Klark teknik dn320 operating and service manual

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Audio engineering
like no other
in the world

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-_._.,-., 1

Introduction

The equaliser is avital component in any audio system The entire signal passes through it and so any
limitations imposed by the equaliser will compromise the performance of the whole system, For
example, an indifferently designed equaliser may introduce severe phase distortion, noise and other
anomolies related to centre-frequency accuracy, filter shape and attenuation accuracy which may
manifest themselves as an overall deteriorationinthe perceived sound quality of the system Clearly this
in anunacceptable state of affairs, but fortunately your choice to utilise Klark Teknik equaliser product
will eliminate these problems, offering you unprecedented product performance coupled with the
highest filter calibration and reliabilitystand ards inthe industry.

For many years Klark Teknik has been atthe forefiont of equaliserdesign, and have carried out detailed
research into optimum filter response characteristics, including their sonic performance.

The Series 300 range of equalisers is a direct result of this research. It shouldbe noted that equalisation
cannot always overcome all frequency response related problems. There are applications where the
ability to cut or boost the response at aparticular fiequency, or overa certain bandwidth other than the
equaliser specified one, is required to overcome exceptionally difficult response anomalies or narrow
band feedback problems. When such an instance is encountered, it may be more appropriate to use
the greater range of control provided by a parametric type equaliser, where the centre frequency,
bandwidth and amplitude are all controllable.

When using an equaliser remember that the need to use large amounts of boost or cut within the
equalisation curve indicates that there maybe somethingfimdamentally wrongwiththe sound system
or room acoustics, which should be firrther investigated and corrected before final equalisation is
applied.

Both the input and output circuitry is electronicallybalanced. The input is voltage and current matched
and gives exceptional noise, distortion and CMRperformance, whilethe outputcircuitry is based on
the Nfidas XL3 output stage giving high drive capability.

Operation is normallyfiom the mains supply with the 24VDC supplybeing utilised upon the failure of
the mains. If no 24Vis available then the internal relayswill bypass the unit in the event of power failure,