Page 1
OWNER'S MANUAL
MS8/MS8A/MS12S/MS12SA
SPEAKER ENCLOSURE
ACTIVE MODELSPASSIVE/
www.altoproaudio.com
Version 1.1 Apr 2009
English
Page 2
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.
SPL
EXAMPLE
Small gig
90
train
92
Subway train
95
High level desktop monitors
97
Classic music concert
100
102
105
110
115
Rock concert
Page 3
IN THIS MANUAL:
1. INTRODUCTION
2. SPEAKER CABINET QUICK START
3. HOOKUP DIAGRAMS
4. WIRE CONNECTIONS
5. RIGGING
6. FREQUENCY RESPONSE
7. PANEL DESCRIPTION- A/MS12SAMS8
8. PANEL DESCRIPTION-MS8/MS12S
9. TECHNICAL SPECIFICATION
10. WARRANTY
1
2
4
6
7
9
11
13
14
16
1. INTRODUCTION
Thank you very much for expressing your confidence in LTO products by purchasing MS8/MS8A/MS12S/MS12SA speaker system. The MS series cabinets
are specifically designed for using in hi-quality performance site and the precise
sound reinforcement commercial place. uses trapezium configuration which
greatly decreases the resonance of the standing wave in the cabinet. These
cabinets uses hi-density matrix spray-paint technics and the bottom bracket
design which make mounting quickly and Flexibly. The HF compression driver and
vented LF for fully professional performance.
The MS8A/MS12SA speaker cabinets include some exclusive innovations such as
switch mode power supply and digital power circuitry (in selected modes) that
make them the lightest powered cabinets of this kind ever made.
The MS full range models include another Alto innovation: The MODELLER.
Thanks to this circuitry, User can select 16 different tastes and applications.
The 16 kinds of sound presets especially thought for application with or without
subwoofer, for voice optimised application, for Disco Music, for jazz, for Rock &
Roll among others.
Enjoy your MS8/MS8A/MS12S/MS12SA speaker cabinet and make sure to read
this manual carefully before operation.
1
Page 4
SPOTLIGHT
2. SPEAKER CABINET QUICK START
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.
Speaker Cable
MS8 MS8
Stereo
Power Amplifier
Tripod
Mount
Left
Main Mix
Output
Speaker Cable
Mixer
D1
Right
Main Mix
Output
Tripod
Mount
2
Page 5
SPOTLIGHT
2. SPEAKER CABINET QUICK START
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.
Signal Cable
MS8A MS8A
Power Cord
Tripod
Mount
Left
Main Mix
Output
Mixer
Signal Cable
Right
Main Mix
Output
Power Cord
Tripod
Mount
3
Page 6
HOOK
3.HOOKUP DIAGRAMS
UP
Two active speaker in stereo operation
LINE IN LINE IN
MAIN OUT L MAIN OUT R
MS8A MS8A
MIXER
Tripod
Mount
Multiple active speakers with the same stereo source
MIXER
MAIN OUT LEFT MAIN OUT RIGHT
LINE IN
LINK LINK
LINE IN LINE IN
LINK TO NEXT SPEAKER LINK TO NEXT SPEAKER
Tripod
Mount
MS8A MS8A
Tripod
Mount
Trpod
Mount
Tripod
Mount
Tripod
Mount
4
Page 7
HOOK
3.HOOKUP DIAGRAMS
UP
Two active subwoofers and two active satellite speakers
LINE IN LINE IN
MS8A MS8A
MS12SA
Tripod
Mount
MAIN OUT LEFT
LINE IN LEFT/MONO
MAIN OUT RIGHT
LINE IN LEFT/MONO
MIXER
MS12SA
Tripod
Mount
One active subwoofers and two active satellite speakers
MS8A MS8A
MS12SA
Tripod
Mount
LINE IN LEFT/MONO
MAIN OUT LEFT MAIN OUT RIGHT
LINE IN RIGHT
LINE INLINE IN
Tripod
Mount
MIXER
5
Page 8
4 WIRE CONNECTIONS.
-.For Active Speaker Cabinets
As to these circumstances,audio connections is mostly intended for the signal
flow,so,determine the wire configuration according to your real application
system and its connecting facility.Normally,you have the following choices:
-.For Passive Speaker Cabinets
Please use the power connectors to make connections with other signal source
only
equipment for the passive speaker cabinets. The power connector has four terminals:
1+, 1-, 2+, 2-.
