The Use of Graphic Equalisers

Equalisers may be used for corrective or creative purposes and the Klark Teknik DN360 is applicable in both live sound and studio applications.

For studio use, a pair of 1/3 octave equalisers might typically be used to compensate for deficiencies in the control room acoustics and in this instance, the precision allowed by 30 bands is a great advantage. Because it is almost impossible to set up an equaliser accurately without first analysing the room response, the centre frequencies of the filters have been chosen to correspond with those of the Klark Teknik spectrum analyser, the DN6000. In this way the readings can be transferred directly from the analyser to the equaliser.

It must be stressed however that even a good equaliser doesn't offer a complete solution where the room has severe, inherent acoustic problems. For example, standing waves and resonances cannot be made to disappear simply by using equalisation. True their effects can be reduced, but in a critical listening environment such as a studio control room or concert hall, efforts must be made to minimise these problems at source before equalisation is employed. Also, equalisation cannot overcome the lack of sound clarity caused by rooms with unduly long reverberation times though they may be able to effect some improvement in the intelligibility.

On the other hand, the sound company who may well have to set up in different venues night after night have little or no control over the acoustics of the buildings and so have to use equalisers to arrive at a compromise solution. Depending on the room, some compromises will be more successful than others. Again, effective use of the equaliser means employing the services of a spectrum analyser. It is however not always desirable to achieve a dead flat room response. For example, applying substantial amounts of bass boost to try and restore a weak bottom end is going to use up large amounts of amplifier power and the extra loudspeaker cone excursions so caused will rob the system of headroom and may cause distortion. The harmonics produced by an amplifier driven into clipping may also damage the high frequency drivers and will at any rate sound unpleasant

Therefore, reducing the low frequency output may produce real advantages by way of improved intelligibility and subjective naturalness and this is particularly true of buildings made from concrete or stone where much of the bass is reflected rather than absorbed. Equally, rolling off the high frequency end above 5kHz may also contribute to a more natural sound. The resulting house curve then is far from flat but may will be the ideal compromise. Depending on the individual sound system and the environment, the shape of the optimum house curve will vary and a degree of experience is needed in order to achieve the best results. It should also be borne in mind that the ideal house curves for pure speech and music will not be the same.

+10

 

 

0

 

 

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-10

 

 

-20

 

 

100

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10k

Frequency Hz

Typical House Curve

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Klark Teknik DN360 manual Typical House Curve, Use of Graphic Equalisers
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DN360 specifications

The Klark Teknik DN360 is a legendary graphic equalizer that has made its mark in the world of sound engineering and music production. Renowned for its robust construction, precise sound manipulation, and intuitive usability, the DN360 is a staple in professional audio environments, including live sound reinforcement, recording studios, and broadcast facilities.

One of the standout features of the DN360 is its 30-band graphic equalization, which operates over a range of 20 Hz to 20 kHz. This extensive frequency range allows sound engineers to make finely tailored adjustments to audio signals, ensuring each frequency can be enhanced or attenuated to meet the specific needs of any performance or recording situation. The equalizer provides a 1/3 octave frequency spacing, which is critical in facilitating detailed control over audio content without introducing unwanted phase issues.

The DN360 employs advanced circuit design and high-quality components to ensure impeccable audio fidelity. One of its key technologies is the use of low-noise, high-performance circuitry, which contributes to the clarity of sound even at extreme levels. The equalizer also integrates an innovative feedback detection system, which helps in preventing feedback issues when used in live applications, a common challenge faced by audio professionals in dynamic settings.

In addition to the powerful equalization capabilities, the DN360 is designed with user-friendliness in mind. The layout features an intuitive front panel, making it easy for sound engineers to make quick adjustments during performances. The LED-level meters provide clear visual feedback, allowing for real-time monitoring of audio levels.

Another notable characteristic of the Klark Teknik DN360 is its rugged construction, which is essential for durability in demanding environments. The unit is housed in a sturdy metal chassis that can withstand the rigors of touring and frequent use, ensuring longevity and reliability.

The DN360 also offers a variety of connectivity options, seamlessly fitting into different professional audio setups. Balanced XLR inputs and outputs are provided, ensuring a clean signal path and minimal interference. Furthermore, the equalizer supports both stereo and dual-mono operation modes, enhancing its flexibility in various audio applications.

Overall, the Klark Teknik DN360 stands as a testament to innovation in audio processing equipment, delivering unmatched performance and versatility for professionals in the audio industry. Whether in a studio or on the road, it is a powerful tool for achieving sonic excellence.
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