Alto SR Series User manual

SR Series
User's Manual
LTO
RR
www.altoproaudio.com
Version 1.3 August 2006
EnglishEnglish

1
SAFETY INSTRUCTIONS
1. Read Instructions
All the safety and operation instructions should be read before using the product and retain them for future reference.
2. Water & Moisture
This product should not be used near water and will be protect from atmospheric agents in fixed or temporary installations.
3. Heat
This product should be situated away from heat sources such as radiators, or other devices which produce heat.
4. Liquid Entry
Care should be taken so that liquids are not spilled into the product and that objects do not fall on.
5. Service Assistance
This product should be serviced only by qualified service personnel when :
a. Liquids has spilled or objects have fallen into this product, or
b. This product has been exposed to rain, or
c. This product does not appear to operate normally or exhibits change in performance, or has been dropped or its
cabinet / chassis damaged.
6. Package
The package of this product has been tested, inspect the package before open, if any damage is found, notify to
your dealer.
7. Hearing
This product produce high acoustic levels may cause permanent hearing loss, (SPL in for a defined period of time).
8. Installations
This product should be installed on the floor with a specific stand, according to the max weight, or in suspension
with a five points included in the cabinet (M10 ×1.5PH Length 30mm).
The suspension of more speaker cabinet in a vertical array is NOT advised.
"Electric discharge"
This symbol, alert you to the presence of uninsulated dangerous voltage inside the product enclosure, which constitutes a
risk of electric shock.
"Exclamatory point"
This symbol, alert the user to the presence of important operating and maintenance instructions in the owner's manual
included to the product.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Disposing of this product should not be placed in municipal waste and should be Separate collection.

TABLE OF CONTENT
4. WIRE CONNECTIONS .........................................................................................................................10
2
1. QUICK START - PASSIVE SPEAKER CABINET....................................................................................3
-. For Passive Full-range Speakers
-. For Passive Subwoofer & Satellite Speakers
2. QUICK START - ACTIVE SPEAKER CABINET.....................................................................................5
-. For Active Full-range Speakers
-. For Active Subwoofer & Satellite Speakers
3. CONNECTION PLATE...........................................................................................................................7
-. Passive Full-range Speaker for SR300 / SR400 / SR500
-. Passive Subwoofer Speaker for SR500S
-. Active Full-range Speaker for SR300A / SR400A / SR500A
-. Active Subwoofer Speaker for SR500SA
5. TECHNICAL SPECIFICATIONS ...........................................................................................................11
-. For Passive Speaker Cabinets
-. For Active Speaker Cabinets

1. QUICK START - PASSIVE SPEAKER CABINET
-. For Passive Full-range Speakers
QUICK START
SR Passive Full-range Speakers
3
Stereo
Power Amplifier
Speaker Cable
Tripod
Mount
Mixer
Tripod
Mount
Speaker Cable
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.
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.
4). Turn up the volume controls of your amplifier to about 70%.
3). Turn on your mixer first, then the stereo power amplifier.
2). Complete other connections as illustrated.
6). After using, turn off your stereo power amplifier first, then the mixer.
Left
Main Mix
Output
Right
Main Mix
Output
Make all initial connections with all the equipment powered off, and ensure that all the main volume controls are turned
completely down.

-. For Passive Subwoofer & Satellite Speakers
4
Speaker Cable
pole
Mount
Speaker Cable
pole
Mount
Stereo
Power Amplifier
Left
Main Mix
Output
Right
Main Mix
Output
Mixer
QUICK START
SR Passive Subwoofer & Satellite Speakers
Speaker Cable
Speaker Cable
6). After using, turn off your stereo power amplifier first, then the mixer.
1). Connect one side of 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 subwoofer, with the second speaker cable connect the output of the
subwoofer to the input of satellite.
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.