1+
2-
1-
2+
In our cabinets, only 1+/1- are used to connect the Speaker+/Speaker-, and 2+/2are not used.
6
Page 9
5. RIGGING
The MS8/MS8A speaker cabinet also provides the bracket for fixed installation,
How to use them?
1).Inventory
Before beginning installation, inventory kit to items listed.
Item Q'ty Description
I 1PCS Bracket / Wallmount
II 2PCS Screw, M10*30*1.5PH, Black ( in the cabinet)
III 2PCS Washer, Neoprene, 1.5t 35mm
MH-8B
Warning:
Installation should only be done by an experienced technician. Improper
installation may cause serious injury . The surface where the bracket/cabinet
is to be fastened must have enough structural integrity .
2).Mounting the Bracket
Due to various construction methods and materials used today, the hardware
for securing the bracket to the mounting surface is not supplied. It is recommended that you consult a building professional for the proper mounting
hardware before mounting the bracket.
3).Removing the Shipping Hardware, Remove the flat head screws from the top
and the bottom of the cabinet using a 5mm wrench.
7
Page 10
5. RIGGING
Choosing which slot to use there are three slots in each bracket arm. use
4).
the forward slot (as shown)when the cabinet is facing perpendicular to the
bracket mounting surface.
5).Hanging the Cabinet
Place a neoprene gasket on the bracket's lower arm. Center it on the
A.
appropriate slot.
Position the cabinet between the bracket arms.
B.
Align the bracket's top slot to the cabinet's M10 threaded hole.
C.
Holding the cabinet in position, insert the screw through the bracket slot
D.
and into the cabinet's top threaded hole and hand tighten.
Repeat step D through the bottom bracket hole.
E.
Position cabinet and tighten both screws with a 5mm wrench.
F.
8
Page 11
6. FREQUENCY RESPONSE
+110
+100
d
B
S
P
L
+90
+80
+70
MS8A
+60
5030
100
200
500
Hz
1k
2k
5k
10k
20k
MS8
+110
+100
d
B
S
P
L
+90
+80
+70
+60
5020
100
200
500
Hz
1k
2k
5k
10k
20k
9
Page 12
6. FREQUENCY RESPONSE
+110
+100
d
B
+90
MS12SA
S
P
+80
L
+70
+60
20 20k50 100 200 500 1k 2k 5k 10k
Hz
MS12S
+110
+100
d
B
S
P
+90
+80
L
+70
10
+60
20 20k50 100 200 500 1k 2k 5k 10k
Hz
Page 13
SPOTLIGHT
7. PANEL DESCRIPTION-MS8A
ACTIVE FULL RANGE: MS8A
(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) LINE INPUT ON COMBO CONNECTOR
(7) MAIN VOLUME CONTROL
(8) POWER SWITCHUNG BUTTOM
(9) PRESETS SELECTOR
Via this knob, you can select the right effect you wish to perform. There
are total 16 options for you, JAZZ CLUB+SUB, VIRTICAL SUB, STAGE
MONITOR, JAZZ CLUB, CONCERT HALL+SUB, DISCO, VOCAL, ROCK &
ROLL, FLAT, DRUM KICK, ANTIRUMBLE, CONCERT HALL, ARENA+SUB,
LOUDNESS, ROLL+SUB ACOUSTIC.ROCK & and
(5)(6) (7) (9)(4)
INPUT
BA
POWER
1FLAT
2DRUM KICK
3
ANTIRUMBLE
4CONCE T HA L
DESGNED NTALY
AC NPUT
110120V 50/60Hz~
220240V 50/60Hz~
ACFUSE
100120V T63AL
220240V T315AL
POWERCONSUMPTION 350W
AC
INPUT
LNK
5ARENA SUB
6LOUDNE S
7ROCK O L+SUB&
8ACOUST C
MO EL
se n y w ha 2 0V u e
8910
7
11
6
12
5
13
0dB
4
4
MAX
9JAZZ CLUB SUB
10VI TUAL SUB
11STAGE MON TOR
12JAZZ CLUB
