OPERATORS MANUAL
Contents
1. 3 Dimensions Width 482mm 19 inch Depth 292mm 11 inch Height 44 5mm 1 inch Weight Nett 4 kg Shipping 6kg Options Security Cover Transformer Input Output balancing Input transformer balancing is non retrofittable and has to be specified with order Options Security cover Transformer input output balancing Input transformer balancing is non retrofittable and has to be specified with order Options Ordering Information Parts Number Perspex security cover DR ze Model No Aluminium security cover SOA re Model No Output balancing transformer BU37 Input balancing transformer BN37 262. a jet engine on take off The human ear has an automatic gain control which enables it to accommodate all of these sounds from the threshold of hearing to close to the threshold of pain a dynamic range of approximately 120 decibels Even the most modern audio equipment 1s incapable of handling the full range that the ear can cope with Analogue tape without noise reduction can manage almost 70 decibels dynamic range between its noise floor and the 3 distortion point 16 bit digital audio equipment can achieve over 90dB Still almost 30dB less than the ear s range Even if a 120dB dynamic range were possible in audio equipment would it be desirable and useful A listener in a domestic setting enjoying the exhilarating effects of a 96dB Sound Pressure Level will almost certainly be causing his neighbour a significant amount of annoyance if not distress At the other end of the dynamic scale a typical ambient noise level of at least 40dB SPL precludes the use of very quiet levels in recorded or broadcast sound media Almost always it is necessary to compress the dynamic range of natural sounds to fit them into a window suitable both for the equipment and for comfortable listening Although the dynamic range of the programme material must fit into a 30 to 40dB window there is another factor in the equation noise All the sounds that we want to listen to whether natural or electronically processed are accompanied by a certain amount of unwanted b
3. purchaser installer or user 1s drawn to special limitations of use which must be observed when these products are taken into service to maintain compliance with the above directives Details of these special measures and limitations to use are available on request and are available in product manuals A Subsidiary of Telex communications Inc Klark Teknik DN500 After you have unpacked Introduction Instrument Familiarisation Front panel controls Rear panel controls Audio Connections Using the DN500 Compression Setting the Controls Expansion Setting the Controls Limiting Compression Expansion and Limiting together Application notes Linking to the Console Using the Side Chain De essing Technical Specification Uda 11 13 14 15 17 19 20 ZA 23 25 KLARK 3 000000 RLARR 4 Se The Klark Teknik DN500 HLARR TE Thank you for selecting the Klark Teknik DN500 Plus dual compressor limiter expander The unit continues the Klark Teknik tradition of providing superb audio performance technical accuracy and rugged reliability Precautions Do not install this unit in a location subjected to excessive heat dust or mechanical vibration Voltage Selection and Power Connection p Connection is made by means of an IEC standard power socket The
4. compressor sound used as an effect in its own right Higher ratios are used for the control of extremely peaky signals The point where the slope of the Compressor curve changes 1s knows as the Knee The DN500 Plus has an adjustable knee variable between Hard and Sof Hard Knee Soft Knee 10 1 10 1 1 1 1 1 Increasing signal level Increasing signal level Diagram3 15 Z HLARK TE With a soft knee signals which only just exceed the threshold level are compressed at a low ratio the ratio increasing the higher the signal level E 3 Attack sets the time the Compressor takes to respond once the threshold has been exceeded Attack may be set so that the initial transient of the instrument passes through unaltered or set to a faster value so that the very start of the sound is compressed Particularly with drum sounds careful adjustment of attack time can make the sound more punchy and driving Release time plays a very important role in compression During periods of high signal level gain is reduced When the signal level falls below the threshold the gain will increase at a rate determined by the Release control Ifthe release time 1s short the gain will rise quickly A long release time will mean that the gain will stay at its reduced level only recovering gradually Signal Envelope Fast release Slow release Diagram 4 The setting of the correct release time 1s a