2. QUICK START - ACTIVE SPEAKER CABINET
-. For Active Full-range Speakers
QUICK START
SR Active Full-range Speakers
5
Signal Cable
Power Cord
Tripod
Mount Main Mix
Left
Output
Mixer
Tripod
Mount
Power Cord
Right
Output
Main Mix
Signal Cable
1). Connect one side of the signal cable to the output left /right (with Stereo-Jack or XLR) of your audio mixer and
the other side to the line input (COMBO) of your active speaker cabinet (with Stereo-Jack or XLR).
2). Connect the power cord to mains.
3). Turn on your mixer first, then the active speaker cabinets.
6). Use PFL function to get the proper input level for the mixer, and adjust the main mix level control to manipulate
the output level.
7). After using, turn off your active speaker cabinets first, then the mixer.
Make all initial connections with all the equipment powered off, and ensure that all the main volume controls are turned
completely down.
4). Turn up the volume control of the active speaker cabinets.
5). The SR400A work with 16 presets, select your favorite between 1 (CONCERT - HALL), to 9 (KARAOKE),
this preset included a +6dB bass boost, except the preset 3 (FLAT), 4 (VOCAL) and 8 (FLOOR MONITOR);
the other presets between 10 (CONCERT H. + SW), to 16 (KARAOKE + SW), work with a natural bass response,
if required from the musical program, or for improve the matching with a subwoofer SR500SA.

-. For Active Subwoofer & Satellite Speakers
6
Tripod
Mount
Tripod
Mount
Left
Main Mix
Output
Right
Main Mix
Output
QUICK START
SR Active Subwoofer & Satellite Speakers
Signal Cable
Signal Cable
Power Cord
2). Connect the power cord to mains.
3). Turn on your mixer first, then the active speaker cabinets.
4). Turn up the volume control fo the active speaker cabinets.
8). After using, turn off your active speaker cabinets first, then the mixer.
1). Connect one side of signal cable to output left/right of your audio mixer (with stereo-Jack or XLR) and the other
side to the left/right input (stereo/mono XLR) of the active subwoofer; with the second signal cable connect the
left/right output of the subwoofer (stereo/mono- XLR) to the line input (COMBO) of the active satellite (with stereo -
Jack or XLR).
7). Use PFL function to get the proper input level for the mixer, and adjust the main mix level control to manipulate the
output level.
5). Select one of the sixteen presets in to SR400A, with encoder knob (example: number 15 - DISCO + SW).
6). The Subwoofer SR500SA work with 16 presets, select the best crossover frequency presets between 1 (80Hz
BOOST 0°) in phase or 2 (80Hz BOOST 180°) out of phase, to 9 (160Hz BOOST 0°) in phase or 10 (160Hz BOOST
180°) out of phase, this preset included a +6dB bass boost; the other presets between 11 (100Hz FLAT 0°) in
phase or 12 (100Hz FLAT 180°) out of phase to 15 (140Hz FLAT 0°) in phase or 16 (140Hz FLAT 180°) out of
phase, work with a Natural Bass response, if required from the musical program.
Select one of the sixteen presets in to SR500SA, with encoder knob (example: number 4 - 100Hz BOOST 180°
out of phase, or the number 6 - 120Hz BOOST 180°) out of phase, for coupling to the preset 15 - DISCO + SW
of the satellite. The selection of phase conditions between 0°in phase or 180°out of phase is always necessary
after the setting of SR500SA in the environment
PRESET
10
11
12
13
14
15
16
CONCERT H. + SW
LIVE + SW
FLAT + SW
JAZZ + SW
ROCK + SW
DISCO + SW
KARAOKE + SW
SR400A SATELLITE PRESET
1-2-3-4
3-4-5-6
11-12-13-14
11-12-13-14
3-4-5-6
3-4-5-6
1-2-3-4
SR500SA SUBWOOFER
80Hz/100Hz BOOST 0°/180°
100Hz/120Hz BOOST 0°/180°
100Hz/120Hz FLAT 0°/180°
100Hz/120Hz FLAT 0°/180°
100Hz/120Hz BOOST 0°/180°
100Hz/120Hz BOOST 0°/180°
80Hz/100Hz BOOST 0°/180°