2
1
PRESETS
13CO CERT HALL SUB
14D SCO
15VO AL
16RO K ROLL&
5
16
(3)
-
8
VOLUME
SGNAL
LMIT
MS8A
S RI L
ON
100-120V
220-240V
OFF
(1)(8)(2)
11
Page 14
SPOTLIGHT
7. PANEL DESCRIPTION-MS12SA
ACTIVE SUBWOOFERS: MS12SA
(11)(10)(9) (12)
(13)
(6)
(7)
(8)
LEFT / MONO
LEFT
0dB
-
MAX
8
LEFT / MONO
BYPASS
HPF 80Hz
R GHT
OUT
POWER
RIGHT
RIGHT
S GNAL
LIM T
VOLUME
PHASEGND
NORMAL
REVERSE
N
LINK
110120V 220240V
AC INPUT
110-120V 50/60Hz
220-240V 50/60Hz
AC FUSE
110 120V T6 3AL
220 240V T3 15AL
POWER CONSUMPTION 350W
ON OFF
U e on y w th a 250V fuse
AC INPUT
POWER
MS12SA
SER AL
MODEL
DESIGNED IN TALY
ON-OFF main power switch
Input AC power socket with main fuse
(3)
POWER, Green LED, indicate ON status
BYPASS Switch Select the Hiqh pass filter or by pass
(4)
(5)
Ground Lift Switch
LINE IN RIGHT.ON XLR CONNECTOR
(6)
LINE IN LEFT/MONO ON COMBO CONNECTOR
(7)
LINK LEFT/RIGHT ON XLR CONNECTOR
(8)
(9)
SIGNAL/LIMIT, Red LED, indicate ON status
(10)
VOLUME main power amplifier control
(11) PHASE Switch Reverse the Polarity of the subwoofer output
(12) OUT LEFT/RIGHT ON 2xXLR CONNECTOR
(13) POWER SWITCHUNG BUTTOM
12
(3)
(4)
(5)
Page 15
SPOTLIGHT
8. PANEL DESCRIPTION-MS8/MS12S
CONNECTION PLATE
PASSIVE FULL RANGE: MS8
(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.
MS8
SOUND REINFORCEMENT SPEAKER SYSTEM
POWER HANDLING
CONTINUOUS 150 Watts
PEAK 300 Watts
IMPEDANCE:
8Ohm
MODE
SER A
DESIGNED AND DEVELOPMENT IN ITALY
LINK
THRU
INPUT
(1) (2)
PASSIVE SUBWOOFERS: MS12S
a). Receive the signal coming from an external amplifier.
INPUT:
(SPK +1/-1 connected;+2/-2 not connected).
b). Power output for satellite speaker, under passive crossoverOUTPUT:
filtered at 125Hz (SPK +1/-1 connected; +2/-2 not connected).
SOUND REINFORCEMENT SPEAKER SYSTEM
POWER HANDLING
CONTINUOUS 300 Watts
IMPEDANCE 4 Ohm
Max SPL 120dB at 1mt
MODEL
SERIAL
DESIGNED AND DEVELOPMENT IN ITALY
OUTPUTINPUT
(a) (b)
MS12S
13
Page 16
SPOTLIGHT
9. TECHNICAL SPECIFICATION
MS8A
Active System Type
Power System
Frequency Response
Maximum SPL @ 1m
Coverage (HxV)
Transducer Low
Transducer High
Active Crossover
Input Connector
Input Sensitivity
External Control
Power Supply
Enclosure Construction
Mounting / Suspension
Dimensions (HxWxD)
Net Weight
Shipping Weight
MS8
Passive System Type
Power System
Frequency Response ( 10dB)
Sensitivity (1w @ 1mt)
Impedance:
Maximum SPL @ 1m
Coverage (HxV)
Transducer Low
Transducer High
Passive Crossover
Input Connectors
Enclosure Construction
Mounting / Suspension
Dimensions (HxWxD)
Net Weight
Shipping weight
8" 2 way Active Modelling Loudspeaker
2 way Bi Amp, with MODELLER
350W LOW CLASS D/65W HIGH
200W LOW CLASS D/35W HI CLASS AB in Continuous
MODELLER presets setting
120dB Continuous/123dB Peak (Calculated)
70 x 70 nominal
8" Woofer, 1.5"voice coil, with double ventilation
1" Neodymium on Spherical Horn (Tractrix contour)
2KHz under analog processor
LINE COMBO/ LINK XLR F Balanced (15kohm)
Line +0dB
MODELLER with 16 Preset / Volume Control/ Power ON with
Green LED/ Clip Limiter with Red LED/ Ground Lift.
