MS15SA - Loudspeaker ALTO - Free user manual and instructions

Product Type	Portable Bluetooth Speaker
Model	MS15SA
Brand	Alto
Dimensions	Approx. 18 x 8 x 8 cm
Weight	Approx. 0.5 kg
Power Source	Built-in rechargeable battery, USB-C charging
Battery Life	Up to 10 hours
Connectivity	Bluetooth 5.0, 3.5mm AUX input
Wireless Range	Up to 10 meters
Speaker Output	10W RMS
Frequency Response	80Hz - 20kHz
Controls	Buttons for power, volume, play/pause, Bluetooth pairing
Microphone	Built-in for hands-free calling
Water Resistance	IPX4 (splash-proof)
Compatible Devices	Smartphones, tablets, laptops
Box Contents	Speaker, USB-C cable, AUX cable, user manual
Cleaning	Wipe with dry cloth, avoid liquids
Battery Charging Time	Approx. 3 hours

Frequently Asked Questions - MS15SA ALTO

How do I pair my Alto MS15SA with a Bluetooth device?

Turn on the speaker by pressing the power button. It will enter pairing mode automatically. On your device, select 'Alto MS15SA' from the Bluetooth list. If prompted, enter '0000' as the PIN.

Can I use the speaker while it is charging?

Yes, the speaker can be used while charging via USB-C. However, it is recommended to charge it fully for optimal battery life.

How do I reset the speaker to factory settings?

Press and hold the power button for 10 seconds until you hear a tone. The speaker will restart and clear all paired devices.

What does the LED indicator mean?

A solid blue light indicates Bluetooth connection. Flashing blue means pairing mode. Red light indicates low battery or charging.

Can I connect two speakers together?

This model does not support stereo pairing or party mode with multiple speakers.

How do I clean the speaker?

Use a soft, dry cloth to wipe the exterior. Do not use water or cleaning agents, and avoid getting moisture in the ports.

What is the maximum volume level?

The speaker has 30 volume steps. At maximum volume, the output is 10W RMS, which may cause distortion at very high levels.

Why is the sound distorted?

Check if the source device is at a high volume or if the speaker is near a source of interference. Also, ensure the battery is not low.

How long does the battery last?

The battery lasts up to 10 hours at moderate volume. Actual lifespan depends on volume and music content.

Is the speaker waterproof?

It is IPX4 splash-proof, meaning it can withstand light rain or splashes, but not submersion in water.

USER MANUAL MS15SA ALTO

Close-up of a speaker grille with visible sound waves and a triangular warning symbol (no text or labels)

www.altoproaudio.com Version 2.0 SEPTEMBER 2007

English

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 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.

2. Keep this Manual in a safe place.

3. Be aware of all warnings reported 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.

7. Power Cords are designed for your safety. Do 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.

8. Unplug this equipment when unused for long periods of time or during a storm.

9. Refer all service to qualified service personnel only. Do not perform any servicing other than those instructions contained within the User's Manual.

10. To prevent fire and damage to the product, 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.

1. Move this Equipment only with a cart, 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.

Abstract black-and-white icon of a person pushing a large rectangular block, enclosed in a circular frame (no text or symbols)

1. 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	SPL	EXAMPLE
8	90	Small gig
6	92	train
4	95	Subway train
3	97	High level desktop monitors
2	100	Classic music concert
1,5	102
1	105
0,5	110

0,25 or less 115 Rock concert

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.

IN THIS MANUAL:

1. INTRODUCTION....1
2. QUICK START - PASSIVE SPEAKER CABINET....2
3. PANEL DESCRIPTION....7
4. WIRE CONNECTIONS....8
5. FREQUENCY RESPONSE DIAGRAM....9
6. TECHNICAL SPECIFICATION....11
7. WARRANTY....13

1. INTRODUCTION

Thank you very much for expressing your confidence in ▲LTO products by purchasing MS series powered speaker system. The MS series cabinets are specifically designed for using in hi-quality performance site and the precise sound commercial place. It includes five full range cabinets (MS12A, MS15A, MS152A, MS153A, and MS154A). This series 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 MS powered 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, users can select 16 different tastes and applications. The 16 kinds of sound presets especially thought for application with or without subwoofer, for voice optimized application, for Disco Music, for Jazz, for Rock & Roll among others.