3. CONNECTION PLATE
- Passive Full-range Speaker for SR300 / SR400 / SR500
7
- Passive Subwoofer Speaker for SR500S
(2) THRU: Direct LINK for connect in parallel a second speaker cabinet (SPK +1/-1 connected; +2/-2 not connected).
(1) INPUT: Receive the power coming from an external power amplifier (SPK +1/-1 connected; +2/-2 not connected).
(1) INPUT: Receive the power coming from an external amplifier (SPK +1/-1 connected;+2/-2 not connected).
(2) OUTPUT: Power output for satellite speaker, under passive crossover filtered at 125Hz (SPK +1/-1 connected;
+2/-2 not connected).
SR400
LTO
R
INPUT THRU
LINK
DESIGNED AND DEVELOPMENT IN ITALY
SOUND REINFORCEMENT SPEAKER SYSTEM
POWER HANDLING:
AES - 250 Watts
PEAK - 500 Watts
IMPEDANCE:
8 ohms nominal
SERIAL
MODEL
(1) (2)
SR500S
LTO
R
INPUT THRU
LINK
DESIGNED AND DEVELOPMENT IN ITALY
SOUND REINFORCEMENT SPEAKER SYSTEM
POWER HANDLING:
AES - 250 Watts
PEAK - 500 Watts
IMPEDANCE:
8 ohms nominal
SERIAL
MODEL
(1) (2)

8
-. Active Full- range Speaker for SR300A / SR400A / SR500A
(1) Bi-polar main power switch
(2) Input AC power socket
(3) Ground switch
(4) POWER, blue LED, indicate ON status
(5) SIGNAL / LIMIT, green/red LED
(6) LINK on XLR connector
(7) LINE / MIC IN on COMBO connector
(8) Main VOLUME control
(9) PRESETS control with 16 presets as follows
(1)(2)
(3)
(4)
(5)(6)(7) (8) (9)
MODEL
SERIAL
AC~230V 50Hz POWER
SHIELD
PL
SIGNAL
LIMIT
BAL
"WARNING" TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.
LINKINPUT
LTO
POWER AMPLIFIER WITH
SR400A
VOLUME
MAX MIN
MIN MAX
L
I
N
E
M
I
C
DSP PROCESSOR
PUSH
1
3
2
NEW TIDE
CONCERT HALL
LIVE
FLAT
VOCAL
JAZZ-CLUB
ROCK
DISCO
FLOOR MONITOR
KARAOKE
CONCERT H. +SW
LIVE+SW
FLAT+SW
JAZZ+SW
ROCK+SW
DISCO+SW
KARAOKE+SW
Preset NO Descriptions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CONCERT HALL
LIVE
FLAT
VOCAL
JAZZ-CLUB
ROCK
DISCO
FLOOR MONITOR
CONCERT H. + SW
LIVE + SW
FLAT + SW
JAZZ + SW
ROCK + SW
DISCO + SW
KARAOKE + SW
KARAOKE

9
-. Active Subwoofer Speaker for SR500SA
(1) Bi-polar main power switch
(2) Input AC power socket
(3) Ground switch
(4) POWER, blue LED, indicate ON status
(5) SIGN / LIMIT, green/red LED
(6) LINK OUT on XLR connector
(7) LINE / MIC IN on XLR connector
(8) Main VOLUME control
(9) PRESETS control with 16 presets as follows
(1)(2)
(3)
(4)(5)
(6)
(7) (8) (9)
PL
SHIELD
VOLUME
+4dB
SIGN/LIMIT
LEFTRIGHT
LINKLINK
INPUTS
BAL +4dB
LTO
SUBWOOFER ACTIVE WITH
SR500SA
DSP PROCESSOR
1
3
2
JT
1
3
2
JT
80Hz BOOST 0
80Hz BOOST 180
100Hz BOOST 0
100Hz BOOST 180
120Hz BOOST 0
120Hz BOOST 180
140Hz BOOST 0
140Hz BOOST 180160Hz BOOST 180
160Hz BOOST 0
100Hz FLAT 0
100Hz FLAT 180
120Hz FLAT 0
120Hz FLAT 180
140Hz FLAT 0
140Hz FLAT 180
Preset NO Descriptions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
80Hz BOOST 0°
80Hz BOOST180°
100Hz BOOST 0°
100Hz BOOST 180°
120Hz BOOST 0°
120Hz BOOST 180°
140Hz BOOST 0°
140Hz BOOST 180°
160Hz BOOST 0°
160Hz BOOST 180°
100Hz FLAT 0°
100Hz FLAT 180°
120Hz FLAT 0°
120Hz FLAT 180°
140Hz FLAT 0°
140Hz FLAT 180°

