Nilfisk EQU User Manual

User's Manual

EQU Series

+18

0dB

15/31 Band Graphic Equalizer

+18

0dB

LTO

www.altoproaudio.com

Version 1.0 April 2002

English

SAFETY RELATED SYMBOLS

CAUTION

RISK OFELECTRIC SHOCK

DO NOTOPEN

This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure-voltage that may be sufficient to constitute a risk of shock.

This symbol ,wherever it appears ,alerts you to important operating and maintenance instructions in the accompanying literature . Read the manual .

Protective grounding terminal .

Alternating current /voltage .

Hazardous live terminal .

ON: Denotes the apparatus turns on .

OFF: Denotes the apparatus turns off ,because of

using the single pole switch ,be sure to unplug the AC power to prevent any electric shock before you proceed your service .

WARNING: Describes precautions that should be observed to prevent the danger of injury or death to the user .

CAUTION: Describes precautions that should be observed to prevent danger of the apparatus .

WARNING

Power Supply

Ensure the source voltage matches the voltage of

the power supply before turning ON the apparatus. Unplug this apparatus during lightning storms or when unused for long periods of time .

External Connection

The external wiring connected to the output hazardous live terminals requires installation by an instructed person, or the use of ready-made leads or cords.

Do not Remove any Cover

There are maybe some areas with high voltages

inside , to reduce the risk of electric shock, do not

remove any cover if the power supply is connected.

The cover should be removed by the qualified personnel

only.

No user serviceable parts inside.

Fuse

To prevent a fire, make sure to use fuses with specified

standard (current, voltage, type). Do not use a different

fuse or short circuit the fuse holder.

Before replacing the fuse, turn OFF the andapparatus

disconnected the power source.

Protective Grounding

Make sure to connect the protective grounding to prevent

any electric shock before turning ON the apparatus.

Never cut off the internal or external protective grounding

wire or disconnect the wiring of protective grounding terminal.

Operating Conditions

This apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on this apparatus. To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Do not use this apparatus near water. Install in accordance with the manufacturer's instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not block any ventilation openings. No naked flame sources, such as lighted candles, should be placed on the apparatus.

IMPORTANT SAFETY INSTRUCTIONS

Read these instructions.

Follow all instructions. Keep these instructions. Heed all warnings. Only use attachments/accessories specified by the

manufacturer.

Power Cord and Plug

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. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles , and the point where they exit from the apparatus.

Cleaning

When the apparatus needs a cleaning, you can blow off dust from the apparatus with a blower or clean with rag etc. Don't use solvents such as benzol, alcohol, or other fluids with very strong volatility and flammability for cleaning the apparatus body. Clean only with dry cloth.

Servicing

Refer all servicing to qualified personnel. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so .

Servicing is required when the apparatus has been damaged in any way ,such as 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.

Preface

Dear Customer:

Thanks for choosing LTO Graphic Equalizer and thanks for choosing one of the results of LTO AUDIO TEAM job and researches.

For our LTO AUDIO TEAM, music and sound are more than a job...are first of all passion and let us say...our obsession! We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field.

The line presents unparalleled analogue and digital products made by Musicians for Musicians in ourLTO R&D Centr s in Italy, Netherlands, United Kingdom and Taiwan. The core of our digital audio products is ae sophisticated DSP (Digital sound processor) and a large range of state of the art algorithms which have been developed by our Software Team for the last 7 years.

Because we are convinced you are the most important member of LTO AUDIO TEAM and the one confirming the quality of our job, we would like to share with you our work and our dreams, pay attention to your suggestions and your comments. Following this idea we create our products and we will create the new ones! From our side, we guarantee you and we will guarantee you also in future the best quality, and the best fruits of our continuous researches and the best prices.

Our LTO Graphic Equalizer is the result of many hours of listening and tests involving common people, area experts, musicians and technicians. The results of this effort is a high-end Graphic Equalizer which will provide a permanent precise equalization to the musician, performer, studio engineer and sound contractor .

Nothing else to add, but that we would like to thank all the people that made the LTO Graphic Equalizer a reality available to our customers, thank our designers and all LTO staff, there to make possible the realization of products containing our idea of music and sound and there to support you, our customers, in the best way, conscious that you are our best richness.

Thank you very much.