5. high standards of design and construction A well thought out aesthetic presentation is also an aid to realising full dynamic control over gain in today s complex productions KLARK T D BYPASS 0 12 Instrument Familiarisation Front Panel Ci RLARK 30 15 13 17 18 LIMIJER EXPANDER Ay Pl STEREO C MPIN EMVAUTOMAN GR 30 20 15 12 9 6 3 1 GR1 10 20 30 OP 20 10 0 10 HKPIN Afk AUTO 2ms LIM CLIPPER IN m SLAVE is POWHR 3 12 15 5 150 500 1e 12 0 m 0 20 gt 30 2 1 55 16 4 a 25 5 25 EE ml 5 50 40 2s 10 m s The DN500 Plus Dual Compressor Limiter Expander consists of two identical channels each with separate Compressor Expander and Limiter sections Compressor l Threshold determines the level above which gain reduction compression will take place variable from 20dBu down to 30dBu The Gain Reduction light bar graph meter indicates in decibels by how much the signal is compressed at any instant Ratio sets the degree of compression applied above the threshold level variable from 1 1 to 50 1 A ratio of 1 1 corresponds to zero compression Signal In Signal Out A ratio of 10 1 indicates that when the input signal above the threshold rises in level by 10dB the output level will rise 1dB Knee calibrated
6. page 11 of this manual 24 Expander Side Chain Input is made via a 4 inch type A stereo jack connector 2 Compressor Side Chain Input is made via a inch type A stereo jack connector 26 Always guote the Serial Number in any correspondence concerning the unit 10 KLARK 3 2 Audio Connections ELARRE aii Input The input circuit is a transformerless electronically balanced design which achieves a symmetry of better than 50dB from 20Hz to 10kHz If transformer balancing of the input is required this must be specified at the time of order It is not retrofittable Output The standard output is unbalanced but balancing transformers are available and may be retrospectively fitted Please contact your Klark Teknik representative for more information The output circuitry is capable of driving a 600 ohm load ata level of 22dBu Input Unbalanced Balanced 1 Gnd 1 Gnd 2 Gnd 2 Cold 3 Hot 3 Hot Output Unbalanced Balanced 1 Gnd 1 Gnd a gt 2 Gnd 2 Cold l 3 Hot 3 Hot ap amp Pin 2 Pin 3 Hot Operation The unit is configured for pin 3 hot operation but can be re configured to the standard pin 2 hot XLR wiring convention This is done by changing the internal jumpers located next to the connectors on the PCB from a horizontal to a vertical configuration as illustrated below Please contac
7. reduction in signal dynamic range On Manual the rotary Attack and Release controls come into operation E 3 Expander 10 Threshold determines the level below which gain reduction will take place variable from 20dBu down to 40dBu Gain reduction BELOW a threshold level constitutes dynamic range EXPANSION The Gain Reduction light bar graph meter indicates in decibels by how much the signal is expanded at any instant 11 Ratio sets the degree of expansion applied below the threshold level variable from 1 1 to 25 1 A ratio of 1 1 corresponds to zero expansion Signal In Signal Out Aratio of 10 1 indicates that when the input signal below the threshold falls in level by 1dB the output level will fall 10dB 12 Release determines the time taken for the gain to return to normal after the signal comes back above the threshold level adjustable from 40 milliseconds to 2 seconds 13 ATK Attack is a switched control offering either automatic signal monitored setting of Expander attack time or a fixed value of 2 milliseconds 14 Gain is the output level control for the entire channel Compressor Expander and Limiter The output level light bar graph meter indicates OUTPUT level when the channel is switched in circuit When the channel 1s bypassed the meter indicates INPUT level 15 EXP In selects the expansion effect to be in or out Limiter 16 Threshold sets the level above which the
