MODEL 1046
Operation Manual
IMPORTANT SAFETY INFORMATION
WARNING FOR YOUR PROTECTION
READ THE FOLLOWING:
KEEP THESE INSTRUCTIONS
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
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.
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 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 RADIATORS,
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 particularly 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.
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:
U 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.
U The core which is coloured blue must be connected to the terminal marked N or coloured black.
U 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
L
N
LIVE
NEUTRAL
E
EARTH GND
WIRE COLOR
Normal
Alt
BROWN
BLACK
BLUE
WHITE
GREEN/
GREEN
YEL
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.
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 rackmount 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.
IMPORTANT SAFETY INFORMATION
DECLARATION OF
CONFORMITY
ELECTROMAGNETIC
COMPATIBILITY
Manufacturer’s Name:
Manufacturer’s Address:
This unit conforms to the Product Specifications noted on the
Declaration of Conformity. Operation is subject to the following two
conditions:
UÊ this device may not cause harmful interference, and
UÊ 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.
dbx Professional Products
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
declares that the product:
Product name:
dbx 1046
Note: Product name may be suffixed by the letters-EU.
Product option:
None
conforms to the following Product Specifications:
Safety:
IEC 60065 -01+Amd 1
EMC:
EN 55022:2006 (N/A; Analog Product)
IEC61000-4-2
IEC61000-4-3
IEC61000-4-4
IEC61000-4-5
IEC61000-4-6
IEC61000-4-8
IEC61000-4-11
UÊ use only shielded interconnecting cables.
Supplementary Information:
U.K. MAINS PLUG WARNING
A molded mains plug that has been cut off from the cord is unsafe.
Discard the mains plug at a suitable disposal facility.
NEVER UNDER ANY CIRCUMSTANCES 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 product herewith complies with the requirements of
the:
Low Voltage Directive 2006/95/EC
EMC Directive 2004/108/EC.
RoHS Directive 2002/95/EC
WEEE Directive 2002/96/EC
With regard to Directive 2005/32/EC and EC Regulation
1275/2008 of 17 December 2008, this product is designed,
produced, and classified as Professional Audio Equipment
and thus is exempt from this Directive.
Roger Johnsen
Vice-President of Engineering
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
Date: June 14, 2010
European Contact: Your local dbx Sales and Service Office or
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.
Harman Music Group
8760 South Sandy Parkway
Sandy, Utah
84070 USA
Ph: (801) 566-8800
Fax: (801) 568-7583
Contents
Introduction ................................................................................ 2
Inspection .................................................................................... 2
Warranty ..................................................................................... 2
Connecting the 1046 to your system .......................................... 3
Operating Controls ...................................................................... 3
Rear Panel Operations ................................................................. 6
Applications ................................................................................. 7
Installation Considerations .......................................................... 8
Specifications ............................................................................... 9
Manual Contents
1
Introduction
Congratulations and thank you for your purchase of the dbx 1046 Quad Compressor Limiter. The dbx 1046 is
a high performance multifunctional unit designed to deliver all the flexibility and power that a professional
user demands. The dbx 1046 incorporates the new advanced dbx V2™ VCA for high system performance. We
recommend you take a moment to read through this Operation manual. It provides information that will assist
you in system set-up.
Inspection
Verify that the 1046’s package contains the following:
s
s
s
s
s
5NITACCORDINGTO-ODELNUMBERMARKEDONPACKAGE
!#0OWER#ORD
/PERATION-ANUAL
2EGISTRATION#ARD
2ACK-OUNT3CREWSAND7ASHERS
)FANYOFTHESEITEMSAREMISSINGCONTACTDBXCUSTOMERSERVICEAT
Warranty
1. The warranty registration card that accompanies this product must be mailed within 30 days after purchase
DATETOVALIDATETHISWARRANTY0ROOFOFPURCHASEISCONSIDEREDTOBETHEBURDENOFTHECONSUMER
DBXWARRANTSTHISPRODUCTWHENBOUGHTANDUSEDSOLELYWITHINTHE53TOBEFREEFROMDEFECTSINMATERIALS
and workmanship under normal use and service.
