Alto CLE4.0 User Manual
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Alto CLE4.0 User Manual

Quad compressor/limiter
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User's Manual
CLE4.0
QUAD COMPRESSOR/LIMITER
R
LTO
www.altoproaudio.com
Version 2.0 Dec. 2002
English

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Summary of Contents for Alto CLE4.0

  • Page 1 User's Manual CLE4.0 QUAD COMPRESSOR/LIMITER www.altoproaudio.com Version 2.0 Dec. 2002 English...
  • Page 2 SAFETY RELATED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol, wherever used, alerts you to the pre- sence of un-insulated and dangerous voltages with- in the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.
  • Page 3 PREFACE Dear Customer: Thanks for choosing LTO CLE 4.0 Quad/Compressor/Limter and thanks for choosing one of the results of AUDIO TEAM job and researches. For our LTO AUDIO TEAM, music and sound are more then 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.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS 1. INTRODUCTION...4 2. THE CONCEPT BEHIND...4 2.1 Some technical stuff 2.2 Voltage Controlled Amplifier (VCA) 2.3 Inputs 3. CONTROL ELEMENTS ...6 READY TO ROLL? ...7 4.1 Compressor Section 4.2 Peak Limiter Section 5. INSTALLATION AND CONNECTION...9 5.1 Mains Connection 5.2 Audio Connection 5.3 Rack Mounting 6.

  • Page 5: Introduction

    1. INTRODUCTION You are now the Owner of an We have included in it several innovative circuit designs that make the CLE 4.0 a very versatile processor: smart and fast recognition of the program and very low distortion Voltage Control Amplifier (VCA) Feature List: Smart Knee Control Compressor (SKC) Soft knee or hard knee? This is the question! SKC combines both: In the "soft knee"...

  • Page 6: Voltage Controlled Amplifier (Vca)

    Clipping Aera Noise Aera Chart. 2 The interactive relationship between the operating level and the headroom So the operating level must be as high as possible but not high enough to generate distortion. Tricky uh? There is a very easy way to obtain this. With the volume knob in hand you increase the volume during low passages and decrease the volume during loud passages.

  • Page 7: Control Elements

    3. CONTROL ELEMENTS Your CLE 4.0 presents with four channels. Each channel is equipped with the same control elements: 3 push-button switches, 4 rotary controls and 17 LEDs. You can operate in stereo mode via pressing the Couple switch. The details please refer to following content.

  • Page 8: Ready To Roll

    9. Threshold Control for Limiter The threshold Level for the Limiter will be adjusted by this control 10. Limiter LED When the Limiter is active, this LED will flash up. 11. Couple Switch When pressing this button Channel 1 and 3 will operate in stereo mode. 12.
  • Page 9 4.1.2 Ratio ontrol This control sets the change of input level to output level but only for the signals that exceed the threshold. The scale of the ratio control on the front panel (calibrated in dB) indicates how much input level is required to increase the output level by 1dB.

  • Page 10: Peak Limiter Section

    4.2 The Peak Limiter Section How fast is the compressor to react to a signal which is above the threshold point? This is determined by the attack time. A longer attack time is advisable to process low frequencies while shorter attack time is preferable for high frequencies.

  • Page 11: Rack Mounting

    For XLR connector Pin1 ( ) XLR Type Unbalanced b. In Line Connection Please see following drawing for details. Balanced TIP RING SLEEVE TIP RING SLEEVE Unbalanced TIP RING SLEEVE TIP SLEEVE TIP SLEEVE TIP RING SLEEVE TIP SLEEVE TIP RING SLEEVE 5.3 Rack ounting The most secure mounting is on a universal rack shelf available from various rack manufactures or your music...

  • Page 12: Technical Specifications

    6. TECHNICAL SPECIFICATIONS AUDIO INPUT AUDIO OUTPUT COMPRESSOR SECTION PEAK LIMITER SECTION FUNCTION SWITCHES INDICATORS POWER SUPPLY POWER CONSUMPTION DIMENSIONS WEIGHT Type Active balanced XLR and 1/4"JACK Impedance Balanced: 50K Ohm Operating Level +4dBu /-10dBv Maximum input level CMRR >55dB @1KHz Type XLR and 1/4"...

  • Page 13: Warranty

    7. WARRANTY 1. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a more effective and efficient after-sales warranty service.
  • Page 14 SEKAKU ELECTRON IND. CO., LTD NO.1, LANE 17, SEC. 2, HAN SHI WEST ROAD, TAICHUNG, 401 TAIWAN http://www.altoproaudio.com Tel:886-4-22313737 email: alto@altoproaudio.com Fax:886-4-22346757 All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this manual without written permission is forbidden.

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