10
4. WIRE CONNECTIONS
1+
2+
1- 2-
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-.
-. For Active Speaker Cabinets
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Sleeve
Tip
Sleeve
1
2
3
1
2
3
TIP SLEEVE
TIP RING SLEEVE
12
3
21
3
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Ring
Sleeve
1
2
3
1
2
3
1
2
3
Tip
Ring
Sleeve
1
2
3
Tip
Sleeve
1
2
3
TIP RING SLEEVE
TIP RING SLEEVE
TIP SLEEVE
SLEEVE RING TIP
˙Unbalanced
TIP RING SLEEVE
˙Balanced
21
3
1 2
3
1 2
3
1 2
3
1 2
3
SLEEVE TIP
SLEEVE RING TIP
In our cabinets, only 1+/1- are used to connect the Speaker+/Speaker-, and 2+/2- are not used.
-. For Passive 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:

11
5. TECHNICAL SPECIFICATIONS
SR500SA
Descriptions
Active System Type
LOW - RMS Output Power
System Peak Power
Max SPL at 1m
Frequency Response
Impedance Low - High
Crossover Frequency
Protection Low - High
Low Frequency Device
Input Sensitivity
Input Impedance
Connectors
Plywood Cabinet
Hardware Suspension
Amplifier Protections
External Control
Power Supply
Dimensions H W D××
Net Weight lbs/kg
Shipping Volume
Gross Weight lbs/kg
Amp. with DSP processor
233W @8Ohm, 378W @4Ohm Class H
1000Watt Peak
124dB SPL calculated
45Hz / 20kHz at -10dB
Low 4ohm
16 selectable Crossover
DSP Limiter / Compressor
15" / 385mm - 3" voice coil
Line +4dB / 1.23V
30kohm Bal. / 15kohm Unbal.
Input / Output with XLR
18mm Multilayer Plywood
No suspension point
Same to SR400A
Same to SR400A
230Volt / 115Volt 50 / 60Hz
Descriptions
Active System Type
LOW - RMS Output Power
HIGH - RMS Output Power
System Peak Power
Max SPL at 1m
Frequency Response
Impedance Low - High
Crossover Frequency
Protection Low - High
Low Frequency Device
High Frequency Device
Horn Coverage H°× V°
Input Sensitivity
Input Impedance
Connectors
Plywood Cabinet
Hardware Suspension
Amplifier Protections
External Control
Power Supply
Dimensions H W D××
Net Weight lbs/kg
Shipping Volume
Gross Weight lbs/kg
1.35" Compression-driver
90°H ×60°V
Mic / Line +4dB / 1.23V
30kohm Balanced / 15kohm Unbalanced
Input with Combo / Link with XLR
18mm Multilayer Plywood
Five suspension point
Soft Start - Short Circuit - DC voltage - Thermal Protection
Line Volume - Encoder with 16 preset - Clipping LED indicator - Ground Switch
230Volt / 115Volt 50 / 60Hz
645×395×385mm
59.77LBS/27.11Kg
72.88LBS/33.06Kg
6.56CFT
SR500ASR400A
Bi - Amp. With DSP processor
164W @8Ohm, 251W @4Ohm Class H
100Watt RMS Class AB
600Watt Peak
120dB SPL calculated
60Hz / 20kHz at -10dB
Low 4ohm - High 8ohm
2250Hz - DSP Processor
DSP Lim/Comp. each section
10" / 266mm - 2" voice coil
Bi - Amp. With DSP processor
164W @8Ohm, 251W @4Ohm Class AB
800Watt Peak
122dB SPL calculated
55Hz / 20kHz at -10dB
Low 4ohm - High 8ohm
2150Hz - DSP Processor
DSP Lim/Comp. each section
12" / 318mm - 2.5" voice coil
Bi - Amp. With DSP processor
232W @8Ohm, 382W @4Ohm Class H
232W @8Ohm, 382W @4Ohm Class AB
1000Watt Peak
124dB SPL calculated
50Hz / 20kHz at -10dB
Low 4ohm - High 8ohm
2000Hz - DSP Processor
DSP Lim/Comp. each section
15" / 385mm - 3" voice coil
SR300A
598 500 600mm(23.54" 19.69"23.62"mm)×× ×
93.81LBS/42.55Kg
104.65LBS/47.47Kg
14.29CFT
250Watt RMS Class H
50.7Ibs/23.0Kg
5.21CFT
59.08Ibs/26.80Kg
565×346×355mm