3. dbx liability under this warranty is limited to repairing or, at our discretion, replacing defective materials
THATSHOWEVIDENCEOFDEFECTPROVIDEDTHEPRODUCTISRETURNEDTODBX7)4(2%452.!54(/2):!4)/.FROMTHE
FACTORYWHEREALLPARTSANDLABORWILLBECOVEREDUPTOAPERIODOFTWOYEARS!2ETURN!UTHORIZATIONNUMBER
must 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 install the same additions or improvements on products previously
manufactured.
4HEFOREGOINGISINLIEUOFALLOTHERWARRANTIESEXPRESSEDORIMPLIEDANDDBXNEITHERASSUMESNORAUTHORIZES
any person to assume on its behalf any 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
performance of this warranty due to causes beyond their control.
2
Introduction
Connecting the 1046 to your system
To connect the 1046 to your system, refer to the following steps:
s4URNOFFALLEQUIPMENTBEFOREMAKINGANYCONNECTIONS
s-OUNTTHEINARACK
Install the 1046 in a rack with the rack screws provided. It can be mounted above or below anything
THATDOESNOTGENERATEEXCESSIVEHEAT!MBIENTTEMPERATURESSHOULDNOTEXCEEDƒ&ƒ#WHEN
equipment is in use. Although the unit is shielded against radio frequency and electromagnetic
INTERFERENCEEXTREMELYHIGHFIELDSOF2&AND%-)SHOULDBEAVOIDED
s-AKEAUDIOCONNECTIONSVIA8,2v423ORv43PLUGS
Both types of connectors for the inputs and outputs can be used for balanced or unbalanced
connections. The use of more than one connector at a time for the input/output pair could unbalance
balanced lines, cause phase cancellations, short a conductor to ground, or cause damage to other
equipment connected to the 1046.
s!PPLYPOWERTOTHE
#ONNECTTHE!#POWERCORDTOTHE!#POWERRECEPTACLEONTHEBACKOFTHEUNIT2OUTETHE!#POWER
cord to a convenient power outlet away from audio lines. The unit may be turned on and off via the
rear panel power switch or from a master equipment power switch.
Operating Controls
&RONT0ANEL
GAIN REDUCTION dB
30
-20
25
-10
20
15
10
6
INPUT / OUTPUT LEVEL dBu
3
CHANNEL ONE
0
1
-24
-18
-12
3:1
2:1
-6
0
+6
PROFESSIONAL PRODUCTS
+14
15
10
6
INP
3
CHANNEL TWO
0
+20 -30
Stereo
Couple
Bypass
-20 dB +20
OUTPUT GAIN
RATIO
-10
20
1
COMPRESSOR
4:1
+4
dBu OFF
PeakStopPlus
+10 1.5:1
8:1
OverEasy
-40 dBu +20
THRESHOLD
I/O Meter
1:1
:1
RATIO
COMPRESSOR
'AIN2EDUCTION-ETER4HISSTAGEMETERSHOWSTHEAMOUNTOFGAINREDUCTIONDUETOBOTHCOMPRESSIONAND
OR)NTELLIGENT0REDICTIVE,IMITING©DISPLAYINGGAINREDUCTIONFROMTOD"
#OMPRESSOR4HRESHOLD#ONTROL - This control sets the level above which compression occurs, and has a 60 dB
range.
CHANNEL FOUR
FUSE: REPLACE WITH SAME
TYPE FUSE AND RATING.
200-240V ATTENTION: UTILISER UN
50/60Hz FUSIBLE DE RECHANGE DE
MEME TYPE ET CALIBRE.
100-120V: 250mA 250V
SLOW BLOW
200-240V: T 125mA L 250V
100-120V
MADE IN USA
50/60Hz
MODEL 1046
-18
3:1
2:1
LIMITER
OPERATING
+4 dBu
Connecting the 1046 to LEVEL
your system-10 dBV
POWER: 25 WATTS
-24
-1
+6
:1
-20
25
+10
I/O Meter
1:1
30
+12
+10
8:1
OverEasy
-40 dBu +20
THRESHOLD
+
0
+10 1.5:1
GAIN REDUCTION dB
THRESHOLD
+18
4:1
-10
-30
+12
OUTPUTS
INPUTS
3
1:1
OUTPUT LEVEL (dB)
+20
+15
2:1
+10
4:1
+5
0
AM
−5
R
BE
:1
RED
Above Threshold
OverEasy Range
G
RE
EN
/VER%ASYš3WITCH/VER%ASYšPROVIDESASMOOTHTRANSITIONFROMTHECOMPRESSORSLINEARREGIONTOTHE
−15
Threshold
compressed region.
