Alesis DEQ830 User Manual

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Reference Manual

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Table Of Contents

Introduction ..................................................................

3

Welcome!......................................................................................................

3

DEQ830 Key Features ....................................................................

4

How to Use This Manual................................................................

5

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

7

Important Safety Instructions (English)...................................

7

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

7

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

7

Instructions de Sécurité Importantes (French) ......................

9

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

9

Veuillez suivre ces précautions lors de l’utilisation de

 

l’appareil: ......................................................................................................

9

Lesen Sie bitte die folgende Sicherheitshinweise

 

(German) ...........................................................................................

11

Sicherheit Symbole verwendet in diesem Produkt.................................

11

Folgen Sie bitte diesen Vorkehrungen, wenn dieses

 

Produkt verwendet wird: ...........................................................................

11

CE Declaration of Conformity .....................................................

13

FCC Compliance Statement .........................................................

13

Chapter One: Quick Start Guide ..............................

15

If you can't wait to get started..................................................................

15

Step 1: Hook it up to a mixer........................................................

15

Step 2: Try some equalization ......................................................

16

Step 3: Store the Program.............................................................

16

Step 4: Save an EQ Curve..............................................................

17

DEQ830 Diagram.............................................................................

18

Chapter Two: Connections ........................................

19

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

19

Installing in a Rack ........................................................................

19

Thermal Considerations in Rack Mounting .............................

19

AC Power Hookup...........................................................................

20

Using the DEQ830 in another country...................................................

20

Connecting Inputs and Outputs ..................................................

21

Connecting to the Channel or Main Inserts of a mixing

 

console..........................................................................................................

21

Connecting to the inserts on an instrument amplifier ..........................

23

Connecting to equipment with XLR inputs and outputs .....................

23

Connecting to equipment with ADAT Optical inputs and

 

outputs..........................................................................................................

23

About Audio Cables ........................................................................

25

Chapter Three: Basics of Equalization...................

27

What is equalization? .....................................................................

27

Description of the Front Panel ....................................................

28

Description of the Basic Modes ...................................................

31

Basic operation: Program mode ..................................................

34

1

Basic operation: Edit mode...........................................................

34

Basic operation: Store mode.........................................................

41

Basic operation: Save Curve mode .............................................

41

Basic operation: Retrieve Curve mode ......................................

41

Basic operation: Channel Level mode........................................

42

Basic operation: Link mode..........................................................

42

Basic operation: Real Time Analyzer mode..............................

43

Basic operation: Utility mode ......................................................

45

System Exclusive Transmit (Send?)..................................................

48

Receiving System Exclusive bulk dumps.................................................

49

The "Hidden" Modes........................................................................

50

Demonstration mode.................................................................................

50

Lock mode...................................................................................................

50

Equalization Artifacts....................................................................

51

Constant Q vs. Variable Q .............................................................

52

Chapter Four: Applications.......................................

57

General EQ tips ...............................................................................

57

Filtering effects ...............................................................................

58

Settings chart...................................................................................

59

Chapter Five: Troubleshooting ................................

61

Line Conditioners and Protectors ..............................................

61

Care and Maintenance...................................................................

61

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

62

Specifications...................................................................

65

Audio Performance ....................................................................................

65

Mechanical ...................................................................................................

65

Warranty/Contact Alesis ............................................

67

Alesis Limited Warranty.............................................................................

67

Alesis Contact Information.......................................................................

68

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Introduction

Welcome!

Thank you for purchasing the Alesis DEQ830. It is a versatile product, and whether it becomes a part of your studio or finds its place in your live setup, we know it will serve you well. Since 1984, we’ve been designing and building creative tools for the audio community. We believe in our products, because we've heard the results that creative people like you achieve with them.

One of the goals of Alesis is to make high-qualitymusic technology available to everyone. This Reference Manual is an important part of that, because in it we try to present the DEQ830’s features in a way that is easy to understand and remember. But even beyond explaining each feature and parameter, this manual can be a key that unlocks an application for the DEQ830 that you may not have considered. So we try to write our manuals as carefully as we build our products.

The goal of this manual is to get you the information you need as quickly as possible, with a minimum of hassle. We hope we've achieved that. If not, please drop us an email and give us your suggestions on how we could improve future editions of this manual.

