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Alto CLE8.0 manual

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Table of contents for the manual

  • Page 1

    User's Manual LTO R www .altoproaudio.com V ersion 2.1 Dec. 2002 English CLE8.0 COMPRESSOR /LIMITER /GA TE[...]

  • Page 2

    1 SAFETY RELA TED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground T erminal AC mains (Alternating Current) Hazardous Live T erminal ON: Denotes the product is turned on. OFF: Denotes the product is turned off. W ARNING Describes precautions that should be observed to prevent the possibility of death or injury to the user . CAUT[...]

  • Page 3

    PREF ACE Dear Customer: Thanks for choosing L T O CLE 8.0 Compressor/Limter/Gate and thanks for choosing one of the results of L TO AUDIO TEAM job and researches. For our L T O 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 tim[...]

  • Page 4

    3 T ABLE OF CONTENTS 1. INTRODUCTION........................................................................................................................................4 2.1 Some technical stuff 2. THE CONCEPT BEHIND..........................................................................................................................4 2.2 V [...]

  • Page 5

    4 1. INTRODUCTION Y ou are now the Owner of an CLE 8.0 Compressor/Limiter/Gate. The CLE 8.0 is a very powerful dynamic processor . LT O We have included in it several innovative circuit designs that make the CLE 8.0 a very versatile processor: smart and fast recognition of the program, adjustable Expander/Gate and very low distortion V oltage Contr[...]

  • Page 6

    5 2.1.2 Introducing Audio Dynamics Chart.1: The dynamic range capabilities of various devices Chart.2: The interactive relationship between the operating level and the headroom 2.1.3 More technical stuff about Compressor/Limiters Clipping Signal heavily distrorted Clipping Signal heavily distrorted Low level signal drowned out by noise Low level si[...]

  • Page 7

    6 2.1.4 More about noise: Expanders and Noise-Gates A lot of instruments such as microphones, amplifiers, guitar pickups, etc generate some noise, either at low fre- quencies (hum) or at high frequencies (hiss) Such noise will inevitably interfere with the quality of your audio signal. Now , if you scream into a microphone you will not hear the noi[...]

  • Page 8

    5. SC Filter switch Engaging this switch to insert a Low-cut filter in the sidechain path and thus limits the influence of low frequencies on the CLE 8.0's control processes. 6. Smart switch Engaging this button to switch the "Hard Knee" characteristics to SKC (Smart Knee Control). SKC provides a compression of the program material a[...]

  • Page 9

    3.3 Compressor Section 8 Pic.4: Compressor Section 11 13 14 12 15 16 17 150 6 1 70 15 30 0.1 0.05 0.3 3 5 1.5 0.5 -10 +20 -20 0 +10 COMPRESSOR(dB) RATIO(N:1) AUTO ATTACK(mSec) RELEASE(dB/Sec) OUTPUT GAIN(dB) -30 -40 +10 +20 1 2 10 4 1 1 1. Compressor Control This control adjusts the threshold level for the Compressor section in the range of -40dB t[...]

  • Page 10

    3.5 The Rear Panel 9 Pic.6: Pear Panel Of The CLE8.0 OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OPERATING LEVEL RETURN SEND 4dBu 10dBV INPUT OPERATING LEVEL RETURN SEND 4dBu 10dBV INPUT OPERATING LEVEL RETURN SEND 4dBu 10dBV INPUT OPERATING LEVEL RETURN SEND 4dBu 10dBV INPUT OPERATING LEVEL RETURN SEND 4dBu 10dBV INPUT OPERATING LEVEL RETURN [...]

  • Page 11

    10 4. READY TO ROLL? 4.1 Expander/Gate Section Chart.3: Function of an expander Chart.4: SRC Curve characteristics of the Adaptive Expander 4.1.1 EXP/GA TE djustment A The EXP/GA TE control covers a very wide range and it is ef ficient with any working level. T urn the threshold control fully counterclockwise and the Expander/Gate section will be c[...]

  • Page 12

    11 Y ou need to be aware that higher ratio settings produce less natural sounds so if you wish a more minute effect on the dynamic range of a program you should use a Ratio of 4:1 or lower . 4.2.3 Attack control Output Hard Knee Threshold Gain 0 dB Rati o 2:1 Rati o 4:1 Limiter :1 SKC Curve Input Chart.5: SKC characteristic of the compressor sectio[...]

  • Page 13

    4.3 Peak Limiter Section 5. INSTALLATION AND CONNECTION 5.1 Mains Connection 5.2 Audio connection Chart.7: SGC characteristic of the limiter section 12 Chart.6: The ef fect of a compressor can be expressed as the amount of gain reduction that is taking place for any given input Peak Limiting 6ms 15ms Level Program Limiting Input Release Output appr[...]

  • Page 14

    13 a. Wiring Configuration Both types of connectors available on CLE 8.0 can be wired in balanced and unbalanced modes. Please see following drawing for details: b. In Line Connection Please see following drawing for details. For 1/4" Phone jack For XLR connector XLR T ype Unbalanced XLR T ype alanced B Pin3 (-) Pin2 (+) Pin1 ( ) (Linked to Pi[...]

  • Page 15

    14 5.3 Rack ounting M The most secure mounting is on a universal rack shelf available from various rack manufactures or your music dealer . The CLE 8.0 Compressor /Limiter /Gate fits into one standard 19" rack unit of space, and its height is 4H. Please allow at least an additional 4" depth for the connectors on the rear panel. Be sure th[...]

  • Page 16

    15 6. TECHNICAL SPECIFICA TIONS SYSTEM SPECIFICA TIONS EXP ANDER/GA TE SECTION INPUT T ype Active balanced XLR and 1/4"JACK Impedance Balanced >50KOhm, Unbalanced>25KOhm Operating level +4dBu/ 10dBV Max input level +21dBu balanced and unbalanced CMRR T ypically>55dB at 1KHz OUTPUT T ype XLR and 1/4" JACK Impedance Balanced 60 Ohm[...]

  • Page 17

    16 SMART Enables the "Smart Knee Control" characteristics. SC FIL TER Allows for frequency dependent processing. AUTO Enable the automatic and program dependent setting of the Attack /Release times, disengaging the manual Attack /Release controls. I/O METER Switches between input and output for the Level Meter . BYP ASS Bypass switch. OPE[...]

  • Page 18

    17 7. W ARRANTY 1. W ARRANTY REGISTRA TION CARD T o obtain W arranty 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 W arranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a [...]

  • Page 19

    SEIKAKU TECHNICAL GROUP LIMITED No. 1, Lane 17, Sec. 2, Han Shi W . Road, T aichung, 401 T aiwan http://www .altomobile.com T el: 886-4-22313737 email: info@altomobile.com Fax: 886-4-22346757 All rights reserved to AL T O Mobile. Due to continued development in response to customer feedback, product features, specifications and/or internal/external[...]