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WARNING

FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:

WATER AND MOISTURE:

Appliance should not be used near water (e.g. near a bathtub, wash-

bowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should
be taken so that objects do not fall and liquids are not spilled into the enclosure through open-
ings.

POWER SOURCES:

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:

Precautions should be taken so that the grounding or polar-

ization means of an appliance is not defeated.

POWER CORD PROTECTION:

Power supply cords should be routed so that they are not likely to

be walked on or pinched by items placed upon or against them, paying particular attention to
cords at plugs, convenience receptacles, and the point where they exit from the appliance.

SERVICING:

To reduce the risk of fire or electric shock, the user should not attempt to service

the appliance beyond that described in the operating instructions. All other servicing should be
referred to qualified service personnel.

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, attach-

ment plug, or both, depending on the available power source at installation. Connect this equip-
ment 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.

SAFETY INSTRUCTIONS 

NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD.

WARNING: THIS APPLIANCE MUST BE EARTHED.

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 ter-

minal 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 direct-
ly to the unit's chassis.

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.

LIVE

E

NEUTRAL

EARTH GND

CONDUCTOR

L

N

BROWN

BLUE

GREEN/YEL

BLACK

Normal

Alt

WIRE COLOR

WHITE

GREEN

U.K. MAINS PLUG WARNING

A

moulded mains plug that has been cut off from the cord is unsafe. Discard

the mains plug at a suitable disposal facility.

NEVER UNDER ANY CIRCUM-

STANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A
13 AMP POWER SOCKET.

Do not use the mains plug without the fuse cover

in place. Replacement fuse covers can be obtained from your local retailer.
Replacement fuses are 13 amps and MUST be ASTA approved to BS1362.

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 manufac-
turer’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.

C A U T I O N

A T T E N T I O N :

 

R I S Q U E   D E   C H O C   E L E C T R I Q U E   -   N E   P A S   O U V R I R

W A R N I N G :

 

T O   R E D U C E   T H E   R I S K   O F   F I R E   O R   E L E C T R I C

S H O C K   D O   N O T   E X P O S E   T H I S   E Q U I P M E N T   T O   R A I N   O R   M O I S T U R E

R I S K   O F   E L E C T R I C   S H O C K

D O   N O T   O P E N

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 harmful interference, and 
• this device must accept any interference received, including interference that

may cause undesired operation.

Operation of this unit within significant electromagnetic fields should be avoided.

• use only shielded interconnecting cables.

DECLARATION OF CONFORMITY

ManufacturerÕs Name:

dbx Professional Products

ManufacturerÕs Address:

8760 S. Sandy Parkway
Sandy, Utah 84070, USA

declares that the product:

dbx 786

conforms to the following Product Specifications:

Safety:

EN 60065 (1993)
IEC65 (1985) with Amendments 1, 2, 3

EMC:

EN 55013 (1990)
EN 55020 (1991)

Supplementary Information:

The product herewith complies with the requirements of
the Low Voltage Directive 73/23/EEC and the EMC
Directive 89/336/EEC as amended by Directive
93/68/EEC.

dbx Professional Products
Vice-President of Engineering
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
January 19, 1998

European Contact:  Your Local dbx Sales and Service Office or 

International Sales Office
68 Sheila Lane
Valparaiso, Indiana
46383, USA
Tel: (219) 462-0938
Fax: (219) 462-4596

Summary of Contents for 786

Page 1: ...Precision Mic Preamp 786 Owner s Manual...

Page 2: ...t 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 simultan...

Page 3: ...nsole Signal Path 3 Connection To Your System 4 Operating Controls 6 Front Panel Description 6 Rear Panel Description 8 Technical Support Factory Service 10 Warranty 11 Specifications 11 Block Diagram...

Page 4: ...in mind We wanted to create a pristine mic pre that would carefully reveal the very subtle nuances of any source device To that end the 786 uses premium parts and as short a signal path as possible t...

Page 5: ...t upon the signal EQ dynamics panning etc Unfortunately console preamp circuits are often not given enough room on the circuit board or high quality parts It is for this reason that outboard pre amps...

Page 6: ...red settings including phantom power and Low Z Connect the audio output of the 786 to the console s LINE INPUT and ensure that the con sole s input selection switch is set to LINE and the console s ga...

Page 7: ...a compressor limiter in the path before the recorder The perfect com panion product to the 786 is the dbx 160SL Stereo Compressor Also when recording with this method remember that desired gain change...

Page 8: ...rated to the frequency at which 3dB of boost or cut occurs when the Detail con trol is set at 16dB or 16dB respectively Detail Control This control adjusts the amount of boost or cut of the high frequ...

Page 9: ...or consistent performance 20dB Pad Switch and LED This switch inserts a 20dB attenuator circuit into the signal path from the microphone input The pad is inserted before the signal is routed through t...

Page 10: ...ssis Ground Binding Post The green Chassis Ground binding post is supplied to give the user another method to provide com prehensive grounding options for any installation It is easy to think of the b...

Page 11: ...e to any 50Hz or 60Hz AC power source of the correct line voltage for your area Make sure this voltage is also correct for the voltage marked on the back of the 786 Always make AC power connections wi...

Page 12: ...registration card and send it in please do so now Before you return a product to the factory for service we recommend you refer to the manual Make sure you have correctly followed installation steps...

Page 13: ...y obligation or liability in connection with the sale of this product In no event shall dbx or its dealers be liable for special or consequential damages or from any delay in the perfor mance of this...

Page 14: ...low LED to indicated when 12 dB octave mode is selected Peak Red LED to indicated when signal is within 3 dB of clipping Sense points are out put of M8 gain module Course Gain output of Fine Control a...

Page 15: ...in Switching Relay Bank Coarse Gain Rotary Switch 15dB 20dB 65dB M8 Mic Pre Module 48V Relay Relay Super Low Z 20dB Pad Phase Invert Relay Relay Relay Relay Rectifier Unbalance Ground Spectrum Detail...

Page 16: ...Utah 84070 Phone 801 568 7660 Fax 801 568 7662 Int l Fax 603 672 4246 Questions or comments E mail us at customer dbxpro com or visit our World Wide Web home page at www dbxpro com A Harman Internatio...

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