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Square ONE Graphic

Rear panel features _________________________________ 15

Mains supply

Audio connections

Audio inputs

Audio outputs

Other features _____________________________________ 16

Power-off bypass relays

Example of system connection_________________________ 17

Using the Square ONE Graphic_________________________ 18

Studio and creative use

Live use - front of house (FOH)

Live use - monitors

Equalising a system _________________________________ 20

Preparing for equalisation

Equalisation using an RTA

Effects of equalisation _______________________________ 22

Effects of equalisation on voice reproduction

Effects of equalisation on music reproduction

Audio signal path ___________________________________ 24

Proportional-Q filter response _________________________ 25

Balanced/unbalanced audio __________________________ 30

Square ONE Graphic application notes___________________ 31

Front-of-house

Monitors

High pass filter (HPF)

Low pass filter (LPF)

Technical specification_______________________________ 32

Frequency chart ____________________________________ 33

Crib sheet_________________________________________ 34

Service information _________________________________ 35

Routine maintenance

Cleaning the unit

Checking/replacing the mains fuse

DOC02-SQ1GRAPHIC_Op_IssE_printdata.pdf 10

27/04/2010 10:06:44

Содержание Square One Graphic

Страница 1: ...graphic operator manual DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 1 27 04 2010 10 06 44...

Страница 2: ...DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 2 27 04 2010 10 06 44...

Страница 3: ...com Website www ktsquareone com Square ONE Graphic Equaliser Operator Manual DOC02 SQ1GRAPHIC Issue E April 2010 Red Chip Company Ltd In line with the company s policy of continual improvement specif...

Страница 4: ...DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 4 27 04 2010 10 06 44...

Страница 5: ...and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete ou...

Страница 6: ...DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 6 27 04 2010 10 06 44...

Страница 7: ...e date Kidderminster UK 15th April 2010 General Manager AVP Product Development Printed name John Oakley Printed name Alex Cooper Product Type Number Product Description Nominal Voltage s Current Freq...

Страница 8: ...DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 8 27 04 2010 10 06 44...

Страница 9: ..._________________ 6 Getting started______________________________________ 7 Unpacking 7 Checking the mains fuse 7 Installation 7 Connecting the power cable 7 Connecting the audio cables 8 Balanced I O...

Страница 10: ...________ 22 Effects of equalisation on voice reproduction 22 Effects of equalisation on music reproduction 23 Audio signal path ___________________________________ 24 Proportional Q filter response __...

Страница 11: ...efficient manufacturing methods and will give you many years of reliable service The Square ONE Graphic is a dual 30 band third octave graphic equaliser It incorporates long throw 45 mm faders and has...

Страница 12: ...o rain or moisture To avoid electrical shock do not remove covers Refer servicing to qualified personnel only The power supplies even the DC ones have a high current General precautions The following...

Страница 13: ...ngineers We strongly recommend that for safety and to optimise the life and performance of the equipment the mains cable plug is removed from the power outlet when the equipment is not to be used for...

Страница 14: ...mounting it directly above power amplifiers or other devices that radiate significant amounts of heat such as radiators and heaters Keep the equipment out of direct sunlight Where necessary use fan c...

Страница 15: ...used in an electromagnetic field that is amplitude modulated by an audio frequency signal 20Hz to 20kHz the signal to noise ratio may be degraded Degradation of up to 60dB at a frequency correspondin...

Страница 16: ...Ds Gain control per channel for continuous adjustment of channel gain Fixed 80Hz high pass filter per channel Fixed 12kHz low pass filter per channel Input gain filters and graphic equalisation on eac...

Страница 17: ...e Before installing the equipment you need to make sure that the mains fuse fitted is of the correct type and rating for your unit To do this follow the instructions in Checking replacing the mains fu...

Страница 18: ...anced I O For unbalanced I O connect the audio cables as shown below 1 3 2 1 2 3 Pin 2 Hot signal Pin 3 Cold signal Pin 1 Screen Ground Female XLR Male XLR Pin 1 Screen Ground Pin 2 Hot signal Pin 3 C...

Страница 19: ...4 TRS connector details Figure 2 Insert send return 1 4 TRS connectors wiring details Note Connect insert send with input and insert return with output of effects device Sleeve ground shield Tip send...

Страница 20: ...nector Connect the ve pin 3 of the balanced connection to the common ground terminal on the unbalanced connector Connect the ground pin 1 of the balanced connection to the common ground terminal on th...

Страница 21: ...GAIN SIGNAL CLIP A B 0 0 2k 1 80 45 mm faders POWER on off indicator illuminates to show power is on High pass filter switch with LED on off indicator above GAIN rotary control knob Level metering wi...

Страница 22: ...CONTINUED PROTECTION AGAINST RISK OF ATTENTION CAUTION FIRE REPLACE WITH THE SAME TYPE AND VALUE FUSE INDICATED REMPLACER PAR UN FUSIBLE DE M ME TYPE COMME INDIQU RISK OF ELECTRIC SHOCK DO NOT OPEN NO...

Страница 23: ...ost gain control such that internal clipping due to excessive EQ that is if a high input level is further boosted by the use of EQ will also be shown Graphic EQ section The graphic EQ section of the S...

