User's Manual CLE2.0 COMPRESSOR /LIMITER /GATE R LTO www.altoproaudio.com Version 2.0 Dec.
the recommended fuse type as indicated in this manual. Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet. SAFETY RELATED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.
PREFACE Dear Customer: Thanks for choosing LTO CLE 2.0 Compressor/Limter/Gate and thanks for choosing one of the results of AUDIO TEAM job and researches. LTO 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.
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. CONTROLS..............................................................................................................
1. INTRODUCTION You are now the Owner of an LTO CLE 2.0 Compressor/Limiter/Gate. The CLE 2.0 is a very powerful dynamic processor. We have included in it several innovative circuit designs that make the CLE 2.0 a very versatile processor: smart and fast recognition of the program, adjustable Expander/Gate and very low distortion Voltage Control Amplifier (VCA).
2.1.2 Introducing Audio Dynamics The human ear can detect the noise generating by falling leaves as well as the roar generated by the taking off space shuttle. Unfortunately no analog, nor digital device can reproduce such wide spectrum. Please look at Chart.1 and you will see the difference if dynamic capacity of various devices when compare to the human ear. More problems occur when handling high level signals and low level signals.
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 frequencies (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 noise generated by such microphone because such noise will be "masked" by the higher level of the signal, your voice in this case.
3. Ratio Control This control determines the expansion ratio when the signal drops below the threshold level. The expansion ratio can be set from 1:1.2 to 1:8 (Low ratio level for Expander application or 1:8 for Gate application). 4. Threshold LED The "+" Led lights up when an audio signal is below the set threshold. The "-" Led lights up in presence of an expansion 3.
13. SC Monitor Switch You can connect the sidechain control signal to the audio output by mean of this switch and at the same time you will also mute the audio input. In this way you can also monitor the sidechain signal being returned via external signal processors. 14. Sidechain Filter Switch A low-cut filter in the sidechain path is activated by this switch. This eliminates unwanted noise generated by low frequencies. 15. Smart switch Hard knee mode will be converted into SKC mode by mean of this switch.
3.
27. Sidechain Send Through this 1/4" unbalanced jack the audio signal can be routed to an external processor. 28. Sidechain Return The return signal of an external processor will be processed through this 1/4" jack. 4. READY TO ROLL? 4.1 Expander/Gate Section Chart. 3 Function of an expander As we told you previously in this Manual the downward expander will reduce automatically the level of the audio signal when such signal is below a set threshold.
4.2.2 Ratio control 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 1 dB. If you have a ratio equal to 1:1 you will get the same level of input and output signal: So, no level change.
4.2.8 Gain Reduction Meter This consists of 12 LED on the front of the CLE 2.0. Through this Led meter you can visualise the amount of gain reduction at any given time. Chart. 6 The effect of a compressor can be expressed as the amount of gain reduction that is taking place for any given input 4.3 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. Wiring Configuration Both types of connectors available on CLE 2.0 can be wired in balanced and unbalanced modes. Please see following drawing for details: For 1/4" Phone jack For XLR connector XLR Type Unbalanced XLR Type Balanced b. In Line Connection Please see following drawing for details.
c. Insert Points Connection In case you are using the main inserts of your mixing console and you have a single jack for SEND and RETURN, you can use an insert Y cable. Please see following drawing. 1/4" TRS insert Send Return Tip Ring Sleeve Insert Leads SLEEVE TIP SLEEVE RING TIP 1 3 2 2 3 1 TIP RING SLEEVE TIP RING SLEEVE 5.3 Rack Mounting The most secure mounting is on a universal rack shelf available from various rack manufactures or your music dealer. The CLE 2.
6. TECHNICAL SPECIFICATIONS AUDIO INPUT Type Impedance Active balanced XLR and 1/4"JACK Balanced: 50K Ohm Unbalanced: 25K Ohm Operating Level +4dBu /-10dBv Balanced and Unbalanced: +21 dBu >55dB @1KHz XLR and 1/4" JACK Balanced: 60 Ohm Unbalanced: 30Ohm +21 dBu 20Hz to 20KHz at +0,-0.5dB 0.01% typ.1KHz, @+4dBu 0.04% typ,1KHz, @+20dBu 0.01% typ >-90dBu <-100dB 1/4"JACK >10K Ohm +24dBu 1/4"JACK 2K Ohm +21dBu Interactive Expander Variable: from OFF to +15dB Variable: from 1:1.
INDICATORS GAIN REDUCTION: 12 element LED INPUT / OUTPUT LEVEL: 8 element LED EXPANDER/GATE THRESHOLD: 2 element LED ( under"+" above"-") COMPRESSOR THRESHOLD: 3 element LED ( under"+" interactive"0" above"-" ) PEAK LIMITER THRESHOLD: 1 element LED (Limiter Function ) Function switch: LED indicator for each POWER SUPPLY 95-120V POWER CONSUMPTION 14 Watts DIMENSIONS WEIGHT 483(W) /210-240V 194.5(D) ,60-50Hz FUSE: 44(H)mm (19" 3.3kg(7.27lb) 16 210-240V: T200mAL 250VAC 95-120V: 400mA 250VAC 7.
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.
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.