8. 7 KT RLARR TERNI Walter Nash Road Kidderminster Worcestershire DY11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Company Registration a 2414018 KLARK 31 TWI SIGNAL PROCESSING BY DEFINITION A _ f Base Em DECLARATION OF CONFORMITY We Klark Teknik Group UK PLC of Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY 11 7HJ Declare that a sample of the following product Product Type Number Product Description Nominal Voltage s Current Freq DN500 Plus Dual Compressor 115V AC 200m A 50 60Hz Limiter Expander 230V AC 100mA to which this declaration refers is in conformity with the following directives and or standards Directive s Test Standard s 89 336 EEC Electromagnetic Compatibility Directive amended by 92 31 EEC amp 93 68 EEC 73 23 EEC Low Voltage Directive amended by 93 68 EEC Generic Standard Using EN55103 Limits and Methods EN50081 1 Class B Conducted Emissions Pavi EN55103 Class B Radiated Emissions Pavi EN55103 Fast Transient Bursts at 2kV EN61000 4 4 Static Discharge at 4kV EN61000 4 2 Electrical Stress Test EN60204 Electrical Safety UL6500 99 EN60065 1998 E60065 00 ae a Date 15th September 2003 Name Simon Harrison Authority Research and Development Director Klark Teknik Group UK PLC Attention Where applicable the attention of the specifier
9. DNS00 OPERATORS MANUAL Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY 11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Email info uk telex com Website www klarkteknik com DN500Plus Dual Compressor Limiter Expander Operators Manual DOC02 DN500 Issue 1 1 September 2004 c Telex Communications UK Ltd In line with the company s policy of continual improvement specifications and function may be subject to change without notice This Operators Manual was correct at the time of writing E amp OE AT TENDI SIGNAL PROCESSING BY DEFINITION 10 IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR These symbols are internationally accepted symbols that warn of potential hazards with electrical products The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons the user to the presence of important operating and maintenance The exclamation point within an equilateral triangle is intended to alert M servicing instructions in the literature accompanying the applian
10. ackground noise tape hiss or the rustle of musicians turning the pages of the score in the studio Even if in the final programme the noise level is below the ambient noise of the listening area it may still be heard and is therefore undesirable The Compressor Limiter and the Expander are valuable tools for the control of dynamic range and reduction of noise Compression reduces the dynamic range of any instrument or programme source Expansion has the effect of subjectively reducing or eliminating background noise Compression and expansion have their artistic uses too The sounds of instruments and voices can be altered A mix of instruments can be compressed to give a tighter dynamic effect Or a previously over compressed recording can have life put back into it by the subtle use of expansion The DN500 Plus Dual Compressor Limiter Expander offers in a compact unit virtually complete control over dynamic range for corrective and for artistic purposes 13 OHLARK I One of the principal uses of compression 1s the control of level in vocals Many singers train for years to achieve the degree of breath control necessary for an even tone and expressive performance Other vocalists rely on an instinctive voice production technique which may need help in the studio to maintain a consistent level and result in a vocal track which sits correctly in the mix The level of a vocal m
11. almost undetectable dynamic range reduction by the use of sophisticated automatic attack and release circuitry Or compression can be used as an effect in its own right with full manual control over Threshold Ratio Attack and Release There 1s also a fully adjustable Knee control which provides an infinite range of compression styles from Hard to Soft easy compression As an expander the DN500 Plus offers variable ratio expansion which can be used to increase subtly the dynamic range of a signal or to act as a conventional noise gate or offer any degree of expansion in between To control signal peaks a Limiter is provided on each channel totally independent of the Compressor and with a fully adjustable Threshold control For situations where absolute control over peaks 1s necessary a Peak clipper can be switched in the threshold of which tracks the Limiter The DN500 Plus has light indicators for every switched audio function and also has separate gain reduction light bar graph meters for compression and expansion on each channel There are also peak limiting light indicators and output level light bar graph meters for each channel Separate side chain inputs are provided for the Compressor and Expander sections A stereo link function 1s available for operation of the Compression and Expansion functions of both channels of the unit from the controls of channel A The DN500 Plus Dual Compressor Limiter Expander is built to Klark Teknik s
