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AUTOCOM PRO MDX1400

Gate section can be used as an independent unit to eradicate noise offering almost limitless possibilities

within this application.

The BEHRINGER Dynamic Enhancer

One of the most common negative effects of broadband compressors is the “dulled” or “squashed” sound that

is produced when it is applied to composite music, since high-energy low frequency instruments cause a

compressor to reduce the overall gain. Any high frequency instrument which occurs at the same time will also

be reduced in level. This “spectral intermodulation” causes the “squashed” sound effect.
The solution to this problem is the new AUTOCOM PROs Dynamic Enhancer which allows for selective

replacement of high-end loss accrued through use of compression. Since the Enhancer tracks the amount of

compression, enhancement will not be added when no compression throughout the mix without any additional

outboard enhancer etc.

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The following instructions should familiarize you with the special terms used first, so that you

can get to know all the functions of the unit. After you have read the instructions carefully,

please put them away safely, so that you can refer to them again if necessary.

1.2 Before you begin

Your BEHRINGER AUTOCOM PRO was carefully packed in the factory and the packaging is designed to

protect the unit from rough handling. Nevertheless, we recommend that you carefully examine the packaging

and its contents for any signs of physical damage, which may have occurred during transit.

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If the unit is damaged, please do not return it to BEHRINGER, but notify your dealer and the

shipping  company  immediately,  otherwise  claims  for  damage  or  replacement  may  not  be

granted. Shipping claims must be made by the consignee.

The BEHRINGER AUTOCOM PRO fits into one standard 19" rack unit of space. Please allow at least an

additional 4" depth for the connectors on the back panel.
Be sure that there is enough space around the unit for cooling and please do not place the ULTRA-GRAPH PRO

on high temperature devices such as power amplifiers etc. to avoid overheating.

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Before you connect your AUTOCOM PRO to the mains, please make sure that your local volt-

age matches the voltage required by the unit!

The fuse holder on the female mains connector has 3 triangular markers, with two of these triangles opposing

each other. Your AUTOCOM PRO is set to the operating voltage printed next to these markers, and can be set

to another voltage by turning the fuse holder by 180°. 

CAUTION: this instruction does not apply to export

models exclusively designed, e.g., for 115 V operation!

The mains connection of the AUTOCOM PRO is made by using the enclosed mains cable and a standard IEC

receptacle. It meets all of the international safety certification requirements.

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Please make sure that all units have a proper ground connection. For your own safety, never

remove or disable the ground conductor of the unit or of the AC power cable.

1. INTRODUCTION

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Summary of Contents for Autocom Pro MDX1400

Page 1: ...D AUTOCOM PRO MDX1400 www behringer com ENGLISH User s Manual Version 1 4 June 2001 Downloaded from www Manualslib com manuals search engine...

Page 2: ...rs that produce heat Power Source The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance Grounding or Polarization P...

Page 3: ...portant member of the BEHRINGER family With your highly competent suggestions for new products you ve greatly contributed to shaping our company and making it successful In return we guarantee you unc...

Page 4: ...lows for inaudible elimination of disturbing noise signals s Dynamic Enhancer for compression dependent equalization s Extremely low noise operational amplifiers and high grade VCA s s High quality de...

Page 5: ...uplication 17 4 1 1 The AUTOCOM PRO In Digital RecordingAnd Sampling 18 4 1 2 TheAUTOCOM PRO In Mastering 18 4 2 TheAUTOCOM PROAs AProtective Device 18 4 2 1 Protection Of ASystem With A Passive Cross...

Page 6: ...ncept of a hard knee compressor with the characteristics of a soft knee approach This program dependent regulation scheme forms the prerequisite both for inaudible and musical program compression and...

Page 7: ...packaging and its contents for any signs of physical damage which may have occurred during transit If the unit is damaged please do not return it to BEHRINGER but notify your dealer and the shipping...

Page 8: ...f channel 1 take over the functions of channel 2 Should you wish to use the SC EXT function in stereo mode then be sure that both SC RETURN jacks are connected to the external control signal and that...

