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286

19

286s

  Section 6 - Technical Specifications

MIC INPUT    

Floating balanced, Pin 2 Hot

 

Impedance 

~ 4.2k

Ω

 Balanced

 

Maximum Level 

0.25Vrms, Gain=30dB

 

Gain Adjustment Range 

+0dB ... +60dB

 

Phantom Power 

+48VDC, applied to XLR pins 2 and 3 through 6.81k

Ω

 resistors

  CMRR  

>40dB, typically 55dB

 

EIN  

 

–125dBu, 22Hz-22kHz, 150

Ω

 source impedance

LINE INPUT   

Floating balanced, TIP Hot

 Impedance 

10k

Ω

 unbalanced, 20k

Ω

 balanced

 

Maximum Level 

>+21dBu, balanced or unbalanced

 

Gain Adjustment Range 

-15dB ... +45 dB

  CMRR  

>40dB, typically 55dB

INSERT (1/4” TRS phone) 

Normalled; tip is Send, ring is Return

 

Ring: Impedance 

>5k

Ω

 

 

  Maximum Level  

>+21dBu

 

Tip:   Impedance 

100

Ω

 

 

  Maximum Level 

>+21dBu, >+20dBm (600

Ω

 load)

 

Noise   

<-89dBu, unweighted (20Hz-20kHz); LINE GAIN Control set to 0dB

 

Distortion 

<0.01% THD, 20Hz-20kHz, +10dBu

LINE OUTPUT (4” TRS phone) 

Balanced/Unbalanced

 Impedance 

100

Ω

 unbalanced, 200

Ω

 balanced

 

Maximum Level 

>+21dBu, >+20dBm (600

Ω

 load)

 

Gain Adjustment Range 

-30dB ... +10dB

  Noise  

<-85dBu unweighted (20Hz-20kHz); Both Gain Controls set for 0dB, all  

    

processing 

controls 

OFF

 

Frequency Response 

20Hz ... 20kHz, +0.5, -0.5dB

 Distortion 

<0.08%THD, 20Hz-20kHz, +10dBu, all Processing Controls OFF

COMPRESSOR
 

Threshold Range 

-40dBu to +20dBu

 

Compression Ratio 

>4:1 For input levels beyond 20dB above threshold

 

Maximum Compression 

30dB

 

Attack Time 

Program-Dependent; >1s for small level increases, down to 10ms for 

    

large 

increases

 

Release Time 

Program-Dependent; adjustable between approximately 1dB/Sec and 75dB/Sec

 

Distortion 

Typically <0.05%THD, 20Hz-20kHz, 15dB G/R, +10dBu Output, DENSITY @ 0

 

SMPTE Intermodulation Distortion 

<0.05%; 60Hz/7kHz 4:1, 15dB G/R, +10dBu Output Level, DENSITY @ 0

Section 6

Technical Specifications

Содержание dbx 286S

Страница 1: ...286 User Manual Mic Preamp Processor Professional Audio Equipment...

Страница 2: ...Power Cord WARNING THIS APPLIANCE SHALL BE CONNECTED TO A MAINS SOCKET OUTLET WITH A PROTECTIVE EARTHING CONNECTION The cores in the mains lead are coloured in accordance with the following code GREEN...

Страница 3: ...Sandy Utah 84070 USA Date September 10 2010 European Contact Your local dbx Sales and Service Office or Harman Music Group 8760 South Sandy Parkway Sandy Utah 84070 USA Ph 801 566 8800 Fax 801 568 75...

Страница 4: ...2 2 Front Panel 5 Section 3 Basic Operation 10 3 1 Connecting the 286s to Your System 10 3 2 Understanding the 286s Mic Preamp 10 Section 4 Problems Possible Causes Solutions 16 Section 5 Technical S...

Страница 5: ...on These two sections can be used together or the 286s can be used as a dedicated Mic Preamp by defeating the Processing Section via the front panel BYPASS switch Furthermore the Processing Section pr...

Страница 6: ...rn a product to the factory for service you MUST first contact Customer Service to obtain a Return Authorization Number No returned products will be accepted at the factory without a Return Authorizat...

