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LA Audio Electronic EQX20, Руководство по эксплуатации

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Dual 3 Band, Mono 6 Band 

Parametric Equaliser

 

 
 

OPERATION  MANUAL 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 
 
 

 

 
 
 
 
 
 
 
 

 

Содержание EQX20

Страница 1: ...Dual 3 Band Mono 6 Band Parametric Equaliser OPERATION MANUAL ...

Страница 2: ...Page 2 Version V1 April 2000 ...

Страница 3: ...ns 3 Warranty Page 7 4 Description of controls Page 8 4 1 Channel 1 Page 8 4 2 Channel 2 Page 10 5 Applications Page 11 12 5 1 Setting up and using the EQX20 Audio sweetening and Precision equalisation Removing subsonics Making compressors frequency conscious Special effects Enhancing the EQ on a mixing console 6 Circuit description Page 13 7 Specifications Page 14 6 Blank panel drawings Page 15 ...

Страница 4: ...facilities provided by the EQX20 are summarised as follows 2 Channel 3 band or single channel 6 band parametric EQ Wide frequency sweep 40 1 on each band Q variable between 12 1 12th octave 1 semitone to 0 3 3 octaves 15dB gain on each band High pass filter on each channel Bypass switching on each channel Balanced inputs on XLR and TRS jack Balanced impedance ground compensated outputs on XLR and ...

Страница 5: ... to meet the latest Electromagnetic Compatibility EMC regulations However we recommend you do not operate the unit close to strong emitters of electromagnetic radiation such as power transformers motors mobile telephones or radio transmitters The unit should only be connected to a power supply of the type described in 2 4 POWER REQUIREMENTS or as marked on the unit The unit must be earthed for saf...

Страница 6: ...V 60Hz version for Republic of Korea The mains lead connections to the appliance are coloured in accordance with the following code Green and Yellow Earth Blue Neutral Brown Live WARNING THIS APPLIANCE MUST BE EARTHED 2 5 SIGNAL LEVELS The EQX20 will accommodate both 10dB and 4dB operating levels without the need for level switching PLEASE NOTE the XLRs are set for 4dBu and the TRS jacks for 10dBV...

Страница 7: ...nd For un balanced operation join Ring and Sleeve on input output or both Sleeve Screen Ring Cold Tip Hot XLR 4dBu Pin 1 Screen Signal ground Pin 2 Hot ve Pin 3 Cold ve For un balanced operation join pins 1 and 3 on input output or both Pin 1 Screen Pin 2 Hot Pin 3 Cold PUSH The 20kΩ input impedance of both inputs is suitable for most types of equipment Plugging a mono jack lead into the TRS input...

Страница 8: ...necessary to return the unit to an LA Audio authorised service centre or to the factory with a dated receipt as proof of purchase After repair the unit will be returned to you free of charge Limitations This warranty does not cover damage resulting from accident or misuse The warranty is void unless repairs are carried out by an authorised service centre The warranty is void if the unit has been m...

Страница 9: ...ifferent cut and boost settings Maximum cut or boost occurs at the centre frequency set by the FREQUENCY control Q control Varies the Q bandwidth of the cut or boost region A low Q CW clock wise affects a wide band of frequencies whilst a high Q CCW affects a very small band The Q control on the EQX20 has a range of 0 3 3 octaves to 12 1 12th octave The following diagram shows the effect of differ...

Страница 10: ...ge and is adjustable from 20Hz CCW to 1kHz CW The following diagram shows the effect of changing the centre frequency MF control Sets the amount of cut or boost for the MF Mid Frequency section FREQUENCY control This control varies the cut or boost centre frequency for the MF mid Frequency section Control range is 200Hz CCW to 8kHz CW Q control Varies the Q of the cut or boost region for the MF se...

Страница 11: ...he Q of the cut or boost region for the HF section CLIP led The CLIP led monitors the last stage of the EQ section and indicates signal levels approaching clipping The led lights at 3dB before clipping so momentary peaks are monitored but are not necessarily audible Excessive amounts of boost will cause the EQX20 to clip Remember that overlapping boost from two sections can also accumulate and cau...

Страница 12: ...flabby bass sound see applications In MONO 6 Band mode only the filter switch on Channel 1 is enabled MONO led Pressing the MODE switch on the rear of the EQX20 lights the MONO led This puts the two EQ channels in series to form a single mono 6 band unit In this mode the BYPASS and 75Hz filter switches on Channel 2 are disabled Channel 1 BYPASS now switches the whole EQ in and out of the signal pa...

Страница 13: ...e simulated by setting the HF and LF section Qs fully CW 0 3 and sweeping their associated FREQUENCY controls out towards the high and low frequency extremes High Qs are normally used for cutting sounds such as mains hum or certain feedback frequencies In this application Q should be set as high as possible narrow bandwidth Lower Qs and cutting can be used for reducing boominess found with some ac...

Страница 14: ...Page 14 Kick drum Slap at 3 5kHz Floppy around 600 650Hz Bass at 40 125Hz Boomy below 80Hz Snare drum Crack at 2 3kHz In the way 1kHz Body at 125Hz to 300Hz Bottom 80Hz ...

Страница 15: ...0 400Hz Popping below 80Hz Those who have been paying proper attention will have noticed that on the same instrument there are suggestions for both cut and boost at the same frequencies Well there s no accounting for taste REMOVING SUB SONICS The 75Hz high pass filter is useful for removing subsonics such as wind and stage noise and will often help produce a much tighter bass and vocal sound MAKIN...

Страница 16: ...nce this effect ENHANCING THE EQ ON A MIXING CONSOLE Patch the EQX20 into the insert points on your console to add further equalisation capabilities when treating individual sounds Or patch into Group inserts for equalising sub mixes or into the Stereo inserts for overall mix EQ ...

Страница 17: ... in the pass band The 3dB frequency for this filter is 75Hz EQUALISER The equaliser section is based on a State Variable Filter which provides variable Gain Frequency and Q with very little interaction between the controls There are 3 stages in series for each channel OUTPUT The output stage is a balanced impedance ground sensing amplifier which provides level matching and a low impedance output T...

Страница 18: ...dance 100Ω 4dBu output Max output 20dBu PERFORMANCE THD 0 01 4dBu output Noise 86dBu 20Hz to 20kHz Frequency response 1dB 20Hz to 20kHz EQ in CONTROLS GAIN 15dB FREQUENCY LF 20Hz to 1kHz MF 200Hz to 8kHz HF 500Hz to 20kHz Q 0 3 3 octaves to 12 1 12 octaves CLIP led lights 3 dB before clipping HIGH PASS FILTER 3dB at 75Hz 12dB Octave POWER SUPPLY Mains voltages 230VAC 50Hz 6VA Europe 115VAC 60Hz 6V...

Страница 19: ...Page 19 Dimensions 1 75 44mm H x 19 482mm W x 6 5 165mm D Weight Unit 2 2kg Shipping 2 85kg LA Audio reserves the right to alter any feature or specification without prior notice E OE ...

Страница 20: ...Page 20 ...

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