Alesis PEQ-450 Manuel utilisateur
PEQ-450 Reference Manual 1
Five-Band Parametric Equalizer
Reference
Manual
2001
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Contents
Welcome!........................................................................................................................6
How to Use This Manual ...........................................................................7
Important Safety Instructions....................................................................8
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: Try some filtering.................................................................17
Connections.................................................................................................................19
Unpacking and Inspection.......................................................................19
Installing in a Rack ....................................................................................19
Power ...........................................................................................................20
Connecting inputs and outputs ..............................................................22
Connecting to the Channel Inserts of a mixing console: ...........22
Connecting to the Main Inserts of a mixing console: .................23
Connecting to the inserts on an instrument amplifier:..............24
Connecting to equipment with XLR inputs and outputs:.........25
Dual Channel Operation ..........................................................................25
About Audio Cables..................................................................................26
Basics of Equalization............................................................................................... 7
What is equalization?................................................................................27
Description of Controls ............................................................................28
Gain...................................................................................................28
Frequency.........................................................................................28
Q ........................................................................................................29
HPF ...................................................................................................30
LPF ....................................................................................................30
Input..................................................................................................31
Output ..............................................................................................31
Equalization Artifiacts..............................................................................32
Distortion .........................................................................................32
Noise .................................................................................................32
Phasing .............................................................................................32
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Applications.................................................................................................................33
Rock Kick Drum .............................................................................33
Vocal Air ..........................................................................................33
Hum Removal.................................................................................34
Tape hiss removal...........................................................................34
Eliminating feedback .....................................................................34
Troubleshooting.........................................................................................................37
Troubleshooting Index .............................................................................37
Avoiding ground loop noise ........................................................38
Line Conditioners and Protectors ...............................................39
Care and Maintenance..............................................................................40
Cleaning ...........................................................................................40
Refer All Servicing to Alesis.........................................................40
Obtaining Repair Service ..............................................................40
Specifications..............................................................................................42
Alesis Limited Warranty...........................................................................................43
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Welcome!
Thank you for making the Alesis PEQ-450™ a part of your studio.
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 have achieved with them.
One of Alesis' goals is to make high-quality studio equipment
available to everyone, and this Reference Manual is an important
part of that. After all, there's no point in making equipment with all
kinds of capabilities if no one explains how to use them. 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 Studio Electronics
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How to Use This Manual
This manual is divided into the following sections describing the
various functions and applications for the PEQ-450. While it's a
good idea to read through the entire manual once carefully, those
having general knowledge about studio equipment should use the
table of contents to look up specific functions.
Chapter 1: Quick Start. If you're already familiar with recording,
this will get you started using the PEQ-450 right away. It's a short
guide to the essential elements of connections and operation.
Chapter 2: Connections. This section gives detailed instructions for
connecting the PEQ-450 to a variety of typical audio systems.
Chapter 3: Basics of Equalization. This section explains 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
PEQ-450 with a variety of audio sources.
Chapter 5: Troubleshooting. Refer to this chapter if you experience
any problems while using the PEQ-450.
Helpful tips and advice are highlighted in a shaded box like this.
The names of specific controls or connectors on the PEQ-450 are
printed in a special font, i.e., the BYPASS button.
✪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 PEQ-450.
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Important Safety 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.
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-
type plug. A polarized plug has two blades with one wider than
the other. A grounding-type plug 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
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PEQ-450 Reference Manual 9
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.
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-supply cord 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-ventilated area 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, softdrink 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.
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Instructions de Sécurité Importantes (French)
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.
Ce symbole prévient l'utilisateur de la présence de tensions
sur les raccordements de sorties, représentant un risque
d'électrocution.
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. Il est potentiellement
dangereux d'utiliser des pulvérisateurs ou nettoyants liquides
sur cet appareil.
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 votre sécurité. Si le cordon
secteur ne rentre pas dans la prise de courant, demandez à un
électricien qualifié de remplacer la prise.
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