LTOAUDIOTEAM

TABLE OF CONTENT

1. INTRODUCTION ..........................................................................................................................4

2. FEATURE LIST ............................................................................................................................4

3. CONTROL ELEMENTS ............................................................................... ..................................4

3.1 The Front Panel

3.2 The Rear Panel

4. INSTALLATION & CONNECTION ..................................................................................................8

4.1 Mains Connection

4.2 Audio Connection

- Wiring Configuration

- In Line Connection

- Insert Points Connection

4.3 Rack Mounting

5. APPLICATION ............................................................................................. .................................10

5.1 The Sound Frequency

5.2 Equalizer In Sound Reinforcement Systems

-Line Instrument

-Mixing Console

6. TECHNICAL SPECIFICATIONS ....................................................................................................12

7. WARRANTY ........... ............................................................................................ .........................13

1. INTRODUCTION

Thank you very much for expressing your confidence in LTO products by purchasing our EQU Series Graphic Equalizers. With the EQU Series you have acquired an extremely musical and flexible Graphic Equalizer.

The high-end EQU Series are based on many years of experience and are designed to provide a permanent precise equalization to the musician, performer, studio engineer and sound contractor. The EQU Series can be used wherever is requested to modify the frequency " contour " of a sound and can offer a solution to many common sound problems and allows the user to use the creativity to obtain nice results in terms of sound characterization.

EQU Series Graphic Equalizers include the following seven models:

EQU131 EQU215 EQU2215 EQU131VU EQU231VUEQU231LED EQU231TWIN -

Graphic Mono 31 Band Equalizer Graphic Stereo 15 Band Equalizer

Graphic Stereo 15 Band Equalizer

Graphic Mono 31 Band Equalizer / VU Meter*1

Graphic Stereo 31 Band Equalizer / VU Meter*2

Graphic Stereo 31 Band Equalizer / LED Display*2

Graphic Stereo 31Band Equalizer /LED Display*2

2. FEATURE LIST

Easy to Operate Front Panel Controls Constant Q circuitry with a 3% center frequency accuracy Control range 6dB / 12dB selectable Active balanced and unbalanced input and output connectors Variable input level control Signal clip pilot Ground "LIFT" switch to disconnect signal ground from chassis ground Power off automatic bypass function Line voltage selectable Robust and Compact design Intended for installation in standard 19" rack space Manufactured Under ISO9001 Certified management system

3. CONTROL ELEMENTS

3.1 The Front Panel

EQU131 Front Panel

LTO

EQU131

EQU215 Front Panel

Dual 15 Band Graphic Equalizer

LTO

EQU215

25 40 63 100 160 250 400 630

EQU2215 Front Panel

Dual 15 Band Graphic Equalizer

LTO

EQU2215

25 40 63 100 160 250 400 6301K1.6K 2.5K4K6.3K 10K 16K

1.6K 2.5K4K6.3K 10K 16K

31 Band Graphic Equalizer

+12 +6

-12

+17

HI-PASS LOW-PASS

0dB

-6

40Hz 16 KHz

LEVEL20K16K12.5K10K8K6.3K5K4K3.15K2.5K2K1.6K1.25K1K8006305004003152502001601251008063504031.52520

1 2 3 4 576 9 8

131243131243

Channel One

HI-PASS

LOW-PASS

+18

+12 +6

40Hz

0dB

-6

-12

BYPASS

LEVEL

2 6 8 5 7

+18

+12 +6

+14

+10

0dB

HI-PASS

LOW-PASS

-8

-12

40Hz

-6

-12

BYPASS

LEVEL

16KHz

RANGE

16KHz

RANGE

40Hz

16KHz

BY-PASS

CLIP

16KHz

Channel Two

40 63 100

250 400 630 1K 1.6K 2.5K 4K 6.3K 10K

160

Channel Two

40Hz

40 63 100

CLIP

250 400 630 1K 1.6K 2.5K 4K 6.3K 10K

160

RANGEBY-PASS

CLIP

HI-PASS

LOW-PASS

+18

+12 +6

40Hz

16KHz

0dB

-6

-12

BYPASS

LEVEL

RANGE

16K

2 6 8 5 7 10

+18

+12 +6

+14

+10

0dB

HI-PASS

LOW-PASS

-8

-12

40Hz

16KHz

-6

-12

BYPASS

LEVEL

RANGE

16K

40Hz

16KHz

BY-PASS

CLIP

40Hz

16KHz

BY-PASSBY-PASS

CLIP

OFF

POWER

OFF

1212

POWER

OFF

+ 9 hidden pages