Alesis Alexis M1 User Manual

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Contents/Safety Warnings

Introduction

Thank you for purchasing the Alesis M1 Active Biamplified Reference Monitor. To take full advantage of the M1 Active’s operation, and to enjoy long and trouble-freeuse, please read this user’s manual carefully. We value any comments you may have about this monitor system, this manual, your Alesis dealer and about our factory service. Please take a minute now to fill out your warranty card and tell us what you think.

How to use this manual

This manual is divided into the following sections describing the various features of the M1 Active. Though we recommend you take time to read through the entire manual once carefully, those having general knowledge about monitors should use the table of contents to reference specific functions.

Chapter 1: About the M1 Active. Engineering specifications and reasons why nearfield monitors have become so popular.

Chapter 2: Speaker Installation. This chapter explains how to connect the M1 Actives to a mixer or otherline-levelsource and discusses proper speaker placement for stereo operation.

Chapter 3: Surround Sound. If you are using the M1 Active speakers in a multichannel surround sound setup, you’ll find helpful setup and operation information here.

Chapter 4: Troubleshooting. This chapter contains troubleshooting tips and service information should problems occur.

When something important appears in the manual, an icon (like the one on the left) will appear in the left margin. This symbol indicates that this information is vital when operating the M1 Actives.

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Contents/Safety Warnings

 

C

 

ONTENTS

Important Safety Instructions ................................................ 3

Safety symbols used in this product.............................................................

3

Please follow these precautions when using this product:..............................

3

Instructions de Sécurité Importantes ............................................................

4

Symboles utilisés dans ce produit ................................................................

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Beim Benutzen dieses Produktes beachten Sie bitte die folgenden

 

Sicherheitshinweise:....................................................................................

5

Information to the User for Class A Digital Device (FCC Part 15, Class A) ......

7

About the M1 Active............................................................. 8

Unpacking and Inspection...........................................................................

8

Inside your new speakers............................................................................

10

About Nearfield monitoring........................................................................

14

Speaker Installation ............................................................. 14

Avoiding reflections in the studio ................................................................

14

Stereo nearfield placement of the M1 Active.................................................

17

Connections ...............................................................................................

22

Setting the Input Level control.....................................................................

24

Surround Sound................................................................... 26

About surround sound................................................................................

26

Center speakers in music mixes ...................................................................

26

Placement of the center M1 Active speaker in the studio................................

27

Placement of rear surrounds........................................................................

29

Mixing for discrete six channel reproduction: matched vs. specialized

 

speakers.....................................................................................................

31

Troubleshooting .................................................................. 32

Troubleshooting Index................................................................................

32

Maintenance...............................................................................................

33

Specifications...................................................................... 35

Enclosure ...................................................................................................

35

Transducers ...............................................................................................

35

Crossover section........................................................................................

37

Amplifier Section........................................................................................

37

Acoustic Section .........................................................................................

37

General......................................................................................................

37

Index ................................................................................. 38

Alesis Extended Warranty ..................................................... 39

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Contents/Safety Warnings

IMPORTANTSAFETY

INSTRUCTIONS

Safety symbols used in this product

This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit.

Please follow these precautions when using this product:

1. Read these instructions.

2.Keep these instructions.

3.Heed all warnings.

4.Follow all instructions.

5.Do not use this apparatus near water.

6.Clean only with a damp cloth. Do not spray any liquid cleaner onto the speakers or rear panel, as this may damage the speakers, controls or cause a dangerous condition.

7.Install in accordance with the manufacturer's instructions.

8.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-typeplug. A polarized plug has two blades with one wider than the other. Agrounding-typeplug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10.Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11.Use only attachments or accessories specified by the manufacturer.

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Contents/Safety Warnings

12. Use only with a cart, stand, bracket, rack, or table designed for use with professional audio or music equipment. In any installation, make sure that injury or damage will not result from cables pulling on the apparatus and its mounting. If a cart is used, use caution when moving the cart/apparatus combination to avoid injury fromtip-over.

13.Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as when the power-supplycord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15.This product may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an audiologist.

Instructions de Sécurité Importantes

Symboles utilisés dans ce produit

Ce symbole alèrte l’utilisateur qu’il existe des instructions de fonctionnement et de maintenance dans la documentation jointe avec ce produit.

Ce symbole avertit l’utilisateur de la présence d’une tension non isolée à l’intérieur de l’appareil pouvant engendrer des chocs électriques.

Veuillez suivre ces précautions lors de l’utilisation de l’appareil:

1.Lisez ces instructions.

2.Gardez ces instructions.

3.Tenez compte de tous les avertissements.

4.Suivez toutes les instructions.