Страница 24: ...y and allow higher gain before feedback To audition the effect of the filters just switch them on or off and note the effect BYPASS switch Each channel has BYPASS pushbutton on off switch with red LED...

Страница 25: ...ge sensing switching mode power supply that will operate where the nominal mains voltage is in the range 100VAC to 240VAC The correct mains lead for the country to which the unit was shipped is suppli...

Страница 26: ...es Power off bypass relays The Square ONE Graphic incorporates a fail safe hardware bypass to prevent audible thumps when the unit is switched off or if any of its internal power rails should fail The...

Страница 27: ...tion EQUALISER FOH Console Delay Line EQUALISER EQUALISER X Over Amplifiers X Over Amplifiers X Over Amplifiers X Over Amplifiers Delay FoH Delay FoH Centre Cluster Main FOH Main FOH Stage Monitors Mo...

Страница 28: ...trying to engineer using the system Again it is common to use an RTA and measurement microphone to set up the equaliser using additive and subtractive equalisation to correct problems in the room It...

Страница 29: ...sense of hearing that enables them to remove these frequencies by ear The Square ONE Graphic s 30 EQ bands allow a majority of feedback to be removed from the monitors High and low pass filters are p...

Страница 30: ...e immediately noticeable with pink noise can be detected and corrected before equalisation Especially check the system s crossover points as these may reveal problems with the system Note that poor co...

Страница 31: ...isation should act as a warning that there may be an underlying problem which may need rectifying first for example phase cancellation blown drivers etc During the performance the FOH or monitor engin...

Страница 32: ...e like quality 1k25 to 4k Vocal fricatives Accentuation and clarity of voice Important to speech intelligibility Too much boost between 2kHz and 4kHz can mask certain speech sounds for example m b and...

Страница 33: ...percussion 630 800 1k Fundamentals and harmonics of strings keyboards and percussion Boosting 600 1kHz range can make instruments sound horn like 1k25 to 4k Drums guitar accentuation of vocals string...

Страница 34: ...following diagram shows the path of the audio signal for each channel Switch Switch Switch BYPASS Input Output High pass filter Graphic EQ Two stages Graphic EQ Low pass filter 40dBu 22dBu PUSH 80 12k...

Страница 35: ...um gain 0dB when cutting which results in a notch filter response In all types of graphic equalisers one of the key issues is how the summing of adjacent EQ bands alters the frequency response Lower Q...

Страница 36: ...f boost and cut Figure 6 and Figure 7 show the problem that occurs with using this response for full boost and cut Here far more of the audio spectrum is affected due to each band being broader as a c...

Страница 37: ...f Proportional Q equalisation is that the EQ bands are wider at lower amounts of boost and cut They become narrower as greater amounts are applied thus giving the optimum balance of smoothness d B 15...

Страница 38: ...8 and Figure 9 show the Square ONE Graphic responses for both 2dB and full scale boost and cut Note that the smooth combining of the bands for small amounts of boost and cut is very similar to that o...

Страница 39: ...quare ONE Graphic also provides high pass and low pass filters These can be used to enhance the intelligibility of wedge monitors by cutting out extraneous low and high frequency noise and therefore a...

Страница 40: ...shield that surrounds the hot and cold cables An unbalanced connection only has two cables one of which the grounded shield is also used for signal return As the hot and cold cables are of equal volta...

Страница 41: ...always visible at a glance High and low pass filters allow the frequency limits to be accurately controlled for each output This last feature while very useful for conventional wedge monitors really...

Страница 42: ...logue electronically balanced Pin 2 hot 2k Ohms 60 Ohms 22dBu 3dB drop in level relative to open circuit voltage when driving 200 Ohms Performance Frequency response Dynamic range Noise floor Gain 0 5...

Страница 43: ...OMS BASS DRUM SNARE TOMS GUITAR 315 400 500 630 800 1k 1k25 1k6 2k 2k5 3k15 4k 5k 6k3 8k 10k 12k5 16k 20k 25 31 5 40 50 63 80 100 125 160 250 200 Hz Hz 315 400 500 630 800 1k 1k25 1k6 2k 2k5 3k15 4k 5...

Страница 44: ...plication Date BYPASS 2k 1 80 POWER SIGNAL CLIP A B 12 12 12 12 12 12 12 12 graphic BYPASS 2k 1 80 6 GAIN 0 6 GAIN 0 BYPASS 2k 1 80 POWER SIGNAL CLIP A B 12 12 12 12 12 12 12 12 graphic BYPASS 2k 1 80...

Страница 45: ...the unit using a dry lint free cloth Do not use harsh abrasives or solvents When cleaning the unit take great care not to damage faders pushbuttons etc Checking replacing the mains fuse The equipment...

Страница 46: ...Service information 36 Square ONE Graphic DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 46 27 04 2010 10 06 47...

Страница 47: ...DOC02 SQ1GRAPHIC_Op_IssE_printdata pdf 47 27 04 2010 10 06 47...

Страница 48: ...Walter Nash Road Kidderminster Worcestershire DY11 7HJ England Tel 44 1562 741515 Fax 44 1562 745371 Email info midasklarkteknik com Website www ktsquareone com 2010 Red Chip Company Ltd DOC02 SQ1GRAP...

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