120 240 Volt, in Switching Power mode.
MDF wood cabinet, glued and reinforced, black painted, one metal
handle and rubber foot.
Two point for suspension, one metal pole mount, optional bracket.
493 x 304 x 293 mm (19.41" x 11.97 x 11.54")
12.06kg / 26.53 lbs
14.56kg / 32.03 lbs
8" 2 way Passive Speaker Cabinet
2 way Passive
150W continuous / 300W peak
67Hz 18kHz
94.5dB SPL
8 (nominal)
116dB continuous/119dB peak (Calculated)
70 x 70 nominal
8" Woofer, 1.5"voice coil, with double ventilation
1" Neodymium on Spherical Horn (Tractrix contour)
2.25kHz at 12dB/oct, with HF protection
Two Parallel SPK NL 4 for INPUT/ THRU
MDF wood cabinet, glued and reinforced, black painted;
one metal handle and rubber foot.
Two point for suspension , one standard pole mount plus a
optional bracket.
493 x 304 x 293 mm (19.41" x 11.97 x 11.54")
11.29kg / 24.84 lbs
13.79 kg / 30.34 lbs
CLASS AB in EIAJ
14
Page 17
SPOTLIGHT
9. TECHNICAL SPECIFICATION
MS12SA
Power System
Frequency Response ( 10dB)
Maximum SPL @ 1m
Transducer Low
Active Crossover
Input Connector
Input Level
External Control
Power Supply
Enclosure Construction
Mounting
Dimensions (HxWxD)
Net Weight
Shipping Weight
MS12S
Power System
Frequency Response ( 10dB)
Sensitivity (1w @ 1mt)
Impedance:
Maximum SPL @ 1m
Transducer Low
Passive Crossover
Enclosure Construction
Input Connectors
Mounting
Dimensions (HxWxD)
Net Weight
Shipping weight
12" Active Subwoofer Speaker Cabinets
350W Class D in EIAJ/300W Class D in Continuous
47Hz 125Hz
121dB Continuous/124dB Peak (Calculated)
12" Woofer, 2.5"voice coil, with double ventilation
HPF 80Hz under analog processor
L R Input (Combo/ XLR F) / L R Link (2 XLR M) /
L R Output (2 XLR M) Balanced (15kohm)
L R Input Line 0dBu
Volume Control/ Phase Switch / HPF 80Hz By Pass/ Power
ON with Green LED/ Clip Limiter with Red LED/ Ground Lift.
120 240 Volt, in Switching Power mode.
15mm Plywood cabinet, glued and reinforced, resistant
black paint, metal grille, rubber foot.
One metal standard pole mount plus one metal handle
370x 530 x 480 mm (14.57" x 20.87 x 18.90")
18.6kg / 41.01 lbs
20.8kg / 45.86 lbs
12"Passive Subwoofer Speaker Cabinet
300W continuous
47Hz 160Hz
96dB SPL
4 (nominal)
120dB continuous/123dB peak (Calculated)
12" Woofer, 2.5"voice coil, with double ventilation
125Hz at 6dB/oct
15mm Plywood cabinet, glued and reinforced, resistant
black paint, metal grille, rubber foot.
INPUT SPK NL 4 / OUTPUT SPK NL 4, for Satellite Speaker
One metal standard pole mount plus one metal handle
370x 530 x 480 mm (14.57" x 20.87 x 18.90")
18.10 kg / 39.90 lbs
20.30 kg / 44.8 lbs
15
Page 18
10.WARRANTY
1. WARRANTY REGISTRATION CARD
To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card All the
information presented in this Warranty Registration Card gives the manufacturer a better understanding
effective and efficient after-sales warranty service.
mation carefully and genuinely, miswriting or absence of this card will void your
warranty service.
2. RETURN NOTICE
2.1In
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
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 mat-LT O
erials 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 atLT O
its own option at no charge to you for parts or for labor in accordance with
the right side of this limited warranty.
within 10 days of the Purchase Date.
of the sales status, so as to purport a more
Please fill out all the infor-
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
3.5 In no event shall be liable for any incidental or consequentialdamages.LT O
Some states do not allow the exclu-sion 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.
16
Page 19
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 2009 Seikaku Group
c
NF03258 1.1
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