Enjoy your MS active speaker cabinet and make sure to read this Manual carefully before operation!

Active, Full-range, two speakers. This is the simplest set-up. You do not need a power amplifier in between the mixer and the 2 MS speakers.

Make all initial connections with all the equipment powered off, and ensure that all the main volume controls are turned down completely.

1). Connect one side of the signal cable at your mixer into the Main Output Left /Right (with 1/4"Jack or XLR) and the other side of the cable in to the Line Input (COMBO) of your MS active speaker cabinet (with 1/4"Jack or XLR).
2). Connect the power cord to mains.
3). Turn ON your mixer first, then the MS cabinets.
4). Turn up the volume control of the MS cabinets.
5). Use PFL function to get the proper input level for the mixer, and adjust the Main Mix Level control to reach the desired output level.
6). After use, turn off your active speaker cabinets first, then the mixer.

2. QUICK START - ACTIVE SPEAKER CABINETS

Active, Full-range, multiple speakers. This solution is particularly flexible when you have a large stage and for fixed installations where you want to send the same signal to different zones like in a Bar, Pub, Restaurant, Church, etc. Each MS cabinet has its own volume control so you can adjust different volumes in different zones.

1). Follow the above steps connecting the MAIN OUTPUTS of the mixer to the LINE INPUTS of 2 MS active cabinets.
2). Connect the LINE OUT socket of the first MS cabinet to the LINE IN socket of the subsequent piece. You can connect as many speakers as you wish in this way.

graph TD
    A["Speaker 1"] -->|LINE IN| B["Mixer"]
    C["Speaker 2"] -->|LINE OUT| B
    D["Speaker 3"] -->|LINE IN| B
    E["Speaker 4"] -->|LINE IN| B
    F["Speaker 5"] -->|LINE OUT| B
    G["Speaker 6"] -->|LINE IN| B
    H["Speaker 7"] -->|LINE OUT| B
    I["Speaker 8"] -->|LINE IN| B
    J["Speaker 9"] -->|LINE OUT| B
    K["Speaker 10"] -->|LINE IN| B
    L["Speaker 11"] -->|LINE OUT| B
    M["Speaker 12"] -->|LINE IN| B
    N["Speaker 13"] -->|LINE OUT| B
    O["Speaker 14"] -->|LINE IN| B
    P["Speaker 15"] -->|LINE OUT| B
    Q["Speaker 16"] -->|LINE IN| B
    R["Speaker 17"] -->|LINE OUT| B
    S["Speaker 18"] -->|LINE IN| B
    T["Speaker 19"] -->|LINE OUT| B
    U["Speaker 20"] -->|LINE IN| B

Active, two satellite speakers & two subwoofers. In this example the mixer is connected to the subwoofers and then a line signal is sent to the respective satellites. In this way, the high energetic content of the low frequencies is limited to the subwoofer and the satellite's woofer act like a mid-woofer. As a consequence the satellites built-in amplifier is not stressed by low frequency content.

1). Connect one side of signal cable at your mixer into Main Output Left/Right (with 1/4" Jack or XLR) and the other side of the cable into the Left/Mono Input (COMBO) of the active subwoofers; with the second signal cable connect the Left/Mono Line Output of the subwoofer (Stereo/Mono-Jack or XLR) to the Line input (COMBO) of the active satellite (with Stereo - Jack or XLR).
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 use, turn off your active speaker cabinets first, then the mixer.

graph TD
    A["SubWOOFER"] -->|LINE IN\nLINE OUT LEFT/MONO| B["Mixer"]
    C["SubWOOFER"] -->|LINE IN\nLINE OUT LEFT/MONO| B["Mixer"]
    B -->|MAIN OUT LEFT\nLINE IN LEFT/MONO| D["Mixer"]
    B -->|MAIN OUT RIGHT\nLINE IN LEFT/MONO| E["SubWOOFER"]

Active, two satellite speakers and one subwoofers.

This is a very popular combination, especially in small size clubs where there is no need for two subwoofers.

