LTO
PBM4 SISTEMA
PORTABLE PA SYSTEM
R
User's Manual
www.altoproaudio.com
Version 2.0 SEP. 2007
English
IMPORTANT SAFETY INSTRUCTION
CAUTION
RISK OFELECTRIC SHOCK
DO NOTOPEN
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 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.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
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 water and
moisture.
5.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
6.
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
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 could
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
notbeplacedinmunicipalwaste
and should be separate collection.
MovethisEquipmentonlywithacart,
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 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.
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. FEATURES.......................................................................................1
3. QUICK START..................................................................................4
4. CONTROL ELEMENTS......................................................................5
5. INSTALLATION & CONNECTION........................................................8
6. BLOCK DIAGRAM..........................................................................10
7. TECHNICAL
SPECIFICATIONS...........................................................11
8. WARRANTY..................................................................................12
1. INTRODUCTION
Thank you for purchasing the amazing portable PA system PBM4 SISTEMA.
This system is small enough to fit into any airplane's overhead storage
compartment yet being flexible and powerful enough to be used for small gigs
and professional multimedia presentations. PBM4 SISTEMA includes a 45+45
watt stereo amplifier, a 5-channel mixer, and 2x5" full range speakers. The chassis
is made by moulded polypropylene for shock and moisture protection.
Your PBM4 SISTEMA is the ideal tool for: Multimedia Presentations, Weddings,
Small Church Functions, Gym, Music Rehearsal, Small Gigs, School Functions,
and more .
Enjoy your PBM4 SISTEMA and make sure to read this Manual carefully before
operation!
2. FEATURES
Compact moulded polypropylene case
Modern design & Lightweight
2x5" full range speakers
3-band equalizer on input channels
5 Input channels with individual Volume control and 2 bands EQ
3 bands Master EQ
3 XLR microphone Inputs with phantom power(+15V)
2 RCA Line Inputs
2 RCA Line Outputs
Monitor/Headphone output
Monitor/Headphone level control
2 powered output (45+45 watt) for optional external speakers
1
SPOTLIGHT
12KHz
LOW
80Hz
-15dB
MIC IN (bal.)
CH 1
MIC IN (bal.)
CH 2
MIC IN (bal.)
CH 3
CH 4
OUT
LINE IN
(bal.)
LINE IN
(bal.)
LINE IN
(bal.)
3
3
3
TAPE
L
O
+15dB
W
N
O
I
S
12
E
P
-
R
E
LEVEL
A
M
8
P
+10dB
LOW
80Hz
-15dB
L
O
+15dB
W
N
O
I
S
12
E
P
-
R
E
LEVEL
A
M
8
P
+10dB
LOW
80Hz
-15dB
L
O
+15dB
W
N
O
I
S
12
E
P
-
R
E
LEVEL
A
M
8
P
+10dB
LOW
80Hz
-15dB
+15dB
-
LEVEL
8
+10dB
IN
MONITOR OUT
MAIN POWER OUT
-15dB
0
+15dB
0
-15dB
0
+15dB
0
-15dB
0
+15dB
0
-15dB
0
+15dB
0
12KHz
12KHz
12KHz
HIGH
HIGH
HIGH
HIGH
0
0
0
0
-15dB
+15dB
-15dB
+15dB
-15dB
+15dB
-
LEVEL
8
+10dB
-
+10dB
PBM4
LTO
SISTEMA
R
BASS
0
MIDDLE
0
HIGH
0
MAIN
dB
0
-10
-30
10
0
PHANTOM
MONITOR
0
OPERATING
8
ON
OFF
2
3. QUICK START
ThisisthefastestwaytogetsomethingoutfromyourPBM4SISTEMA,ifyouhave
akeyboardandamicrophone.
a. Well, there is not really much to say before starting to operate the PBM4 SISTEMA.
It includes Mixer, Amplifiers and Speakers, so just put it on a clean table first and
make sure that the Power switch on the back panel is on OFF position.
b. Turn down the Input Channel Gain Controls and the MAIN and MONITOR controls.
c. Keep Input Channel EQ and Master EQ controls in center position.
d. Only at this point you can connect the AC cable into an AC socket and you can
switch the system ON.
e. Now connect a microphone into Channel 1-3 or a Line Instrument into Channel 4.
f. Slowly turn up the Input Channel LEVEL Control and then the MAIN Control.
g. For an optimal sound reproduction make sure that the -10 and 0 LEDs on the
Master LED Meter are blinking.
Here you are. It is your first gig with your PBM4 SISTEMA..
