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The DN370B from Klark Teknik is a dual-channel, thirty-band, third-octave graphic equalizer, with long-throw, forty-five millimeter faders, two high- and low-pass filters per channel, and two-notch filters per channel. All production units share a sonic consistency, allowing engineers all over the world to replicate their favorite settings on locally sourced machines.
Aside from the main filters, the unit sports two high- and low-pass filters per channel, and two-notch filters per channel. Low and high frequency limits can thus be set-up for the system, while the notch filters with 18dB/octave slopes can be used for precise removal of problem frequencies with minimal effect on the rest of the program material.
The unit utilizes proportional-Q filtering, which varies the "Q" value depending on the depth of either the cut or boost of a particular band. This results in a "smooth" and "musical" response, while still preserving the original source material. Both inputs and outputs are balanced. The internal power supply automatically adjusts itself to various voltages, from 100 to 240VAC.
Dual-channel, 30-band 1/3 octave graphic equalizer with long throw 45mm oil damped faders
Proportional-Q filters provide optimum control without undesirable audio artifacts
Covers ISO frequencies between 25Hz and 20kHz
Gain control with +6dB/-infinity range and centre detent at unity gain. Allows effective muting of channel in emergencies
Scale switching provides the choice of either high fader resolution (+/-6dB) or normal (+/-12dB)
Channel bypass switch with LED indication - unit also provides automatic relay bypass in the event of power failure
Sweepable high-pass filter with 20Hz to 500Hz range sets the lower frequency limit of the system. The control incorporates a push switch to select the filter in and out, with an illuminated ring for "at a glance" status indication. Invaluable for smooth rejection of unwanted subsonic and low frequencies, particularly relevant with modern, compact wedge monitors
Sweepable low-pass filter with 2kHz to 20kHz range sets the upper frequency limit of the system. The control incorporates a push switch to select the filter in and out, with an illuminated ring for "at a glance" status indication. Provides optimum bandwidth control for vocal monitors and IEM systems
Two sweepable notch filters per channel, with overlapping frequency ranges of 20Hz to 2kHz, and 200Hz to 20kHz. These allow precise removal of problem frequencies with minimal effect on the rest of the program material, and fast control of "between fader" frequencies. This gives precise control of room and loudspeaker resonance/feedback nodes with minimum loss of energy even between ISO centres. The controls each incorporate a push switch to select the filter in and out, with an illuminated ring for "at a glance" status indication
Equalization by-pass allows easy comparison between direct and equalized signals
Multi point clip monitoring. Clip warning LEDs illuminate when the level exceeds +20dBu (2dB below the onset of clipping) to assist in optimum system gain setting
Earth lift switch enables signal and chassis grounds to be isolated, eliminating ground-loop problems
Electronically balanced inputs and transformer balanced outputs
Signal present LEDs and LED clip indicators assist in optimum system gain setting and show the presence of audio signals above -40dBu
Power switch, fully recessed in the "on" position to avoid accidental operation
Universal internal power supply
In the Box
Klark Teknik DN370B - Dual Channel Graphic Equalizer with Transformer Balanced Outputs
AC Power Cable
Three (3) Year Warranty
Table of Contents
Graphic, with proportional-Q filtering
Number of Channels
2 x 30
2 x XLR 6-pin Phoenix
Maximum Input Level
2 x XLR 6-pin Phoenix
Minimum Load: 600Ω Source: <60Ω
Maximum Output Level
+22dBu into 2kΩ
+/-6dB or +/-12dB, selectable
Infinity to +6dBu
20Hz to 20kHz, +/-0.5dBu
>112dB (20Hz to 20kHz unweighted), +/-12dB range
THD + N
<0.003% @ 1kHz, +4dBu
+20dBu overload indicator
100~240VAC, 50/60Hz <60W power consumption
19 x 8 x 5.25" (483 x 205 x 133mm)
12.8 lb (5.8kg)
12dB per octave high- and low-pass filters Notch filter attenuation >18dB with Q=32