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.

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