3
HOOK
UP
MULTIMEDIA PRESENTATION
0
0
0
L
MICIN (bal )
15dB
+15dB
N
O
W
O
3
1 dB
000
8
LEVEL
I
E
P
R
E
A
M
P
12
MA N
0
0
dB
8
+15dB
10dB
LEVEL
HIGH
12KHz
5dB
LOW
80Hz
+10dB
5dB
b l )
LNE
BASS
LTO
PBM4
SISTEMA
0
MIC1MIC2
HGH
12KHz
LOW
8 Hz
+ 5dB
15dB
00
15dB
+ 5dB
N
W
O
L
3
MC N bal )
0 0
HIGH
2KHz
15dB
LOW
80Hz 80Hz
8
+ 0dB
15dB 15dB
LEVEL
O
S
E
L
P
E
A
M
P
12
bal)
LNE IN
MICIN (ba )
CH 1 CH 2 CH 3 CH 4
0
+1 dB
15dB
15dB
HIGH
1 KHz
+1 dB
15dB
00
LOW
8
+1 dB
+1 dB +15dB
LEVEL
N
O
W
S
O
E
P
R
E
A
M
P
12
3
( al )
LNE N
MDDLE HIGH
OPERATNG
MON TOR
10
0
0
10
PHANTOM
30
OFFON
8
+10dB
+15dB
MAIN POWER OUT
8
+10dB
+15dB
LEVEL
MONITOROUT
IN
TAPE
OUT
Headphone
Wireless MIC System
Laptop Computer
Tape Recorder
iPOD ,CD Player. MP3
This will be typical setting for a Business Presentation making use of PowerPoint slides
and background music/effects generated by CD player, iPOD or other sources such as
Mp3 Players. The Presenter has up to 2 microphones available and a wireless microphone
can also be connected for the use of the audience. The entire presentation can be
recorder via Tape or DAT Recorder.
HOOK
UP
MIC
Gu tar
SMALL GIG WITH EXTERNAL SPEAKERS
Passive Speakers
BASS
LTO
PBM4
SISTEMA
HGH
2KHz
15dB
LOW
80Hz
15dB
0
+ 5dB
00
+ 5dB
N
W
O
L
3
MC N(b l)
0 0
HIGH
1 KHz
15dB
LOW
80Hz 80Hz
8
+1 dB
15dB 5dB
LEVEL
O
S
E
L
P
R
E
A
M
P
12
( al )
LNE IN
MICIN (ba )
CH 1 CH 2 CH 3 CH 4
Keyboard
MDDLE HGH
0
+15 B
15dB
15dB
HIGH
12KHz
+1 dB
5dB
00
LOW
8
+10dB
+1 dB +15dB
LEVEL
N
O
W
S
O
E
P
R
E
A
M
P
12
3
(b l )
LNE
0
15dB
0
+15dB
0
LEVEL
O
W
I
O
E
L
P
R
E
12
3
MICIN (bal )
Drum Machine
0
+15dB
15 B
000
8
+10dB
M
P
ba )
LIN
MAIN
0
B
8
LEVEL
HGH
12KHz
1 dB
LOW
80Hz
1 dB
OPERATNG
MON TOR
10
0
0
0
PHANTOM
0
OFFON
8
+10dB
+ 0dB
+15dB
MAIN POWER OUT
8
+10dB
+15dB
LEVEL
MONITOROUT
IN
TAPE
OUT
Powered Stage Monitor
DAT Recorder
In this case up to three Musicians (Vocalist, Guitar Player and Keyboard Player) can
hookup to the PBM4 SISTEMA and an additional Drum Machine can also be connected
to the Stereo Channel. Two external passive speakers can be connected (the internal
speakers will be automatically be disconnected) as well as a powered stage Monitor.
4
SPOTLIGHT
4. CONTROL ELEMENTS
1 THE MONO INPUT CHANNELS
These are marked CH1 to CH3 and include a
balanced XLR socket (MIC IN) and a balanced
1/4" socket (LINE IN). Use the XLR socket to
connect a low impedance balanced dynamic
microphone or a low level signal. You can also
connect a Condenser microphone into the XLR
socket (See following about Phantom Power).
Use the LINE IN socket to connect a Line Level
Instrument such as a keyboard or a drum machine.
You can also connect an electric guitar or bass
through an option DI Box (Direct Injection Box)
2 PHANTOM POWER SWITCH
0
HIGH
12KHz
15dB
00
LOW
80Hz
15dB
L
MIC IN (bal.)
O
+15dB
+15dB
W
N
3
O
I
S
E
P
R
12
CH 1
8
LEVEL
E
A
M
P
+10dB
LINE IN
When the (2) switch is at ON position, a +15V
phantom power will be applied to CH1 through
CH3. Only Condenser microphones need Phantom
Power, so switch it OFF when you use dynamic
microphones.
