Used Klark Teknik DN370 Dual Channel 30-Band 1/3 Octave Graphic Equalizer with 45mm Faders and Balanced Outputs, 3U Rack Space

The all-new KLARK TEKNIK DN370 is the latest evolutionary step in a process of design refinement that goes back over 30 years. With DN370 they have started from the ground up and produced a unit that is totally without compromise and one that they believe is the finest professional graphic equalizer in the world today. It also perfectly complements the existing KLARK TEKNIK range of equalizers, both analogue and digital. Their aim is simply to provide discerning professional users with the best possible solutions for system control.

Our market research shows that the graphic equalizer is still the most commonly-used EQ device in fixed and mobile live sound applications, as well as many installations, mainly because the physical user interface provides instant access and controllability in even the most demanding environments. To this end they have completely re-evaluated the role of the graphic EQ, focusing exclusively on providing a new feature set that better reflects the needs of modern users. Like all KLARK TEKNIK units, DN370 is engineered for a lifetime of hard use and carries their 3-year international factory warranty." • Enhanced Proportional-Q equalization provides both smooth contouring EQ and High-Q notches

• Swept high-pass and low-pass filters per channel with illuminated LED rings
• Two overlapping high-precision swept notch filters per channel with illuminated LED rings
• Channel bypass and graphic EQ range selection switches
• Long-throw 45 mm oil-damped faders with dust covers for increased accuracy and reliability
• Power-off bypass relays with recessed power switch to avoid accidental operation
• Electronically balanced inputs and outputs on NEUTRIK XLR and Phoenix connectors
• Rugged 3U rackmount chassis for durability in portable applications
• Auto-ranging universal switch-mode power supply
• Designed and engineered in England

DN370 Architect's & Engineer's Specification
The equalizer shall provide +/-12dB of boost and cut at 30 1/3 octave ISO center frequencies from 25Hz-20kHz, selectable to +/-6dB for increased fader resolution. The equalizer shall allow have one adjustable second-order low pass filter and one adjustable second-order high pass filter per channel and two adjustable overlapping notch filters per channel. The unit shall have an equalization section by-pass and shall be fail-safe, that is the unit shall return automatically to the by-pass condition in the event of power supply interruption.

Each equalizer shall use center-detented slide potentiometers arranged to give a graphical display of frequency plotted against level. The slide potentiometers shall have protective covers to inhibit the ingress of dirt and dust. All audio connections shall be electronically balanced and use XLR and Phoenix style connectors. Input and output transformers shall be available as an option. The unit shall be capable of operating from a 100-240V +/- 10% 50/60Hz a.c. power source. The equalizer shall be the KLARK TEKNIK Dual Channel model DN370 and no alternative specification option is available.