5.N’utilisez pas cet allareil à proximité de l’eau.

6.Ne nettoyez qu’avec un chiffon humide. Ne pas vaporiser de liquide nettoyant sur l’appareil, cela pourrait abîmer les contrôles de la face avant ou engendrer des conditions dangeureuses.

7.Installez selon les recommandations du constructeur.

8.Ne pas installer à proximilé de sources de chaleur comme radiateurs, cuisinière ou autre appareils (don’t les amplificateurs) produisant de la chaleur.

9.Ne pas enlever la prise de terre du cordon secteur. Une prise murale avec terre deux broches et une troisièrme reliée à la terre. Cette dernière est présente pour

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Contents/Safety Warnings

votre sécurité. Si le cordon secteur ne rentre pas dans la prise de courant, demandez à un électricien qualifié de remplacer la prise.

10.Evitez de marcher sur le cordon secteur ou de le pincer, en particulier au niveau de la prise, et aux endroits où il sor de l’appareil.

11.N’utilisez que des accessoires spécifiés par le constructeur.

12.N’utilisez qu’avec un stand, rack ou table conçus pour l’utilisation d’audio professionnel ou instruments de musique. Dans toute installation, veillez de ne rien endommager à cause de câbles qui tirent sur des appareils et leur support.

13.Débranchez l’appareil lors d’un orage ou lorsqu’il n’est pas utilisé pendant longtemps.

14.Faites réparer par un personnel qualifié. Une réparation est nécessaire lorsque l’appareil a été endommagé de quelque sorte que ce soit, par exemple losrque le cordon secteur ou la prise sont endommagés, si du liquide a coulé ou des objets se sont introduits dans l’appareil, si celui-cia été exposé à la pluie ou à l’humidité, ne fonctionne pas normalement ou est tombé.

15.Cet appareil produit de la chaleur en fonctionnement normal. Si cet appareil est utilisé dans un rack, veillez à sa bonne ventilation lors de son utilisation. Ne pas faire fonctionner dans un rack fermé. S’il y a d’autres appareils dans le rack générant beaucoup de chaleur, éloignez les. Ne pas intercaler cet appareil entre deux appareils produisant beaucoup de chaleur.

16.Ce produit, utilisé avec un amplificateur et un casque ou des enceintes, est capable de produite des niveaux sonores pouvant engendrer une perte permanente de l’ouïe. Ne l’utilisez pas pendant longtemps à un niveau sonore élevé ou à un niveau non confortable. Si vous remarquez une perte de l’ouïe ou un bourdonnement dans les oreilles, consultez un spécialiste.

Beim Benutzen dieses Produktes beachten Sie bitte die folgenden Sicherheitshinweise:

1.Lesen Sie die Hinweise.

2.Halten Sie sich an die Anleitung.

3.Beachten Sie alle Warnungen.

4.Beachten Sie alle Hinweise.

5.Bringen Sie das Gerät nie mit Wasser in Berührung.

6.Verwenden Sie zur Reinigung nur ein weiches Tuch. Sprühen Sie keine flüssiger Reiniger auf die Oberfläche, dies könnte zur Beschädigung der Vorderseite führen und auch weitere Schäden verursachen.

7.Halten Sie sich beim Aufbau des Gerätes an die Angaben des Herstellers.

8.Stellen Sie das Gerät nich in der Nähe von Heizkörpern, Heizungsklappen oder anderen Wärmequellen (einschließlich Verstärkern) auf.

9.Verlegen Sie das Netzkabel des Gerätes niemals so, daß man darüber stolpern kann oder daß es gequetscht wird.

10.Benutzen Sie nur das vom Hersteller empfohlene Zubehör.

11.Verwenden Sie ausschließlich Wagen, Ständer, Racks oder Tische, die speziell für professionelle Audiound Musikinstrumente geeignet sind. Achten Sie immer darauf, daß die jeweiligen Geräte sicher installiert sind, um Schäden und Verletzungen zu vermeiden. Wenn Sie einen Rollwagen benutzen, achten Sie darauf, das dieser nicht umkippt, um Verletzungen auszuschließen.

12.Ziehen Sie während eines Gewitters oder wenn Sie das Gerät über einen längeren Zeitraum nicht benutzen den Netzstecher aus der Steckdose.

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Contents/Safety Warnings

13.Die Wartung sollte nur durch qualifiziertes Fachpersonal erfolgen. Die Wartung wird notwendig, wenn das Gerät beschädigt wurde oder aber das Stromkabel oder der Stecker, Gegenstände oder Flüssigkeit in das Gerät gelangt sind, das Gerät dem Regen oder Feuchtigkeit ausgesetzt war und deshalb nicht mehr normal arbeitet oder heruntergefallen ist.

