Klark teknik dn330 operators and service manual alt2

Page 2

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 deterioration in the perceived sound quality of the system Clearly this
in anunacceptable state of affairs, but fortunately yourchoice to utilise Klark Teknik equaliserproduct
will eliminate these problems, offering you unprecedented product performance coupled with the
highest frltercalibration and reliability standards in the industry.

For many years Klark Teknikhas been attire forefront of equaliser design, and have carried out detailed
research into optimumfilterresponse characteristics, including theirsonic 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 or boost the response ataparticular frequency, or overacertain bandwidth otherthan the
equaliser specified one, is required to overcome exceptionally difficultresponse anomalies or narrow
band feedback problems. When such an in stance 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 may be 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 )QE: output stage giving high drive capability.

Operation is normally fromthe mains supply with the 24VDC supply being utilised upon the failure of
the mains. Ifno 24V is available thenthe internalrelays will bypass the unitinthe eventofpowerfailure.

mmmmmmmmmmmmmmmmm

a. a. m flr at m m m rir m m

/I-