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286

IMPORTANT SAFETY INFORMATION

WARNING FOR YOUR PROTECTION

READ THE FOLLOWING:

KEEP THESE  INSTRUCTIONS

HEED ALL WARNINGS

FOLLOW ALL INSTRUCTIONS

THE APPARATUS SHALL NOT bE ExPOSED TO DRIPPING OR 

SPLASHING LIqUID AND NO ObjECT FILLED WITHI LIqUID, 

SUCH AS vASES, SHALL bE PLACED ON THE APPARATUS.

CLEAN ONLY WITH A DRY CLOTH.

DO NOT bLOCK ANY OF THE vENTILATION OPENINGS. 

INSTALL  IN ACCORDANCE WITH THE  MANUFACTURER’S 

INSTRUCTIONS.

DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS RA-

DIATORS, HEAT REGISTERS, STOvES, OR OTHER APPARATUS 

(INCLUDING AMPLIFIERS) THAT PRODUCE HEAT.

ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED bY THE 

MANUFACTURER.

UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR 

WHEN UNUSED FOR LONG PERIODS OF TIME.

Do not defeat the safety purpose of the polarized or grounding-

type plug.  A polarized plug has two blades with one wider than the 

other.  A grounding type plug has two blades and a third grounding 

prong.  The wide blade or third prong are provided for your safety.  

If the provided plug does not fit your outlet, consult an electrician 

for replacement of the obsolete outlet.

Protect the power cord from being walked on or pinched particu-

larly at plugs, convenience receptacles, and the point where they 

exit from the apparatus.

Use only with the cart stand, tripod bracket, or table specified by 

the manufacture, or sold with the apparatus.  When a cart is used, 

use caution when moving the cart/apparatus combination to avoid 

injury from tip-over.

Refer all servicing to qualified service personnel.  Servicing is 

required when the apparatus has been damaged in any way, such 

as power-supply cord or plug is damaged, liquid has been spilled 

or objects have fallen into the apparatus, the apparatus has been 

exposed to rain or moisture, does not operate normally, or has 

been dropped.

POWER ON/OFF SWITCH: If the equipment has a Power switch, 

the Power switch used in this piece of equipment DOES NOT 

break the connection from the mains.

MAINS DISCONNECT:  The plug shall remain readily operable.  

For rack-mount or installation where plug is not accessible, an 

all-pole mains switch with a contact separation of at least 3 mm in 

each pole shall be incorporated into the electrical installation of the 

rack or building.

FOR UNITS EqUIPPED WITH ExTERNALLY ACCESSIbLE FUSE 

RECEPTACLE:    Replace fuse with same type and rating only.

MULTIPLE-INPUT vOLTAGE: This equipment may require the use 

of a different line cord, attachment plug, or both, depending on the 

available power source at installation. Connect this equipment only 

to the power source indicated on the equipment rear panel. To 

reduce the risk of fire or electric shock, refer servicing to qualified 

service personnel or equivalent.

If connected to 240v supply, a suitable CSA/UL certified power 

cord shall be used for this supply.

Safety InStructIonS 

Notice For customers iF Your uNit is equipped With A 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 and YELLOW - Earth        BLUE - Neutral        BROWN - Live

As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings 

identifying the terminals in your plug, proceed as follows:

•  the core which is coloured green and yellow must be connected to the terminal in the plug marked with the 

letter e, or with the earth symbol, or coloured green, or green and yellow.

•  the core which is coloured blue must be connected to the terminal marked N or coloured black.

•  the core which is coloured brown must be connected to the terminal marked L or coloured red.

 

this equipment may require the use of a different line cord, attachment plug, or both, depending on the 

available power source at installation.  if the attachment plug needs to be changed, refer servicing to qualified 

service personnel who should refer to the table below. the green/yellow wire shall be connected directly to 

the units chassis.

CONDUCTOR

WIRE COLOR

Normal

Alt

L

LIVE

BROWN

BLACK

N

NEUTRAL

BLUE

WHITE

E

EARTH GND

GREEN/

YEL

GREEN

WARNING: 

if the ground is defeated, certain fault conditions in the unit or in the system to which it is connected 

can result in full line voltage between chassis and earth ground. severe injury or death can then result if the 

chassis and earth ground are touched simultaneously.

the symbols shown above are internationally accepted symbols that warn of potential 

hazards with electrical products. the lightning flash with arrowpoint in an equilateral triangle 

means that there are dangerous voltages present within the unit. the exclamation point 

in an equilateral triangle indicates that it is necessary for the user to refer to the owner’s 

manual.

these symbols warn that there are no user serviceable parts inside the unit. do not open the 

unit. do not attempt to service the unit yourself. refer all servicing to qualified personnel. 

opening the chassis for any reason will void the manufacturer’s warranty. do not get the 

unit wet. if liquid is spilled on the unit, shut it off immediately and take it to a dealer for 

service.  disconnect the unit during storms to prevent damage.

If you want to dispose this product, do not mix it with general household waste.  There is a 
separate  collection  system  for  used  electronic  products  in  accordance  with  legislation  that 
requires proper treatment, recovery and recycling.