PHANTOM
3 TAPE IN
OFFON
Here you can connect a stereo Line Level via RCA
sockets. Usually this stereo channel will be used to
connect into the PBM4 SISTEMA with the audio output
of a Computer, or a CD Player, iPOD, MP3 player, etc.
4 TAPE OUT
Via these two RCA sockets you can route out the
Main Stereo signal usually to a Tape Recorder or
DAT Recorder.
LEVEL
TAPE
OUT
CH 4
5 LEVEL CONTROL
It adjusts the LEVEL of individual channels with a range from to +10dB.
6
5
(bal.)
1
2
IN
3
4
6 CHANNEL EQ
Each Input channel has its own 2 bands equalizer with an adjustable range of
+/-15 dB. The HIGH control creates a shelving filter that will boost/cut all
frequencies above 12 kHz. You can use it to eliminate high frequency noise and
hiss (such as those produced by Tape Recorders) or to boost and make crispier
the cymbals or certain harmonics of the human voice. The LOW control will
create a shelving filter that will boost/cut frequencies below 80 Hz. Use the
LOW control to put in evidence Kick Drum or enhance male voice.
5
SPOTLIGHT
4. CONTROL ELEMENTS
THREE BANDS MASTER EQ
This equalization circuit is inserted before the MAIN level control. You have available
3 controls: BASS, MIDDLE and HIGH.
7HIGH
Use it as a further boost to the overall MIX
togetmorecolourfromyourprogramor
turn the control down if you want to avoid
high frequency noise.
8 MIDDLE
98
7
This is a unique control designed for a wide variation of middle frequencies. Turn
the control down (from center position) and you will make the human voice more
warm and smooth while turning the control up will enhance vocal intelligibility. Be
careful not to boost these frequencies too much to avoid feedback on microphone
inputs.
9LOW
Turn the control down (from center position) if you experience rumble or low
frequency noise or turn it up to make the PBM4 SISTEMA sound much bigger
than what it is.
10 MONITOR OUT
Connect a powered Monitor to this socket or
an external Amplifier + Monitor Speaker. You
can also use it to connect a pair of Headphones.
11 MAIN POWER OUT
You can connect a pair of passive speakers to
these Output sockets. In this case, the internal
speakers will be disconnected and the 45W x 2
internal amplifier signal will be assigned to these
sockets.
6
11
MAIN POWER OUT
MONITOR OUT
10
SPOTLIGHT
4. CONTROL ELEMENTS
12 MAIN
There is the Main Mix Control adjusting the overall volume assigned to the 2
internal speakers or to the MAIN POWER OUT speakers.
13 MAIN LED METER
This 4 segments LED Meter will monitor the volume assigned by the MAIN level
control. If the +10 LED flashes, you have reached the limit of the internal
45+45W amplifier and the outgoing signal is approaching distortion. +10 LED
should flash only occasionally. If no LED is blinking, it means that the output
level is too low, so either you do not hear any music or the signal is too low to
the noise level. For optimal functioning LEDs marked -10 and 0 should always
be blinking.
14 MONITOR
Via this Control, you can adjust the signal
Level applied to the MONITOR OUT sockets.
15 OPERATING
This LED will blink when your PBM4 SISTEMA
is switched ON.
REAR PANEL
12
13
14
15
16 POWER ON/OFF
This switch is used to turn the main power ON/OFF.
17 AC INLET
Use it to connect your PBM4 to the main AC with the supplied AC cord. Please
check the voltage available in your country and how the voltage for your PBM4
SISTEMA is configured before attempting to connect your PBM4 SISTEMA to
the main AC.
ONPOWER
OFF
16
FUSE 2A
AC~230V
50/60Hz
17
2
7
5. INSTALLATION AND CONNECTION
Ok, you have got to this point and you are now in the position to successfully operate
your PBM4 SISTEMA. However, we advise you to read carefully the following section to
be the real master of your own mix. Not paying enough attention 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:
1. Turn down all Input and output gain controls.
2. Connect phantom powered microphones before switching on the +15Volt phantom
power switch.
3. Set the output level of your PBM4 SISTEMA or the connected power amplifier at
no more than 75%.
4.Now,settheMONITORlevelatnomorethan50%.Inthiswayyouwillbeableto
hear later what you are doing connecting a pair of headphones or a pair of powered
studio monitor speakers.
5. Position EQ controls on middle position.
6. Increase the input gain properly for maintaining the good headroom and ideal dynamic
range.