12
SR500S
Descriptions
Passive System Type
Continuos Power
Peak Power
Max SPL at 1m
Frequency Response
Impedance
Crossover Frequency
Low Frequency Device
Connectors
Plywood Cabinet
Hardware Suspension
Dimensions H ×W ×D
Net Weight lbs/kg
Gross Weight lbs/kg
Shipping Volume
Direct Radiator / Rear Loaded
400Watt AES Standard
800Watt Peak
123dB SPL calculated
50Hz / 200Hz at -10dB
4ohm
125Hz - 12dB/Oct.
15" / 385mm - 3" long voice coil
2 ×SPK4@ Power Input / Output
18mm Multilayer Plywood
No suspension point
598×500×600mm(23.54")×(19.69")×(23.62)
78.15LBS/35.45Kg
89LBS/40.37Kg
14.29CFT
SR500SR300 SR400
Descriptions
2 - way vented box
250Watt AES Standard
500Watt Peak
119dB SPL calculated
65Hz / 20kHz at -10dB
8ohm
2250 - 12dB/Oct.
Electronic Dynamic Protection
10" / 266mm - 2" voice coil
1.35" Compression-driver
90°H ×60°V
2 ×SPK4 @ Power Input / Output
18mm Multilayer Plywood
Five suspension point
Passive System Type
Continuos Power
Peak Power
Max SPL at 1m
Frequency Response
Impedance
Crossover Frequency
Protection
Low Frequency Device
High Frequency Device
Horn Coverage H°× V°
Connectors
Plywood Cabinet
Hardware Suspension
Dimensions H ×W ×D
Net Weight lbs/kg
Gross Weight lbs/kg
Shipping Volume
2 - way vented box
300Watt AES Standard
600Watt Peak
121dB SPL calculated
60Hz / 20kHz at -10dB
8ohm or 4ohm
2150 - 12dB/Oct.
Electronic Dynamic Protection
12" / 318mm - 2.5" voice coil
2 - way vented box
350Watt AES Standard
700Watt Peak
123dB SPL calculated
55Hz / 20kHz at -10dB
8ohm or 4ohm
2000 - 12dB/Oct.
Electronic Dynamic Protection
15" / 385mm - 3" voice coil
645×395×385mm
46.76Ibs/ 21.21Kg
6.56CFT
560×345×355mm
59.88Ibs/ 27.16Kg
680×455×440mm
1.35" Compression-driver 1.35" Compression-driver

NF01890-1.3
No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
http://www.altoproaudio.com Tel: [phone]
email: [email protected] Fax: [phone]
c
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 2006 SEIKAKU GROUP
SEIKAKU TECHNICAL GROUP LIMITED