We hope your investment will bring you many years of creative enjoyment and help you achieve your goals.

Sincerely,

The people of Alesis

For more effective service and product update notices, please register your DEQ830 online at:

http://www.alesis.com/ support/warranty.htm

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DEQ830 Key Features

1.Offers the best of digital technology and analog-stylecontrol: a graphic display with instant editing of any band or combination of bands, plus the ability to store programs

2.100 user-definableprograms, each of which holds 8 channels of EQ settings

3.100 user-definablecurves, each of which holds 30 bands of EQ settings

4.48 KHz sampling rate, 24-bitA/D/A,28-bitinternal processing

5.Eight channels of equalization, independent or linkable

6.30 EQ bands per channel, spanning 25 Hz-20KHz in 1/3- octave increments

7.+/- 12 dB boost/cut with center detente

8.Constant Q technology for finer control of audio

9.LOCK function for “set and forget” situations, which prevents accidental reprogramming

10.Retrieve Curve mode for auditioning and selecting stored EQ curves

11.Individual Channel Level adjustment per program

12.Master Level adjustment

13.[LINK] button for quick creation of matched EQ curves

14.Ability to bypass any or all channels using [BYPASS] and

[BYPASS ALL] buttons

15.Configurable editing modes to suit the way you work

16.Ability to copy settings from one channel to another

17.Easy-to-read7-segmentNumerical LED Display

18.More than 350 Band Gain LEDs, making it easy to read EQ curves from a distance

19.Signal Level, Clip and Bypass LEDs for each channel

20.Balanced input/output (TRS)

21.Compact 1-spacerackmount profile

22.Real-timeAnalyzer (RTA) mode for visual feedback of incoming and outgoing audio signals, with selectable metering modes

23.ADAT Optical input/output, auto-sensingof incoming digital audio

24.Clock selectable between 44.1k and 48k sampling rates

25.MIDI in/out for program changes and sys-exstorage

26.+4 dBu/-10dBV operating level switch on rear panel

For full operating specifications, see page 65.

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How to Use This Manual

This manual is divided into the following sections describing the various functions of and applications for the DEQ830. While it's a good idea to read through the entire manual once carefully, those having general knowledge about audio equipment should use the table of contents to look up specific functions.

Chapter 1: Quick Start Guide. If you're already familiar with equalization, this will get you started using the DEQ830 right away. This section presents the essential elements of hooking up the unit and using it for the first time.

Chapter 2: Connections. This section gives detailed instructions for connecting the DEQ830 to a variety of typical audio systems.

Chapter 3: Basics of Equalization. This section describes what an equalizer does and explains the function of each of the controls.

Chapter 4: Applications. Skip to this section for tips on using the DEQ830 in a variety of settings. You’ll also find a blank chart representing the DEQ830’s 30 bands of EQ. You can make copies of this chart and use them to keep track of some of your

favorite settings.

Chapter 5: Troubleshooting. Near the end of the manual you will find troubleshooting tips and a complete list of the DEQ830’s specifications.

Helpful tips and advice are highlighted in a shaded box like this.

The names of specific buttons on the DEQ830 are printed in a bold font and bracketed: e.g., the [BYPASS] button.

When something important appears in the manual, an exclamation mark (like the one shown at left) will appear with some explanatory text. This symbol indicates that this information is vital when operating the DEQ830.

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Important Safety

Instructions

Important Safety Instructions (English)

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.

This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shocks.

This symbol warns the user that output connectors contain voltages that can cause dangerous electrical shock.

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 faceplate, as this may damage the front panel 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.

Continued next page

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12.Use only with a cart, stand, bracket, 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 from tip-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 unit produces heat when operated normally. Operate in a well-ventilatedarea with at least six inches of clearance from peripheral equipment.

16.This product, in combination with an amplifier and headphones or speakers, 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.

17.Do not expose the apparatus to dripping or splashing. Do not place objects filled with liquids (flower vases, soft drink cans, coffee cups) on the apparatus.

18.WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

19.The unit is an audio device, whose power supply may be subject to surrounding electronic interference. Once installed, if you find that the unit is malfunctioning, the problem may be solved by resetting the unit, relocating the unit, or by installing a line-conditioner.

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