DN360 OPERATORS MANUAL Klark Teknik Group, Klark Teknik Building, Walter Nash Road, Kidderminster. Worcestershire. DY11 7HJ. England. Tel:+44 1562 741515 Fax:+44 1562 745371 Email: sales@ktgplc.com Website: www.klarkteknik.
Walter Nash Road, Kidderminster, Worcestershire. DY11 7HJ. England Tel: (44) (0) 1562 741515.
THANK YOU FOR USING THIS KLARK TEKNIK PRODUCT To obtain maximum performance from this precision electronic product, please study these instructions carefully. Installation and operating the equaliser is not complicated, but the flexibility provided by its operating features merits familiarisation with its controls and connections. This unit has been prepared to comply with the power supply requirements that exist in your location.
AFTER YOU HAVE UNPACKED THE UNIT Save all the packing materials - they will prove valuable should it become necessary to transport or ship this product. Please inspect this unit carefully for any signs of damage incurred during transportation. It has undergone stringent quality control inspection and tests prior to packing and left the factory in perfect condition. If, however, the unit shows any signs of damage, notify the transportation company without delay.
Introduction The graphic equaliser is a vital component in any audio system. The entire signal passes through it and so any limitations imposed by the equaliser will compromise the performance of the whole system. For example, an indifferently designed equaliser may introduce severe phase distortion, noise and other anomalies related to centre frequency accuracy, filter shape and attenuation accuracy which may manifest themselves as an overall deterioration in the perceived sound quality of the system.
DN360 Graphic Equaliser The Klark Teknik DN360 is a dual channel, 30 band equaliser offering 12dB of cut or boost in 1/3 octave steps between the frequencies of 25Hz and 20 kHz. Filter Shape and Combining Action ISO CENTRE FREQUENCIES (in Hz) 20 31 25 50 40 80 63 125 100 200 160 315 250 500 400 800 630 2K 1.25K 1K 1.6K 5K 3.15K 2.5K 4K 8K 6.3K 20K 12.
The nature, shape and way in which individual equaliser filters combine, has a profound effect on the control provided by the equaliser and on the resulting quality of sound. The majority of applications within the sound reinforcement, broadcast and recording fields, require a smooth and continuous equalisation response curve in order to correctly contour the overall response characteristics of a sound system, loudspeaker, recording effect or audio channel.
Instrument Familiarisation Front Panel Functions The high quality faders used in this equaliser have an oil-damped action for smooth operation and feature a centre detent following accurate "flat" setting. The scale switch selects maximum boost and cut for the equaliser of either 6dB or12dB. The centre position of this switch performs the bypass function, which silently removes the graphic equaliser section from the signal path.
Specifications Input Type Impedance ( alanced Unbalanced Output Type Min. Load impedence Source impedance Max. Level Transformer balanced 20k 10k Transformer balanced 600 dBu Performance Frequency response Distortion (@ +4dBm) Equivalent input noise Channel separation Overload indicator Level Control ±0.5dB(20Hz-20kHz) <0.
B2637-6.
B2636-2.
B2610-4.
B2609-2.
B2609-2.
B2609-2.
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.
In live sound applications, graphic equalisation is almost always applied separately to the stage monitor of foldback system to reduce the level of those frequencies that would otherwise cause feedback problems. These problems came about due to peaks in the frequency response curves of the monitor speaker systems, monitor positioning, and sound reflected from the stage walls. An analyser is probably best employed to do this effectively but many experienced engineers rely on their ears.
Table 1: Effects of Equalisation on Voice Reproduction 1/3 Octave centre frequency (Hz) Effect on voice 40, 50, 63, 80,100,125, Sense of power in some outstanding bass singers. 160, 200, 250, Voice fundamentals. 315, 400, 500 Important for voice quality. 630, 800, 1k Important for voice naturalness. Too much boost in the 315 to 1k range produces a telephone like quality. 1.25 to 4k Vocal fricatives - accentuation of vocals. Important to speech intelligibility.
Equalising a Sound System When equalising a sound system you should always remember just what it is you are trying to achieve. Two fundamental reasons for equalization are:1. To increase the potential gain or power output of the system before feedback. 2. To improve the naturalness or intelligibility of the sound system.
A good idea is to rotate the measuring microphone in a wide arc or circle round the measuring position and to see if any strong interactions occur causing large deviations in response. If necessary, move to another position. Also ensure that the ambient noise level is at least 6dB (preferably 10dB) below the signal level you are using. Having set up the desired house curve as smoothly as possible, move round and check the response throughout the listening area. Good equalisation requires time and patience.
Inserting the Equaliser in the Signal Chain The exact point of insertion of an equaliser into the signal chain will very much depend on the task in hand e.g. mixer channel / line input, group insert point, group output, auxiliary send or between another signal processing device and the mixer or power amplifier, etc. when using delayed out signals for example, i.e.
Important Note: It is often useful to call your dealer or the factory explaining the nature of the problem with the unit. In many instances the problem can be solved without returning the unit to the factory. If the unit has to be returned to the factory, use original packing only. If you do not have one, we will provide replacement. Factory authorised service facilities are located throughout the world. Call your dealer or the factory for the location of the service facility nearest you.
2.0 37 2 ’’8 2. ’’’’ 790 0.0 O C ’’’’’ 704 1.9 O BA’’’’’ ’ 627 7.6 O ’’’’ 556 4.0 O GF’’’’’ ’ 527 8.6 O E’’’’ ’ 449 6.0 O ’’’’ 418 .1 O DC’’’’ 3951 0.0 O ’’’’ 352 5.9 O BA’’’’ 313 3.8 O ’’’’ 279 .0 O GF’’’’ 2637 9.3 O ’’’’ 224 .0 O E D’’’’ 2093 5.6 O ’’’ 197 .0 O CB’’’’ 1760 .0 O ’’’ 568 .9 O AG’’’ 1 396 .5 O ’’’ 1 318 .7 O F E’’’ 1 1174 .5 O D’’’ 046 O ’’ 1 87.8 O CB’’ 9 80.0 O A’’ 8 83.0 O ’’ 7 8.4 O GF’’ 69 59.2 O ’’ 6 87.3 O E D’’ 5 23.2 O C’ 5 93.9 O ’ 4 0.0 O BA’ 44 2.0 O G’39 9.2 34 .
B A 31 40 50 63 100 125 160 200 250 315 400 500 630 800 1k 1k25 1k6 2k 2k5 3k15 4k 5k 6k3 8k 10k 12k5 16k 20k 80 315 Serial No: 2k5 3k15 4k 5k 6k3 8k Location: 31 40 50 63 100 125 160 200 250 400 500 630 800 1k 1k25 1k6 2k 10k 12k5 16k 20k Serial No: Location: -12 -6 Equaliser No: 0 +12 0 +6 -12 -6 25 0 +12 0 +6 DN 360 GRAPHIC EQUALISER -12 -6 Equaliser No: 0 +12 0 +6 Fader Setting Record Chart: B A 80 -12 -6 25 0 +12 0 +6 DN 360 GR
