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INTRODUCTION
Designed to meet and exceed the needs of the recording, broadcast, installation and live sound
industries, the Klark Teknik DN3600 Programmable Graphic Equaliser is an extremely high
quality, digitally controlled, two-channel, third-octave equaliser that combines state-of-the-art
audio performance with unprecedented ease of use. The two channels may either be used
independently or linked for stereo use. To further extend the flexibility of the equaliser, the unit
also incorporates variable frequency low and high-pass filters, two notch filters with variable
frequency and depth and overall gain adjustment.
Featuring a very large backlit LCD display window, the DN3600 may store up to 66 equaliser
programs and the inclusion of a Pro MIDI interface enables several other DN3600s or DN3601
slave units (64 maximum) to be controlled from a single DN3600. The slave units are electrically
identical to the DN3600 but have limited control and display facilities. A 16-pin connector is
provided for use in conjunction with the DN60/DN6000 Real Time Spectrum Analyser enabling
room analysis and equalisation to be accomplished automatically.
The proprietary analogue filters are based around the Klark Teknik “MELT” hybrid filter circuits
which offer far greater headroom and dynamic range than is possible using standard 20-bit linear,
digital systems. Benefiting from revised circuitry, these filters are exceptionally reliable and
offer greater stability than discrete designs. They are also relatively immune to electromagnetic
interference, unlike coil-based filters. Separate supply rails are used for the digital and analogue
circuitry which, in combination with rigorous internal screening, ensures the cleanest possible
audio signal path.
In order to provide maximum operational flexibility, the system includes a switchable Q mode.
The Low Q setting (Q:360) provides an accurate emulation of the industry-standard DN360
equaliser. In High Q mode (Q:27), the performance emulates the DN27.
To maintain the optimum signal to noise ratio and headroom at all equaliser settings, the gain
control acts on the equaliser sections themselves rather than being a simple pre or post-
equalisation gain stage. Additionally, an Auto gain mode is included in the system which
automatically scales the gain of the individual equaliser bands as cut or boost is applied to reduce
the risk of accidental clipping and to maintain a safe working headroom.
Both the input and output circuitry is electronically balanced with a nominal operating level of
+4dBu. The output circuitry is based on the Midas XL3 output stage, giving exceptionally high
drive capability. A transformer option is available for both inputs and outputs.