12. annel 2 to group K K r P nnn nR RnR Rna R as 4 fe een ja a aja ja ja n a aa ae ae Aa a a Compressor side sedne WE z Eon K Akon ak chain input per te re rer rar Tarr pogo ge ge gC ES ray Ya tt 7 T a i Diagram 10 The microphone channel is routed to a group with the Compressor patched into the group insert points The microphone channel is also parallelled into another channel via the line input The signal in the second channel is equalised so that high frequencies in the sibilant range are boosted This channel is fed via an auxiliary output to the Compressor Side Chain input Now the Compressor will react whenever there is a sibilant reducing the gain for the duration of the sibilant and cleaning up the vocal sound This technique can also be used to compensate for a boomy bass or other situations where a band of frequencies 1s occasionally obtrusive The DN500 Plus Dual Compressor Limiter Expander offers a unique combination of dynamic gain control processors Engineers will find it a powerful tool in recording broadcast and post production studios and in sound reinforcement systems 2 24 KLARK 3 DNS5002 Technical Specifications COMPRESSOR BYPASS STER GR 30 20 15 12 9 6 3 1 GR 1 10 20 30 OP 2 j IA 0 12 DE dB Har THRESH RATIO KNEE ATTACK SUPPLY VOLTAGE i ae n AC50 60H7 30W 5x20m TO 5L250V O m O Audio Inputs Typ
13. ay vary widely and appear like the unprocessed signal in the diagram Threshold level Signal Level Unprocessed signal Time gt l 6 S D 0 Threshold level 3 1 Compression above threshold Time gt l 6 S N With gain make up Time Diagram 1 The unprocessed signal has a large dynamic range between the highest and lowest levels Applying compression reduces the highest levels reducing the dynamic range Because the peak level of the signal is now lower make up gain is added to restore the original peak level The result is a much more controlled and usable sound 14 Compression Setting The Controls HLARK E 3 Threshold sets the level above which compression takes place Signals below the threshold will remain unaltered Turning the control clockwise lowers the threshold level and allows more of the signal to be compressed Ratio is the strength of compression above the threshold level The higher the ratio the greater the effect 20 20 Output level dB Output level dB 10 10 Input level dB 2 Input level dB o 20 10 10 20 10 10 20 10 10 20 20 2 1 12 1 Diagram 2 At a compression ratio of 2 1 the effect is mild and suitable for the subtle compression of vocals or of a complete mix At 12 1 compression is becoming stronger and more noticeable Ratios between 3 1 and 15 1 are suitable for the
14. ce Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth Do not block any of the ventilation openings Install in accordance with the manufacturers instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 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 Agrounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety Ifthe 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 11 Only use attachments accessories specified by the manufacturer 12 13 Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified personnel 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 IEC 60065 Edn
15. compromise Ifthe release time 1s too short background noise can cause effects often known as breathing and pumping If the release time is too long the signal will not be compressed but simply reduced in level For effective compression the release time must be set to as short a value as possible before modulation of the background noise becomes too noticeable The gain reduction bar graph meter will show how much actual compression 1s going on If it stays steady there is little active compression just a steady state reduction in level The faster the bar graph moves up and down the harder the Compressor 1s working For a natural unnoticeable compression attack and release times may be set to Auto The signal characteristics are continuously monitored for optimum values 16 Expansion may be used to increase the dynamic range of a signal of a performance lacking life and vigour or of a previously over compressed recording 13 Alternatively expansion can be used to reduce noise either subtly and undetectably or with the harder action ofa noise gate Threshold level Signal Level Unprocessed signal Time Threshold level gt l G D W 2 1 Expansion below threshold Time Diagram 5 The unprocessed signal has a fairly narrow dynamic range between the highest and lowest levels Expansion makes the lower levels lower still increasing the dynamic range Use