1). Connect one side of signal cable at your mixer into Main Output Left (with 1/4"Jack or XLR) and the other side of the cable into the Left Input of the active subwoofer. Repeat for the RIGHT channel. With the second signal cable connect the Left Line Output of the subwoofer (Stereo/Mono-Jack or XLR) to the Line input (COMBO) of the active satellite (with Stereo-Jack or XLR). Repeat for the RIGHT channel
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 use, turn off your active speaker cabinets first, then the mixer.

Active, with Microphone and Line Level instruments.

Your Elvis cabinets come with both Line-level and with Microphone Inputs. You can directly connect a microphone into your Elvis cabinet using the MIC input and a keyboard or an electric guitar (you must interconnect a D/I Box if you want to use the guitar) and use the relative level controls as a simple mixer. You can then use the resident 3-bands graphic equalizer to fine-tune your sound. This configuration is good for presentation, meetings, aerobic centers and fashion shows (you can also connect a wireless microphone into the Line input, or for "One Man band" performances.)

ACTIVE FULL-RANGE: MS12A/MS15A/MS152A/MS153A/MS154A

(1) ON-OFF main power switch
(2) Input AC power socket with main fuse
(3) VOLUME main power amplifier control
(4) LINE OUT at + 4dB on XLR connector
(5) LINE IN at + 4dB on COMBO connector
(6) Ground Lift Switch
(7) POWER, Green LED, indicate ON status
(8) SIGNAL/LIMIT, Red LED, indicate ON status
(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, VIRTUAL SUB, STAGE MONITOR, JAZZ CLUB, CONCERT HALL+SUB, DISCO, VOCAL, ROCK & ROLL, FLAT, DRUM KICK, ANTIRUMBLE, CONCERT HALL, ARENA+SUB, LOUDNESS, ROCK & ROLL+SUB and ACOUSTIC.

-. 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:

• Balanced

graph TD
    A["Tip"] --> B["Ring"]
    C["Tip"] --> D["Sleeve"]
    E["Ring"] --> F["Sleeve"]
    G["Ring"] --> H["Sleeve"]
    I["1"] --> J["2"]
    K["1"] --> L["3"]
    M["1"] --> N["2"]
    O["2"] --> P["3"]
    Q["2"] --> R["3"]
    S["3"] --> T["3"]

- Unbalanced

graph TD
    A["Tip"] --> B["Ring"]
    B --> C["Sleeve"]
    D["Tip"] --> E["Ring"]
    E --> F["Sleeve"]
    G["Tip"] --> H["Sleeve"]
    I["Tip"] --> J["Sleeve"]
    K["1"] --> L["2"]
    M["1"] --> N["2"]
    O["1"] --> P["3"]
    Q["1"] --> R["2"]
    S["1"] --> T["3"]