Page 9: ...ttack and release controls will function 10 The OUTPUT control allows for the increase or decrease of the output signal by a maximum of 20 dB Thus a level loss due to the compression or limiting proce...

Page 10: ...t between Off and 6 Dynamic enhancement allows you to replenish any high frequencies lost through the compression process for absolutely natural sounding dynamics control Enhancement is only added whe...

Page 11: ...ression Levelling Limiting Clipping Now that the functions of the individual sections have been clearly explained we would like to acquaint you with more terms and relationships of the dynamics proces...

Page 12: ...nt on the program material The response characteristics of conventional expanders tend to cut into the signal abruptly and the result of this is unacceptable most of the time Gain changes become audib...

Page 13: ...Now turn the control clockwise until all unwanted noise is removed and only the sound of the desired instrument can be heard To adapt the unit to the program material properly you can additionally cho...

Page 14: ...fined threshold The reverberation can be controlled by using the THRESHOLD control and the RELEASE switch The decay characteristics of the instrument can be controlled using the release switch so that...

Page 15: ...h IN SC EXT switch OUT SC MON switch OUT INTERACTIVE switch IN SC FILTER switch OUT THRESHOLD control 20 dB RATIO control 3 1 AUTO switch IN OUTPUT control 0 dB Tab 3 2 Initial settings for the compre...

Page 16: ...ame effect is experienced when processing reverberated or ambient sounds The solution commonly used to this basic problem is either to reduce the compression ratio or to slow down the attack time so t...

Page 17: ...one should always take care to utilize the full dynamic range of the tape recorder DAT recorder etc Principally it is possible to control the recording level by riding faders which means with low lev...

Page 18: ...AT recorder Now increase the recording level of the recorder back to unity The result is a clearly louder recording without any loss of sound 4 2 The AUTOCOM PRO As A Protective Device Sound system di...

Page 19: ...the loudspeaker In some units the crossover frequencies in the crossover unit are further changed during high signal levels to achieve a loudness contour suited to the human hearing But in many cases...

Page 20: ...ive amount of high frequency information within the program material as in a normal compressor the VCA is activated and the overall level is reduced As this type of compression affects the whole frequ...

Page 21: ...ick actions Generally it can be said that relatively high threshold settings prevent the overall sound from being impaired and lead to the compression of solo instruments or very loud sounds 5 2 4 Emp...

Page 22: ...requencies are equally affected we term this white noise It is fairly obvious that electronics cannot function without components Even if special low noise components are used a certain degree of basi...

Page 23: ...control is simply not fast enough to be satisfactory t P dB 20 0 20 40 60 80 Clipping Headroom Operating level Effective SNR Noise floor Fig 6 2 The interactive relationship between the operating lev...

Page 24: ...fect noise will be masked and thus becomes inaudible as soon as considerably louder sound signals in the same frequency band are added Nevertheless the further the level that the desired signal decrea...

Page 25: ...ty Please ensure that only qualified persons install and operate the AUTOCOM PRO During installation and operation the user must have sufficient electrical contact to earth Electro static charges migh...

Page 26: ...z 0 0 5 dB Frequency Response 0 35 Hz to 200 kHz 0 3 dB Noise 95 dBu unweighted 22 Hz to 22 kHz THD 0 008 typ 4 dBu 1 kHz Gain 1 0 04 typ 20 dBu 1 kHz Gain 1 IMD 0 01 typ SMPTE Crosstalk 100 dB 22 Hz...

Page 27: ...ement LED display 1 2 4 6 9 12 15 18 21 24 27 30 dB Input Output Level 12 element LED display 30 24 18 12 6 0 3 6 9 12 18 dB Expander Gate Threshold 2 LEDs for under and above Function switch LED indi...

Page 28: ...RINGER 2 If the product needs to be modified or adapted in order to comply with applicable technical or safety standards on a na tional or local level in any country which is not the country for which...

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