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Introduction
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 is 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 can achieve 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 is 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 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 is necessary, a
Peak clipper can be switched in, the threshold of which tracks the Limiter.
The DN500 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 is
available for operation of the Compression and Expansion functions of both channels of the unit from the
controls of channelA.
The DN500 Dual Compressor/Limiter/Expander is built to Klark Teknik's 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.
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