5. FREQUENCY RESPONSE

MS152A

MS153A

MS154A

MS12A

MS15A

6. TECHNICAL SPECIFICATION

Model Item	MS12A
Active System Type	2-Way Bi-Amp. with MODELLER
Low Output Power	350 Watt EIAJ
High Output Power	65 Watt EIAJ
Max SPL 1mt	122 dB SPL calculated EIAJ
Frequency Response	MODELLER Presets Setting
Protection Low - High	Analog Limiter
Input Impedance	30 kΩ Balanced/15 kΩ Unbalanced
Input Sensitivity	Line +4 dB
Low Frequency Device	12" Woofer/2" Voice Coil
High Frequency Device	1" Neodymium Driver/1" Voice Coil
Coverage( H' x V')	90° H x 60° V Elliptical Wave Guide
Connectors	Input with Combo/Link with XLR
Cabinet	Trapezoidal Shape/Composite Wood/Metal Handle/Black Paint Finishing
External Control	MODELLER with 16 Preset/Line Volume/Clipping LED Indicator/Ground Switch
Dimensions( H x W x D)	650 x 400 x 365 (mm)
Net Weight (lbs/kg)	48.50 lbs/22 kg
Model Item	MS15A
Active System Type	2-way Bi-Amp. with MODELLER
Low Output Power	350 Watt EIAJ
High Output Power	65 Watt EIAJ
Max SPL 1mt	123 dB SPL Calculated EIAJ
Frequency Response	MODELLER Presets Setting
Protection Low - High	Analog Limiter
Input Impedance	30 kΩ Balanced/15 kΩ Unbalanced
Input Sensitivity	Line +4 dB
Low Frequency Device	15" woofer/2.5" Voice Coil
High Frequency Device	1" Neodymium Driver/1" Voice Coil
Coverage( H' x V')	90° H x 60° V Elliptical Wave Guide
Connectors	Input with Combo/Link with XLR
Cabinet	Trapezoidal Shape/Composite Wood/Metal Handle/Black Paint Finishing
External Control	MODELLER with 16 Preset/line Volume/Clipping LED Indicator/Ground Switch
Dimensions( H x W x D)	750 x 450 x 420 (mm)
Net Weight (lbs/kg)	59.52 lbs/27 kg
Model Item	MS152A
Active System Type	2-way Bi-Amp. with MODELLER
Low Output Power	350 Watt EIAJ
High Output Power	65 Watt EIAJ
Max SPL 1mt	126 dB SPL Calculated EIAJ
Frequency Response	MODELLER Presets Setting
Protection Low - High	Analog Limiter
Input Impedance	30 kΩ Balanced/15 kΩ Unbalanced
Input Sensitivity	Line +4 dB
Low Frequency Device	2 x 15" Woofer/2.5" Voice Coil
High Frequency Device	1" Driver/1.35" Voice Coil
Coverage( H' x V')	90° H x 60° V Elliptical Wave Guide
Connectors	Input with Combo/Link with XLR
Cabinet	Trapezoidal Shape/Multi-layer Plywood/Metal Handle/Black Paint Finishing
External Control	MODELLER with 16 Preset/line Volume/Clipping LED Indicator/Ground Switch
Dimensions( H x W x D)	1100 x 450 x 443 (mm)
Net Weight (lbs/kg)	83.29 lbs/37.78 kg

6. TECHNICAL SPECIFICATION

Model Item	MS153A
Active System Type	3-Way Bi-Amp. with MODELLER
Low Output Power	500 Watt EIAJ
High Output Power	500 Watt EIAJ
Max SPL 1mt	127 dB SPL Calculated EIAJ
Frequency Response	MODELLER Presets Setting
Protection Low - High	Analog Limiter
Input Impedance	30 kΩ Balanced/15 kΩ Unbalanced
Input Sensitivity	Line: +4 dB
Low Frequency Device	15" Woofer/2.5" Voice Coil
Mid Frequency Device	8" Midrange/2" Voice Coil
High Frequency Device	1" Driver/1.35" Voice Coil
Coverage( H° x V°)	90° H x 45° V Dual Wave Guide
Connectors	Input with Combo/Link with XLR
Cabinet	Trapezoidal Shape/Multi-layer Plywood/Metal Handle/Black Paint Finishing
External Control	MODELLER with 16-Preset/Line Volume/Clipping LED Indicator /Ground Switch
Dimensions( H x W x D)	900 x 450 x 415 (mm)
Net Weight (lbs/kg)	72.22 lbs/32.76 kg
Model Item	MS154A
Active System Type	3-Way Bi-Amp. with MODELLER
Low Output Power	750 Watt EIAJ
High Output Power	750 Watt EIAJ
Max SPL 1mt	131 dB SPL Calculated EIAJ
Frequency Response	MODELLER Presets Setting
Protection Low - High	Analog Limiter
Input Impedance	30 kΩ Balanced/15 kΩ Unbalanced
Input Sensitivity	Mic: -45 dB Line: +4 dB
Low Frequency Device	2x15" woofer/2.5" Voice Coil
Mid Frequency Device	8" Midrange/ 2" Voice Coil
High Frequency Device	1"Driver/1.35" Voice Coil
Coverage( H° x V°)	90° H x 45° V Dual Wave Guide
Connectors	Input with Combo/Link with XLR
Cabinet	Trapezoidal Shape/Multi-layer Plywood/Metal Handle/Black Paint Finishing
External Control	MODELLER with 16 Preset/Line Volume/Clipping LED Indicator / Ground Switch
Dimensions( H x W x D)	1250 x 450 x 443 (mm)
Net Weight (lbs/kg)	99.85 lbs/45.29 kg

7. 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 ▲LTO 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, ▲LTO 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 ▲LTO 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.

SEIKAKU TECHNICAL GROUP LIMITED

NO. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan

http://www.altoproaudio.com Tel: [phone]

email: [e-mail] Fax: [phone]

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