Klark teknik dn330 operators and service manual

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Operators & Service
Manual

DN330

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Introduction

The equaliseris avital componentin 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 deteriorationin the perceived sound quality of the system Clearlythis
in anunacceptable state of affairs, but fortunately yourchoice to utilise KlarkTeknik equaliserproduct
will eliminate these problems, offering you unprecedented product performance coupled with the
highest filtercalibration and reliability standards in the industry.

For many years Klark Teknik has been atthe forefront of equaliser design, and have carried out detailed
research into opfimumfilterresponse characteristics, including their sonic performance.

The Series 300 range of equalisers is a direct result of this research. It should be noted that equalisation
cannot always overcome all frequency response related problems. There are applications where the
ability to cut orboostthe response ataparticular frequency, or overacertain bandwidth other than the
equaliser specified one, is required to overcome exceptionally difficultresponse 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 something fundamentally wrong with the sound system
orroom acoustics, which should be further investigated and corrected before final equalisation is
applied.

Both the input and output circuitry is electronically balanced. The input is voltage and current matched
and gives exceptional noise, distortion and CMR performance, while the output circuitry is based on
theMidas X13 output stage giving high drive capability.

Operation is normally from the mains supply with the 24VDC supply being utilised upon the failure of
themains. Ifno 24V is available thenthe internalrelays will bypass the unitinflaeeventofpowerfailure.

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