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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.

Do not install this unit in a location subjected to excessive heat, dust or mechanical vibration.

Connection is made by means of an IEC standard power socket. The 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 is as
indicated on the rear panel, adjacent to the fuse holder.

This unit is 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.

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.

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).

Precautions

Voltage Selection and Power Connection

Safety Warning

Attention! Cables

Electric Fields:

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The Klark Teknik DN500

Summary of Contents for DN500 Plus

Page 1: ...knik Group Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Email sales ktgplc com Website www klarkteknik com OPERATORS MANUA...

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Page 3: ...stoves or other apparatus that produceheat 9 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 A grounding type pl...

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Page 5: ...k Teknik Group UK PLC Walter Nash Road Kidderminster Worcestershire DY11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Company Registration No 2414018 abc abc SIGN A L P ROC ES S IN G BY D EFIN IT...

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Page 7: ...Using the DN500 13 Compression Expansion and Limiting together 20 Application notes Technical Specification 25 Front panel controls 7 Rear panel controls 8 14 Setting the Controls 15 17 Setting the Co...

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Page 9: ...ad 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 removecovers Referservicingtoqualifiedpersonnelonly This pro...

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Page 11: ...ty control inspection and every possible effort has been made to ensure that it left the factory in perfectcondition If however the unit shows any signs of damage please notify the transportation comp...

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Page 13: ...he DN500 offers variable ratio expansion which can be used to increase subtly the dynamicrangeof asignal or toactasaconventionalnoisegate or offeranydegreeof expansioninbetween To control signal peaks...

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Page 15: ...levels 4 sets the time taken for compression to commence after the threshold is exceeded from 0 05 milliseconds 50 microseconds to20 milliseconds 5 determines the time taken for the gain to return to...

Page 16: ...esholdlevel adjustablefrom40 millisecondsto2seconds 13 Attack is a switched control offering either automatic signal monitored setting of Expander attacktimeorafixedvalueof2milliseconds 14 is the outp...

Page 17: ...theunit Mains mains fuse Voltage selector switch Note Units for the Japanese market do not have an accessible mains voltage selector switch and are set for 100V operationonly 22 Signal is madeviaafema...

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Page 19: ...e available and may be retrospectively fitted Please contact your Klark Teknik representative for more information The output circuitry is capable ofdrivinga600 ohmloadatalevelof 22dBu 2 1 3 1 2 3 2 1...

Page 20: ...y Transformer or electronically balanced connections have the benefit of Common Mode Rejection which eliminates externally induced interference such as mains hum etc Balancing is especially useful whe...

Page 21: ...Almost always it is necessary to compress the dynamic range of natural sounds to fit them into a window suitablebothfor theequipmentandfor comfortablelistening Although the dynamic range of the progr...

Page 22: ...helevelofavocalmayvarywidely andappearliketheunprocessed signalinthediagram The unprocessed signal has a large dynamic range between the highest and lowest levels Applying compression reduces the high...

Page 23: ...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...

Page 24: ...release time will mean that the gain will stayatitsreducedlevel onlyrecoveringgradually The setting of the correct release time is a compromise If the release time is too short background noise can ca...

Page 25: ...arder action of anoisegate The unprocessed signal has a fairly narrow dynamic range between the highest and lowest levels Expansion makesthelowerlevelslowerstill increasingthedynamicrange Used as an e...

Page 26: ...gate The light bar graph indicatestheamountof gainreductiontakingplace sets the time the Expander takes to respond once the signal has passed below the threshold This can be done automatically the ci...

Page 27: ...te control over peak levels is required a Peak Clipper may be switched in acting in effect as a compressor witharatioof infinity 1andaninstantaneousattacktime sets thelevelabovewhichlimiting or slippi...

Page 28: ...ed also to clean up thesignal TheLimiter Clipperwillcontrolanyunwantedpeaks Theresultisthree stagedynamiccontrolover gainwiththreedifferentthresholdlevels In the mid range of levels the signal is unal...

Page 29: ...signal chain its operation is unaffected by the use of any of the console controls except Input Gain An alternativeisconnectiontothegroup insertpointof theconsole This connection has two uses the inpu...

Page 30: ...pander 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...

Page 31: ...cond channel is equalised so that high frequencies in the sibilant range are boosted This channel is fed via an auxiliaryoutputtotheCompressor SideChaininput Now the Compressor will react whenever the...

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Page 33: ...ut Noise 94dBu 20Hz 20kHz unweighted Threshold 30dB to 20dB Ratio 1 1 to 50 1 Knee 1dB hard to 40dB soft Envelope switchable auto attack and release controls disabled Attack 90 capture 0 05ms to 20ms...

Page 34: ...ittable and has to be specified with order Security cover Transformer input output balancing Input transformer balancing is non retrofittable and has to be specified with order Parts Number Perspex se...

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