16. d as an expander the DN500 Plus may be connected in the signal chain in exactly the same manner as when used as a compressor 17 Expansion Setting the controls KLARK G Threshold sets the level below which expansion takes place Signals above the threshold will remain unaltered Turning the control anticlockwise raises the threshold level and allows more of the signal to be expanded A low threshold would be used to reduce noise a higher threshold to increase the dynamic range of a signal Ratio is the strength of expansion below the threshold level The higher the ratio the greater the effect At an expansion ratio of 2 1 the effect is mild and suitable for subtle noise reduction or dynamic range enhancement At higher ratios the effect becomes harder and more like a noise gate The light bar graph indicates the amount of gain reduction taking place Attack sets the time the Expander takes to respond once the signal has passed below the threshold This can be done automatically the circuitry continuously analysing the signal to determine optimum attack time Or it can be set to a fixed value of 2ms Release determines the time taken for the gain to return to normal after the signal comes back above the threshold level For hard gating this may be set to a short value Longer release times are suitable for dynamic range enhancement or subtle noise reduction Gain is the output
17. e Impedance ohms Balanced Unbalanced Side Chain Inputs Type Impedance ohms Balanced Unbalanced Audio Outputs Type Minimum Load Impedance Source Impedance Maximum Level Performance Freguency Response 20Hz 20kHz Distortion THD N 4dBu Eguivalent Input Noise 20Hz 20kHz unweighted Compressor Threshold Ratio Knee Envelope Attack 90 capture Release 90 recovery Expander Threshold Ratio Attack Release 90 recovery Output Gain Limiter Clipper Threshold Power Requirements Voltage Consumption Termination Audio Inputs Outputs Side Chain Inputs Power EXPANDER LIMITER 0 10 0 10 EXPIN ATK AUTO 2ms COMPRESSOR ENV AUTO MAN COMP IN GR loko Ro E 20 40 25 1 40 dB n 1 OUTPUT Two Electronically Balanced 20k 10k Two Compressor Two Expander Electronically Balanced 20k 10k Two Unbalanced 600 ohms lt 60 ohms 21dBu 0 5dB lt 0 03 1kHz 94dBu 30dB to 20dB 1 1 to 50 1 1dB hard to 40dB soft switchable auto attack and release controls disabled 0 05ms to 20ms 60ms to 2s 40dB to 20dB 15110251 switchable auto or fixed 2mS 40ms to 2s 10dB to 30dB 0dB to 20dB 100 115 230 240V 50 60Hz lt 30VA 3 pin XLR normalled 1 4 inch stereo jack 3 pin IEC 2 KLARK 10 30 dB 5 2s ms REL GAIN CHANNEL A mm NPUT 00 LARK
18. ernative sound guality which may be desirable in some cases Alternatively several instruments may be compressed together in the mix to achieve a harder sound YY Send Group Insert Point Mic Input ana eee ee eee ee eee eee ee eee LILI LIL ITA 404420 a m ee A eee ee eee eee LL AAA An EVE IE ISIS IS ISIS SS BSS S Diagram9 21 Applications Side chain inputs KLARK SS 4 N Each channel of the DN500 Plus has two Side Chain inputs one for the Compressor and one for the Expander In normal use the amount of compression or expansion is related to the dynamics of the input signal The Side Chain allows the signal passing through the unit to be controlled by the dynamics of another separate signal Connection to the Side Chain input is made via the rear panel jack sockets See Audio Connections page 12 22 A EI Applications De essing KLARE TE De essing is an important compression technique using the Side Chain Many singers have high level sibilants sss sounds which detract from their performance Equalising the signal will reduce the sibilants but also make the overall vocal sound dull The sibilants can be selectively removed by compressing only when there is an excessive level of high frequencies Here is one way to doit Aux Send Mic Input Insert Send Line In Channel routed channel 1 ch