Страница 7: ...ts and labor will be covered up to a period of two years A Return Authorization number must first be obtained from dbx by telephone The company shall not be liable for any consequential damage as a re...

Страница 8: ...INE OUTPUT Jack The 286s LINE OUTPUT jack accepts either balanced or unbalanced 1 4 phone plugs Nominal output signal levels is 0dBu into 600 and maximum output signal level is 21dBu into 600 Output i...

Страница 9: ...you connect a microphone power on the unit or press the PHANTOM button This will eliminate spikes and surges acoustical feedback loud pops momentary hiss or other unwanted sounds Mic Preamp MIC GAIN...

Страница 10: ...TOM POWER button is in 80 Hz HIGHPASS Button and LED Press this button In to activate the 286s pre processing third order filter The HIGHPASS function filters out frequencies below 80Hz by 18dB octave...

Страница 11: ...elease for smooth compression to 10 a fast release where compression follows the envelope of the program very tightly There is no absolute right way to set the DENSITY control However in general slowe...

Страница 12: ...s all signals unattenuated effectively bypassing the gate Turning the knob fully clockwise causes the gate to attenaute input signals below approximately 15dBu The amount of attenaution depends on the...

Страница 13: ...ou have adjusted the 286s controls for the desired amount of processing adjust the OUTPUT GAIN control clockwise to add gain as needed The red OUTPUT GAIN LED located to the right of the OUTPUT GAIN c...

Страница 14: ...NOT connect anything other than a microphone to the MIC INPUT C Connect the load e g mixer recorder etc to the 286s LINE OUTPUT jack D Connect an external processor or effects device to the 1 4 INSER...

Страница 15: ...in level below the threshold of compression the compressor gain remains fixed If the input increases above the threshold of compression the gain begins to decrease i e the amount of gain reduction inc...

Страница 16: ...r sometimes called a Spectral Enhancer adds clarity and detail to vocals or other line level signals by intelligently boosting specific frequency ranges Use the HF DETAIL control to add high frequency...

Страница 17: ...in is added at all the preceding stages of the 286s Using the Four Processors in Different Combinations Note Too high of a THRESHOLD setting with expansion i e lower EXPANSION RATIOs may cause the 286...

Страница 18: ...g should initially be applied conservatively to taste avoid overusing an effect unless it is absolutely necessary For example use De Essing for sibilance or high frequency distortion only otherwise tu...

Страница 19: ...tively re energized and enhanced with treatment Use to taste Program Dependent Use when program material needs treatment Make sure you use only as much treatment as needed Not Recommended The 286s is...

Страница 20: ...ultitrack studio applications consider gating out the hiss during the initial recording then adding HF DETAIL enhancement afterwards during mixdown Audible Distortion With certain combinations of cont...

Страница 21: ...essive brightness try reducing the HF DETAIL or increasing the De Esser THRESHOLD if the audio is a single track as appropriate Low Rumble or Excessive Low Frequencies Although the HIGHPASS button wor...

Страница 22: ...ice be prepared to accurately describe the problem Know the serial number of your unit this is printed on a sticker attached to the rear panel Note Please refer to the terms of your Limited Two Year S...

Страница 23: ...0dB Distortion 0 01 THD 20Hz 20kHz 10dBu LINE OUTPUT 4 TRS phone Balanced Unbalanced Impedance 100 unbalanced 200 balanced Maximum Level 21dBu 20dBm 600 load Gain Adjustment Range 30dB 10dB Noise 85dB...

Страница 24: ...s approximately 2 1 EXPANDER GATE Threshold Range OFF 15dBu Expansion Ratio Adjustable 1 5 1 10 1 Maximum Depth 50dB Attack Time Program Dependent approximately 2ms at maximum attenuation Release Time...

Страница 25: ...286 21 286s Section 7 Block Diagram...

Страница 26: ...286 22 286s...

Страница 27: ...286 23 286s...

Страница 28: ...286 8760 South Sandy Parkway Sandy Utah 84070 Phone 801 568 7660 Fax 801 568 7662 Int l Fax 801 568 7583 Visit us online at www dbxpro com 18 0728V A Printed in China...

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