7. Depending on the actual application, turn slowly the input and output level controls
for obtaining the maximum gain before distortion.
8. Now repeat the same sequence for all input channels. The main LED meter could
move up into the red section. In this case you can adjust the overall output level
through the MAIN MIX control.
Audio Connections
You can connect unbalanced equipment to balanced inputs and outputs. Simply follow
these schematics.
Tip
Sleeve
Ring
Strain Clamp
Use for Headphone
1/4" Stereo (TRS) Jack Plug
T p
Sleeve
Strain Clamp
Use for Mono Line In Mono 1/4"Jack Plugs
1/4" Mono (TS) Jack Plug
8
Ring Right Signal
Tip Left Signal
Sleeve Ground/Screen
T p Signal
Sleeve Ground/Screen
5. INSTALLATION AND CONNECTION
Sleeve
Strain Clamp
1/4" Stereo (TRS) Jack Plug
2
2 Hot(+)
Use for Balanced Mic Inputs
(For unbalanced use, connect pin 1 to 3)
3
3 Cold(-)
1
1 Ground/Screen
3 pin XLR Male Plug
(seen from soldering side)
Tip
Ring
Use for Insert Points
Ring Return Signal
Sleeve Ground/Screen
2 Hot(+)
(For unbalanced use, leave pin3 unconnected)
2
3 Cold(-)
Use for Main output
3 pin XLR Line Socket
(seen from soldering side)
Tip Send Signal
1
1 Ground/Screen
3
MAIN SPEAKERS CONNECTION
Please use only the power connectors to make connections with other signal
source equipment for the passive speaker cabinets. The power connector has
four terminals: 1+, 1-, 2+, 2-.
1+
2-
2+
Speakon connector
1-
9
6. BLOCK DIAGRAM
8
7654321
TAPE OUT
2-TRACK
TAPE IN
B
MONITOR OUT
D
C
OUTPUT
1
S
2
TRS
POWER AMPLIFIER
ALTO PBM4 SISTEMA
MAIN BUSMAIN BUS
)
4POINT
(
[-10dB]
HA
LEVEL
MAIN LEVEL
LEVEL
HI
MID
LOW
3-BAND EQ
MAIN BUS
[0dB]
2TK IN
MAIN BUS
A
TRS
MONTOR LEVEL
10
2-STAGE EQ
LOW HI
[10dB]
ON
OFF
213
+15V
PHANTOM
LOW-Z
[-40/-20dB]
D
HI-Z
[-30/-10dB]
(CH1-3)
CH INPUT
1 2 3 4 5 6 78
C
B
A
7. TECHNICAL SPECIFICATION
Input channels
Microphone Input
Frequency response
Distortion(THD&N)
Gain
SNR(Signal to Noise Ratio)
Line input
Frequency response
Distortion(THD&N)
Gain
Impedances
Microphone Input
Channel Insert return 2.5 kOhm
All other inputs
Tape out
All other outputs
Equalization
Hi shelving
Low shelving
Main Mix Section
Noise(Bus noise)
Monitor max out
Amplifier Section
Output Power 45W x 2 RMS (Nominal power) 66W x 2(EIAJ)
Frequency Response
Output Impedance
Power supply
Main voltage
Power Consumption
Fuse
Physical
Dimension
Net Weight
Gross Weight
Electronically balanced, discrete input configuration
10 Hz to 55 kHz, +/ 3 dB
0.05% at +4 dBu, 1 kHz
30 dB
>94 dB
Electronically balanced
10 Hz to 55 kHz, +/ 3 dB
0.05% at +4 dBu, 1 kHz
10 dB
1.4 kOhm
10 kOhm or greater
1 kOhm
120 Ohm
+/ 15 dB@12 kHz
+/ 15 dB@80 Hz
Fader 0 dB, channels muted: 85 dBr (ref.: +4 dBu)
Fader 0 dB, all input channels assigned and set to
UNITY gain: 81 dBr(ref.: +4 dBu)
+22 dBu unbalanced, 1/4"jacks
25 Hz 20 kHz
8 ohm
USA/Canada 100 120V~, 60 Hz
Europe 210 240V~, 50 Hz
U.K./Australia 240V~, 50Hz
133 watts
100 120V~: T4A
21 0 240V~: T2A
318x194x160 mm(LxWxH)(12.5"x7.6"x6.3")
6.23 Kg
8.0 Kg
11
8. 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
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
12
NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
SEIKAKU TECHNICAL GROUP LIMITED
http://www.altoproaudio.com Tel: 886-4-22313737
email: alto@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 2007 Seikaku Group
c
NF -1.102337
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