19. from 1 to 40 adjusts the hardness or softness ofthe compression effect A hard knee means that when the input signal level rises above the threshold it is immediately compressed at the full ratio as set A soft knee means that compression will start below the threshold level at a low ratio and gradually attain the full ratio selected only at higher levels Attack sets the time taken for compression to commence after the threshold is exceeded from 0 05 milliseconds 50 microseconds to 20 milliseconds Release determines the time taken for the gain to return to normal after the signal drops below the threshold level adjustable from 60 milliseconds to 2 seconds The Bypass switch selects the whole channel to be in or out of circuit Stereo links the two channels of the DN500 Plus together so that they are both operated from the controls of Channel A apart from the Limiter sections which always work individually In stereo mode the unit still monitors the levels of both channels to detect when the signal is above the threshold level on Channel B the Stereo switch is replaced by a Stereo Slave light indicator Comp In selects the compression effect to be in or out ENV allows the setting of attack and release times to be automatic or manual On Auto the attack time of the input signal and the amount by which it exceeds the threshold level are assessed and suitable Compressor attack and release values set to give an almost undetectable
20. level control for the entire channel Compressor Expander and Limiter The output level light bar graph meter indicates output level when the channel 1s switched in circuit When the channel 1s bypassed the meter indicates INPUT level 18 The Limiter acts as a last check on signal level If the level goes over the threshold fast acting high ratio compression 1s applied to bring it back within bounds If absolute control over peak levels is required a Peak Clipper may be switched in acting in effect as a compressor with a ratio of infinity 1 and an instantaneous attack time Threshold level Signal Level Unprocessed signal Time Threshold level Signal Level Limiting Time Threshold level gt O G S N Clipping Time Diagram 6 Threshold sets the level above which limiting or slipping if selected takes place 19 x Compression Expansion and Limiting _ ELARK The act of compressing a signal inevitably causes an increase in noise level Compression reduces peak levels gain make up restores the overall level and in the process increases the level of any background noise that the signal contains Almost always when compression 1s used the Expander section of the DN500 Plus will be used also to clean up the signal The Limiter Clipper will control any unwanted peaks The result is
21. rear panel text indicates the voltage range required for satisfactory operation of the unit Before connecting this unit to the mains supply ensure the fuse fitted is the correct type and rating 1s as indicated on the rear panel adjacent to the fuse holder Safety Warning This unit 1s fitted with a standard fused IEC mains inlet For safety reasons the earth lead should never be disconnected To prevent shock or fire hazard do not expose the unit to rain or moisture To avoid electrical shock do not remove covers Refer servicing to qualified personnel only Attention Cables This product should only be used with high quality screened twisted pair audio cables terminated with metal bodied 3 pin XLR connectors Any other cable type or configuration for the audio signals may result in degraded performance due to electromagnetic interference Electric Fields Should this product be used in an electromagnetic field that is amplitude modulated by an audio frequency signal 20Hz to 20kHz the signal to noise ratio may be degraded Degradation of up to 60dB at a frequency corresponding to the modulation signal may be experienced under extreme conditions 3V m 90 modulation KLARK gt After You Have Unpacked The Unit KLARK Save all the packing materials they will prove valuable should 1t become necessary to transport or ship thi
22. s product Please inspect this unit carefully for any signs of damage incurred during transportation It has undergone stringent quality control inspection and every possible effort has been made to ensure that 1t left the factory in perfect condition If however the unit shows any signs of damage please notify the transportation company without delay Only you the consignee may institute a claim against the carrier for damage during transportation If necessary contact your supplier or as a last resort your Klark Teknik importing agent who will fully co operate under such circumstances KLARK TERMIK GROUP KIDDERMINSTER ENGLAND KLARK Introduction KLARK 3 Compression expansion limiting and peak clipping are four of the most valuable techniques available to the sound engineer Not only can they solve many problems that can arise in day to day work creative possibilities exist in abundance The Klark Teknik DN500 Plus Dual Compressor Limiter Expander integrates all of these processes into a single compact rack mounting unit with two channel operation Complete dynamic control over gain 1s the result and also control over problems due to noise in the signal chain and the distortion that may be caused by excessive peak levels As a compressor the DN500 Plus can achieve
