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4 Channel

Auto Compressor

Operation Manual

April 2002

Summary of Contents for C400

Page 1: ...4 Channel Auto Compressor Operation Manual April 2002 ...

Page 2: ...Page 2 This page has been left intentionally blank for your notes ...

Page 3: ...rol 2 8 Gain control 2 9 Gain Reduction meter 2 10 Link switch 3 0 EXTERNAL CONNECTIONS 8 9 3 1 Side Chain insert 3 2 Input 3 3 Output 3 4 Level switch 3 5 Power switch 3 6 Power inlet 4 0 INSTALLATION 10 11 4 1 Inspection and unpacking Phantom 4 2 Operating Environment 48V indicator 4 3 CE Standard and LVD Pad 4 4 Power Requirement Listen 5 0 WARRANTY 12 6 0 TECHNICAL SPECIFICATION 13 7 0 DIMENSI...

Page 4: ...s fully variable controls for Threshold Ratio Release and Gain Compression slope can be switched between Hard or Soft knee with Hard knee providing tight control of compression Ratio and Soft knee a more progressive style of compression Two Attack Release modes are available Auto Attack Release or Program Dependant Attack with manually adjustable Release A low frequency Program filter can be switc...

Page 5: ...adjusts the amount of compression applied to input signals above threshold In SOFT knee mode compression occurs gradually over a 10dB range of input signal level The indicated THRESHOLD level is approximately in the centre of this range and the slope set by the RATIO control will not be reached until the signal level has increased some way above the threshold see Fig 2 1 and 2 2 Control range is 4...

Page 6: ...and Release times are automatically adjusted and are dependant on the dynamic content of the input signal AUTO mode has been designed to work with a wide range of vocal instrument and program sources and can therefore be used in most applications without need to adjust attack and release times In MAN manual mode switch in Attack becomes program dependant and the Release time is manually adjusted u...

Page 7: ... Generally used to compensate for level changes caused by the action of compression Please note As 20dB of gain can be added to the signal path it is possible to cause clipping 2 9 GAIN REDUCTION display An 8 stage led bar graph meter that provides a visual indication of the amount of gain reduction being applied to the input signal 2 10 LINK switch Pressing the LINK switch couples channels 1 2 an...

Page 8: ... possible by joining pin 3 to pin 1 signal ground and using pin 2 as signal hot Please note To maintain correct signal levels in un balanced applications pin 3 must be joined to pin 1 and not left un connected 3 3 OUTPUT Electronically balanced Output with pin 2 wired hot signal For un balanced operation pin 3 can be joined to pin 1 i e pin 2 signal hot and pins 1 3 ground screen Please note To ma...

Page 9: ...for use with a detachable mains cable See Section 3 4 for details of power requirements and fusing Please note The mains protection fuse is inside the unit accessed by removing the top cover Ensure that the unit is disconnected from the mains supply before attempting to replace the fuse ...

Page 10: ...vels 4 3 CE STANDARDS AND THE LOW VOLTAGE DIRECTIVE LVD The C400 has been designed to comply with 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 desc...

Page 11: ...nd may constitute a fire hazard The detachable IEC 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 Please note A protective earth connection made by way of the earth conductor in the power cord is essential for safe operation ...

Page 12: ...cessary 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 mod...

Page 13: ...ld 40dB to 20dB Ratio 1 1 to 20 1 Knee Hard or Soft knee Attack Auto Attack Release or program dependant Release 40ms to 4s manual mode Program Filter 6dB 100Hz Gain 20dB to 20dB Power Requirement 15VA 115 230V AC 50 60Hz PHYSICAL Input Connectors XLR 3 pin Pin 2 hot Output Connectors XLR 3 pin Pin 2 hot Power Connection IEC 3 pin socket Detachable lead Dimensions mm 482 19 W 164 6 5 D 44 1 75 H W...

Page 14: ...Page 14 7 0 DIMENSIONS In keeping with our policy of continuous improvement LA Audio reserves the right to alter specifications without prior notice Manufactured in the UK by LA Audio www laaudio co uk ...

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