Alto MS8A, MS12SA, MS12S, MS8 User Guide

OWNER'S MANUAL

MS8/MS8A/MS12S/MS12SA

SPEAKER ENCLOSURE

ACTIVE MODELSPASSIVE/

www.altoproaudio.com

Version 1.1 Apr 2009

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.

Read this Manual carefully before operation. Keep this Manual in a safe place.

Be aware of all warnings reported

with this symbol.

Keep this Equipment away from water and moisture.

Clean it only with dry cloth. Do not use solvent or other chemicals.

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

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

periods of time or during a storm.

Refer all service to qualified service personnel

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

train

Subway train

High level desktop monitors

Classic music concert

100 102 105 110 115

Rock concert

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. 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.

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

Right

Main Mix

Output

Tripod Mount

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

HOOK

3.HOOKUP DIAGRAMS

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

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