23. signal will be limited compressed at a high 25 1 ratio adjustable from OdBu to 20dBu 17 Clipper In selects peak clipping Clipping totally eliminates transient peaks effectively acting as a limiter with an infinity 1 ratio and an instantaneous attack time The Clipper threshold follows the Limiter threshold as set 18 Power switches mains power on or off 3 Instrument Familiarisation Rear Panel Con KLARK TG SUPPLY VOLTAGE Lo ry CHANNEL A NP OUTPUT CE FUSE 4 5x20mm 10 5L250V f y 115 220 240V I AC 50 60Hz 30W S 20 21 24 2 19 Mains is supplied via an IEC standard 3 pin connector A compatible power cord 1s supplied with the unit 20 The mains fuse is located in a fuse holder fitted to the rear panel Always replace with the correct type and rating as indicated on the unit 21 Voltage selector switch This unit is switchable between two nominal supply voltages 110V and 220V viaa slide switch The switch MUST be set before the supply is connected Any attempt to run the unit from a220V supply with the switch set to 110V 1s liable to result in severe damage to the unit Note Units for the Japanese market do not have an accessible mains voltage selector switch and are set for 100V operation only 22 Signal Input is made via a female XLR type connector 23 Signal Output is available on a male XLR type connector For wiring details see
24. t your Klark Teknik service representative for further details 1f required Pin3hot G eee Pin2hot HE 11 s IN RLARR EL Side Chain EXT Key Inputs The electronically balanced Side Chain inputs are on stereo 4 inch type A jack sockets configured TIP HOT RING COLD SLEEVE EARTH Inserting a mono jack plug will automatically unbalance the input 1 4 Stereo Jack HOT COLD GND The sockets are internally normalled so that signal continuity is maintained when there is no jack plug inserted Ifthe unit 1s wired to a patchbay then normalling must be carried out at the patchbay Balanced Circuits Transformer or electronically balanced connections have the benefit of Common Mode Rejection which eliminates externally induced interference such as mains hum etc Balancing 1s especially useful when long cable runs are used between pieces of equipment Transformer balanced circuits have the added advantage of being fully floating with the earth ground or screen being totally isolated from the signal In installations where a difference in earth potential 1s likely to occur this isolation prevents earthing problems which can in some cases damage the equipment 12 4 Using the DN50079 ELARRE The natural sounds of life have an extremely wide dynamic range from the result of a falling leaf to the roar of
25. three stage dynamic control over gain with three different threshold levels 20 Output level dB Limiter Threshold Compressor Threshold Input level dB 20 10 10 20 Expander Threshgid 20 Diagram 7 In the mid range of levels the signal is unaltered Above the compression threshold in this example gain 1s reduced by a ratio of 2 1 Above the limiting threshold it is reduced by 25 1 At levels below the Expander threshold gain is reduced by 2 1 Complete control over signal dynamics is possible 20 Applications Interfacing with a console q KLARK Se 4 HP The Klark Teknik DN500 Plus Dual Compressor Limiter Expander 1s optimised for use at line level therefore to process the signal from a microphone the input to the DN500 Plus has to be taken from the console preferably from the channel insert point send The output from the DN500 Plus comes back to the channel insert return By connecting the DN500 Plus at this position in the signal chain its operation 1s unaffected by the use of any of the console controls except Input Gain Channel Insert Point P Send Mic Input mata ea aaa aaa aaa Rna ee a a A aa LI ee TSS 44 402040 aaa n a a a n aja a n a na a ala ee eee ie Diagram 8 An alternative 1s connection to the group insert point ofthe console This connection has two uses the input from the microphone may be compressed post EQ which offers an alt
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