Private household in the 25 member states of the EU, in Switzerland and Norway may return their used 
electronic products free of charge to designated collection facilities or to a retailer (if you purchase a similar 
new one).
For Countries not mentioned above, please contact your local authorities for a correct method of disposal.
By doing so you will ensure that your disposed product undergoes the necessary treatment, recovery and 
recycling and thus prevent potential negative effects on the environment and human health.

Содержание 286 S

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 and YELLOW Earth BLUE Neutral BROWN Live As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as f...

Страница 3: ...y 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 7583 ELECTROMAGNETIC COMPATIBILITY This unit conforms to the Product Specifications noted on the Declaration of Conformity Operation is subject to the following two conditions this device may not cause...

Страница 4: ...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 Support and Factory Service 18 Section 6 Technical Specifications 19 Section 7 Block Diagram 21 286s Table of Contents ...

Страница 5: ...ion 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 provides four specific types of processing Compression De essing Enhancement and Expansion Gating These four controls can be used in any combination as appropriate to your requirements External audio p...

Страница 6: ...urn 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 Authorization Number Please refer to the Warranty information on the following page which extends to the first end user After expiration of the warranty a reasonable charge will be made for parts labor and pac...

Страница 7: ...rts 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 result of the product s use in any circuit or assembly 4 dbx reserves the right to make changes in design or make additions to or improvements upon this product without incurring any obligation to inst...

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 600Ω and maximum output signal level is 21dBu into 600Ω Output impedance is 100Ω unbalanced 200Ω balanced The output is tip HOT INSERT Jack The 286s INSERT jack allows you to either add an effects loop directly into the 286s circuitry chain or take a separate mi...

Страница 9: ...e 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 pro...

Страница 10: ...NTOM 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 before any compression de essing etc is applied to input signal This is most effective for reducing hum rumble wind and other low frequency problems The HIGHPASS filter is also before any external p...

Страница 11: ...release 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 slower settings are useful for gating out noise present behind vocals and acoustic instruments while faster settings are useful for tightening up the sound of percussion instruments e g a kick or snare dr...

Страница 12: ...ss 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 setting of the Expander Gate s EXPANSION RATIO The THRESHOLD LED located to the right of the EXPANSION RATIO control lights when the signal is below the set THRESHOLD The THRESHOLD LED lights when t...

Страница 13: ...you 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 control lights when the 286s Processing Section is clipping reduce gain via the OUTPUT GAIN control Set this control so that the OUTPUT CLIP LED never lights If the OUTPUT CLIP LED is still lit reduce...

Страница 14: ...O 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 INSERT jack Optional 4 Connect the AC power cord to the AC power receptacle on the back of the unit Note We recommend you always power on the unit with the MIC GAIN control set to its minimum level fully ...

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 increases For very large input signals the gain can decrease considerably On the 286s compression occurs as an input level is driven into gain reduction by the DRIVE control as the DRIVE setting adjuste...

Страница 16: ...er 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 energy to the input signal Use the LF DETAIL to add punch and definition at the lower end of the spectrum The HF Detail circuitry in the 286s uses a dynamic shelving equalizer to provide results sup...

Страница 17: ...ain 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 286s to attenuate the desired portion of the signal as well as the undesired portion Too high of an EXPANSION RATIO setting my cause undesirable effects with highly modulated program material like vocal...

Страница 18: ...ng 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 turn the control OFF Or for material already rich in high frequencies set the HF DETAIL to Off or use it minimally This will ensure that the 286s circuitry produces superior audio without any artifacts...

Страница 19: ...ctively 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 generally not applicable to these applications Compressor Note The Compressor is OFF when the Compressor DRIVE is set to the off position Suggested Initial Compressor settings Smoothing Out A Vocal P...

Страница 20: ...multitrack 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 controls especially when they are used at more extreme settings towards fully clockwise distortion or artifacts may occur In this case lessen one of more of the controls in use For example higher DRIVE s...

Страница 21: ...cessive 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 works effectively to reduce hum rumble wind noise etc at the input LF DETAIL can restore low frequency power to objectionable levels if used too liberally This is especially true if the rear panel INSER...

Страница 22: ...vice 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 Standard Warranty which extends to the first end user After expiration of the warranty a reasonable charge will be made for parts labor and packing if you choose to use the factory service facility In...

Страница 23: ...ance 100Ω unbalanced 200Ω balanced Maximum Level 21dBu 20dBm 600Ω 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 ...

Страница 24: ...Adjustable 1 5 1 10 1 Maximum Depth 50dB Attack Time Program Dependent approximately 2ms at maximum attenuation Release Time Program Dependent approxiamtely 10ms dB DYNAMIC RANGE Typically 105dB Power Requirements 15 W USA 120VAC 60Hz 100VAC 50 60Hz Operating Voltage EU 230VAC 50 60Hz Operating Temperature 32 F to 113 F 0 C to 45 C Dimensions 1 75 x 5 75 x 19 45 x 175 x 485 mm Weight Net Weight 4 ...

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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