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QUAD COMPRESSOR/LIMITER

User's Manual

LTO

R

www.altoproaudio.com

Version 2.0 Dec. 2002

English

CLE4.0

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Summary of Contents for CLE4.0

Page 1: ...QUAD COMPRESSOR LIMITER User s Manual LTO R www altoproaudio com Version 2 0 Dec 2002 English CLE4 0 ...

Page 2: ...y 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 Protective Ground Before turning the product ON make sure that it is connected to Ground This is to prevent the risk of electric shock Never cut internal or external Ground wires Likewise never remove Ground wir...

Page 3: ...r and thanks for choosing one of the results of LTO AUDIO TEAM job and researches 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 the best fruits of our continuous researches and the best prices Thank you very much LTO AUDIO TEAM Our LTO CLE 4 0 is the result of many hours of listeni...

Page 4: ...IND 4 2 2 Voltage Controlled Amplifier VCA 2 3 Inputs 3 CONTROL ELEMENTS 6 4 7 READY TO ROLL 4 1 Compressor Section 4 2 Peak Limiter Section 6 TECHNICAL SPECIFICATIONS 11 7 WARRANTY 12 3 5 INSTALLATION AND CONNECTION 9 5 1 Mains Connection 5 2 Audio Connection 5 3 Rack Mounting ...

Page 5: ...manufacture audio equipment with a very high dynamic range up to 125 dB But the dynamic range of digital equipment is more or less 25 dB less A further reduction in dynamic range occurs with the use of tape recorders and or vinyl records 4 2 THE CONCEPT BEHIND 2 1 1 It is not just Music Yes a piece of electronic will produce some noise When the current flows through a conductor this will generate ...

Page 6: ... more or less limit do the same job but Limiters brutally the audio signal above a set threshold while Compressors and handle signal in a much more civilised way over a wide range of levels If an audio signal any audio exceed the threshold set by the User the limiter will kill signal above that threshold exceed a Period Also Compressors perform their function when the audio signal certain threshol...

Page 7: ...5 2 6 3 4 9 11 13 12 14 OPERATING LEVEL RING PIN 3 SLEEVE PIN 1 TIP PIN 2 TIP PIN 2 RING PIN 3 SLEEVE PIN 1 CHANNEL 4 CHANNEL 3 CHANNEL 2 CHANNEL 1 OUTPUT INPUT OUTPUT INPUT OUTPUT INPUT OUTPUT INPUT dBu 4 10dBV dBu 4 10dBV OPERATING LEVEL OPERATING LEVEL 14W AC INPUT 95 120V 210 240V 60 50Hz Rated Power Consumption FUSE 210 240V T315mAL 250VAC 95 120V 630mA 250VAC REPLACE FUSE WITH CORRECT TYPE O...

Page 8: ...Y TO ROLL 4 1 Compressor Section Sophisticated Voltage Controlled Amplifiers VCA are responsible of the control of dynamics in the CLE 4 0 The operating range of our VCA is more than 60dB This mean that the input level or the output level can be in a increased or decreased range of 60dB Signals below the set threshold will not be reduced so the dynamic as the control will be activated as soon sign...

Page 9: ...uld use a Ratio of 4 1 or lower With the SKC circuit Smart Knee Control you can avoid aggressive compression generated by using high ratios How we achieve this Introducing a soft knee curve in the range of up to 10dB above the threshold level Hard Knee compression is then used beyond this range Output Hard Knee Threshold Gain 0 dB Ratio 2 1 Ratio 4 1 Limiter 1 SKA Curve Input Chart 3 SKA character...

Page 10: ...ut signal The area in between the two is the amount of gain reduction The unit will activate the limiter when the signal exceeds the threshold for more than 20 microseconds Then 1 second after that the signal is below threshold again reduction goes back to 0dB and in this case input and output signals are again identical 5 INSTALLATION AND CONNECTION 5 1 Mains Connection CLE 4 0 is provided with d...

Page 11: ...pressor Limiter on high temperature devices such as power amplifiers etc to avoid overheating Pic 4 Pic 5 For XLR connector XLR Type Unbalanced XLR Type alanced B Pin3 Pin2 Pin1 Linked to Pin1 manually Pin1 Pin2 Pin3 Tip Ring Sleeve Tip Ring Sleeve Tip Sleeve Tip Sleeve Tip Sleeve Cent e r Cent e r Centre Screen Screen Screen 1 2 3 Tip Ring Sleeve 1 2 3 1 2 3 TIP SLEEVE TIP SLEEVE TIP RING SLEEVE ...

Page 12: ...itches input and output for the level meter Linking CH1 master and CH2 CH3 master and CH4 stereo operation 6 TECHNICAL SPECIFICATIONS 4dBu 10dBv 55dB 1KHz COMPRESSOR SECTION PEAK LIMITER SECTION FUNCTION SWITCHES INDICATORS POWER SUPPLY DIMENSIONS WEIGHT POWER CONSUMPTION Type Impedance Maximum input level Type Impedance Maximum output level Bandwidth THD N IMD Noise Crosstalk Type Threshold Ratio...

Page 13: ...d LTO of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 3 During the warranty service may repair or replace this product at its own option at no charge to you for LTO parts or for labor in accordance with the right side of this limited warranty 3 4 This warranty does not apply to the damages to this product that occurred as the following conditions Nor...

Page 14: ...audio 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 Copyright 2003 Sekaku Electron ...

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