DN370 Graphic




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 we’ve started from the ground up and produced a unit that is totally without compromise, and one that we believe is the finest professional graphic equaliser in the world today. It also perfectly complements the existing KLARK TEKNIK range of equalisers, both analogue and digital.

Our aim is simply to provide discerning professional users with the best possible solutions for system control. Our market research shows that the graphic equaliser 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 we 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 our 3-year international factory warranty.

Configuration Data

  • Enhanced Proportional-Q equalisation 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 equaliser shall provide ±12dB of boost and cut at 30 1/3 octave ISO centre frequencies from 25Hz-20kHz, selectable to ±6dB for increased fader resolution.

The equaliser shall meet or exceed the following performance specifications:

Frequency Response ± 0.5dB (20Hz-20kHz)
Distortion (THD+N) <0.003% @1kHz, +4dBu
Dynamic Range >114 dB (20Hz-20kHz unweighted, ±12 dB range)

The equaliser 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 equalisation 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 equaliser shall use centre-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 equaliser shall be the KLARK TEKNIK Dual Channel model DN370, and no alternative specification option is available.

DN370 Technical Specifications

Inputs Two
Type Electronically balanced (pin 2 hot)
Impedance (Ω) 20k
Maximum input level +22dBu

Outputs Two
Type Electronically balanced (pin 2 hot)
Minimum load impedance 600 Ω
Source impedance <60 Ω
Maximum output level +22dBu into >2kΩ

Frequency response relative to signal at 1kHz ±0.5 dBu 20Hz-20kHz
EQ out ±0.5 dBu
EQ in (flat) ±0.5 dBu
Distortion (THD+N) < 0.003% @ 1kHz +4 dBu
Dynamic range >114dB (20Hz-20kHz unweighted, ±12dB range)
Overload indicator +20 dBu
Gain – ∞ to +6dBu
Equalisation 30 Bands
Centre Frequencies To BS EN ISO 266:1997 25Hz-20kHz, 1/3 octave tolerance ±5%
Maximum Boost/Cut ±12dB, ±6dB
High Pass Filter Slope 12 dB/octave
Low Pass Filter Slope 12 dB/octave
Notch filter attenuation >17dB

Audio 3-pin XLR and 6-pin Phoenix
Power 3-pin IEC

Power Requirements
Voltage 100V-240V a.c.
Consumption <60W

Height 133mm (5.25 inch) (3U High)
Width 482mm (19 inch)
Depth 205mm (8 inch)

Nett 5.8kg
Shipping 7.0kg

Input and output balancing transformers

Trade Descriptions Act: Due to the company policy of continuing improvement, we secure the right to alter these specifications without prior notice.