14.Bei normalem Betrieb des Gerätes kommt es zu Wärmeentwicklungen. Wenn Sie das Gerät in einem Rack eingebaut haben, sollte während des Betriebes die Zufuhr von Kühlluft stets gewährleitstet sein. Arbeiten Sie nie bei geschlossenem Rack. Bei mehreren Rackgeräten sollten diese mit einem geringen abstand voneinander eingebaut werden. Stapeln Sie dieses Gerät nicht zwischen Geräten mit hoher Wärmeentwicklung.

15.Dieses Produkt kann in Verbindung mit einem Verstärker und Kopfhörern oder Lautsprechern Lautstärkepegel erzeugen, die anhaltende Gehörschäden verursachen. Betreiben Sie es nicht über längere Zeit mit hoher Lautstärke oder einem Pegel, der Ihnen unangenehm is. Wenn Sie ein Nachlassen des Gehörs oder ein Klingeln in den Ohren feststellen, sollten Sie einen Ohrenarzt aufsuchen.

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Information to the User for Class A Digital Device (FCC Part 15, Class A)

This equipment has been tested and found to comply with the limits for a class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense.

The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user’s authority to operate this equipment.

Use only shielded and grounded cables with this equipment to ensure compliance with FCC Rules.

Industry Canada (Digital Apparatus)

Interference-CausingEquipment Standard

ICES-003Issue 2

This Class A digital apparatus meets all requirements of the Canadian

Interference-CausingEquipment Regulations.

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Contents/Safety Warnings

CE

DECLARATION OFCONFORMITY

Approvals pending. See enclosed sheet if product was authorized for shipment to the EU.

CHAPTER1

ABOUT THEM1 ACTIVE

Unpacking and Inspection

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About the M1 Active

Your M1 Active Biamplified Reference Monitors were packed carefully at the factory, and the shipping carton was designed to protect the speakers during shipping. Please retain this container in the highly unlikely event that you need to return the speakers for servicing.

The shipping carton should contain the following items:

This instruction manual

M1 Actives with the same serial numbers as shown on the shipping cartons

Two AC power cords (NEMA to CEE type)

Alesis warranty card

Two pieces of adhesive-backednon-skidfoam

It is important to register your purchase; if you have not already filled out your warranty card and mailed it back to Alesis, please take the time to do so now.

The M1 Actives are designed as mirror-imagedpairs. If you have received a pair where the tweeters are both on the same side, contact your dealer immediately.

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About the M1 Active

Inside your new speakers

If you’re in a hurry to get started, skip ahead to Chapter 2, “Speaker Installation”, for connection and placement tips.

About powered monitors

The M1 Actives combine a speaker and amplifiers in the same compact cabinet. Powered monitors are growing in popularity over the traditional separate amplifier and speakers for a number of reasons, convenience and ease of hookup being only one of them. You can connect a powered speaker directly to any line-levelsource (normally, the control room output of a mixer) simply by connecting a patch cord.

Another benefit is improved sound quality. With careful design, the speaker, amplifier and electronic crossover can be optimised for each other. The M1 Actives are biamplified, meaning that low frequencies and high frequencies are handled not only by separate speakers (the tweeter and the woofer), but by separate amplifiers. A pair of M1 Actives contain a total of four power amplifiers. Because of the increased efficiency of biamplification, these are much louder than asingle-channelpower amplifier of the same wattage feeding a passive crossover, as in other designs. New technology makes it possible to make thesehigh-wattageamplifiers small enough to fit inside the speaker cabinet, with very little weight or size gain.

Since the M1 Actives are self-powered,DO NOT connect them to the speaker output of another amplifier (such as a powered mixer orhi-fireceiver). Connect them only to theline-leveloutputs of such devices (+4 dBu nominal, +24 dBu maximum).

Tone

Tonally, every effort has been made to emulate the accurate studio sound of Alesis’ Monitor One but with enhanced low bass and high frequency extension. The nominal frequency response is 50Hz-20KHz±2dB. (See Figure 1) Additionally, the use of electronic crossovers within the critical upper midrange frequencies has reduced phase and time delay anomalies often associated with passive crossovers. By including discrete woofer and tweeter amplifiers andapplication-specificelectronic high and low pass crossover filters in the same enclosure the tonal accuracy of the M1 Active will always remain constant.

About the drivers

The M1 Active’s 6.5” woofer cone is made of proprietary non-wovencarbon fiber. This material is 25% lighter than polypropylene with twice the stiffness for quicker transient response in thelow-to-midbassregion and vastly improved midrange intelligibility (over polypropylene at 1500 Hz). Thenon-wovencarbon fiber cone,

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