm 396mm 384mm
17.1kg / 37.7lbs
19.82kg / 43.69lbs
4.83CFT
PS 4LA
Bi-Amp. With analog processor
108W (RMS) / 141W (EIAJ)
45W (RMS) / 56.3W(EIAJ)
119dB SPL
55Hz / 20kHz +/- 10dB
Low 8 Ohm - High 8 Ohm
Complex EQ processor
Limiter / Compressor plus PTC
12" / 318mm - 2" voice coil
1"Compression Driver -
1" Voice Coil
90 H 45 V
Line + 4dB / 1.23V
30k Ohms Balanced 15k Ohms Unbalanced
Input with Jack / Link with XLR
Trapezoidal & Monitor shape
SIX suspension points
Soft Start - Short Circuit DC voltage - Thermal Protection
Volume - Clip - Ground Switch
230Volt / 115Volt 50 /60Hz
660mm 396mm 384mm
(26" 15.6" 15.1")
19.40kg / 42.81lbs
22.05kg / 48.61lbs
4.83CFT
(26" 15.6" 15.1")
8
9. 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
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
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.
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.
LT O
LT O
LT O
9
NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
SEIKAKU TECHNICAL GROUP LIMITED
www.altoproaudio.com Tel: 886-4-22313737
email: info@altoproaudio.com Fax: 886-4-22346757
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 2008 Seikaku Group
c
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