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286

To use the INSERT jack to MULT the preamp out (i.e., to provide an output with a buffered 
version of the signal after the Mic Preamp circuitry, but before the Processing Section), insert 
a Mono 1/4” plug fully into the INSERT jack, then pull the plug out one click.  Plug the other 
end of the cable to the appropriate load.  This will still allow the original signal path to 
continue to the Processing Section without interruption.

Note:

 If the plug is accidentally pushed fully into the INSERT jack, it will break off the 

connection between the Mic Preamp and Processing Sections; in this case, there would be 
no signal at the 286s LINE OUTPUT jack.

AC Power

Connect the AC power cord to the AC receptacle on the back of the unit.  Route the AC power 
cord to a convenient power outlet away from audio lines.  The unit may be turned on and off 
from a master equipment power switch.

2.2 Front Panel

Note:

  To reduce the risk of damage to your system, set the MIC GAIN control fully 

counterclockwise and lower your playback monitor levels before 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 (dB) and LEVEL (dBu) LEDs (including CLIP LED)

  

Use this control to set the level of gain added to the microphone input signal (or a line-level 
input).  Note that the 286s processing controls, or an external processor connected to the 
286s INSERT, can provide additional gain.  Try to set the MIC GAIN control so that you 
do no have to reset it repeatedly; allow headroom for the maximum expected levels.  For 
microphones (connected to the XLR MIC INPUT connector), the 286s can p0dB to 
+60dB of input gain.  For line-level inputs (connected to the LINE INPUT jack), the gain is 
from -15dB to +45dB.  

Note:

 To get the lowest noise possible from the 286s, set the input attenuators (if any) on 

your recorder or mixer for nominal levels (often about 3/4” of the way up or at the detent 
position; refer to the device’s operating manual).  Then, set the 286s MIC GAIN so that your 
recorder or mixer is at its optimal operating level.

The red CLIP LED (located to the left of the MIC GAIN control) indicates that the combination 

Section 2

Operating Controls

5

286s

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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