ThisBelow
smooth
transition greatly reduces compression artifacts and allows higher compression
RATIOSWHILESTILLMAINTAININGTHENATURALCHARACTERISTICSOFTHESIGNAL4HESWITCHLIGHTSTOINDICATE/VER%ASYš
−15 −10 −5
0 +5 +10 +15 +20
INPUT LEVEL (dB)
PROCESSINGISENABLED7HENCONVENTIONALHARDKNEEPROCESSINGISDESIREDDISABLETHE/VER%ASYšFUNCTION3EE
Figure 1 below.
−10
1:1 Unity
1:1
+20
+15
2:1
+10
4:1
+5
20:1
0
:1
-5
Rotation Point Threshold
-10
+15
2:1
+10
4:1
+5
0
A
−5
-15 -10
-5
0
G
GREEN
Below Threshold
−15
+5 +10 +15 +20
R
RED
:1
Above Threshold
OverEasy Range
RE
−10
-15
E
MB
EN
RED
Above Threshold
OUTPUT LEVEL (dB)
OUTPUT LEVEL (dB)
+20
Below Threshold
−15 −10 −5
0
+5 +10 +15 +20
INPUT LEVEL (dB)
INPUT LEVEL (dB)
&IGURE(ARD+NEE#OMPRESSION#URVEAND/VER%ASYš#OMPRESSION#URVE
1:1 Unity
+20
RED
Above Threshold
OUTPUT LEVEL (dB)
+15
#OMPRESSOR2ATIO#ONTROL- This control selects the ratio between
input and the output
levels for signals
2:1
+10
ABOVETHELEVELSETBYTHE#/-02%33)/.4(2%3(/,$CONTROL)TISADJUSTABLEBETWEENAND
.OTEWHEN
4:1
+5
/VER%ASYšPROCESSINGISSELECTEDTHERATIOTRANSITIONSSMOOTHLYFROMTHELINEARTOTHECOMPRESSEDREGION!S
20:1
0
THESIGNALEXCEEDSTHETHRESHOLDTHERATIOAPPROACHESTHERATIOSETBYTHE#/-02%33/22!4)/CONTROL
:1
-5
Rotation Point Threshold
Figure 2 shows the effect of 2:1 compression on a signal as -10
it rises above and falls below the threshold. Below
GREEN
Below Threshold
-15 the output
the threshold the signal is not affected. Above the threshold,
signal increases by only half of the
INCREASEIND"OFTHEINPUTSIGNALLEVEL)NOTHERWORDSWITHAD"INCREASEININPUTLEVELTHEOUTPUT
-15 -10 -5 0
+5 +10 +15 +20
increases by only 1 dB, hence the 2:1 compression ratio.
INPUT LEVEL (dB)
Signal Level (dBu)
Signal Level (dBu)
10
0
10
Input Signal
0
Above Threshold
-10
-20
Input Signal
Above Threshold
-10
-20
-30
Below Threshold
Time
-40
-30
-40
Output Signal
Below Threshold
Time
&IGURE#OMPRESSION%FFECTON3IGNAL,EVELWITHA2ATIOATAD"U4HRESHOLD
)NPUT/UTPUT,EVEL-ETER4HISSTAGEMETERDIRECTLYREADSTHEINPUTANDOUTPUTLEVELSWHENTHEREARPANEL
/0%2!4).',%6%,37)4#(ISINTHED"UPOSITION)NTHED"6POSITIONTHEINPUTSIGNALISBOOSTEDBY
D"THEDIFFERENCEBETWEEND"UANDD"6TOCONVERTASEMIPROD"6LEVELSIGNALTOTHEPROFESSIONALD"UINTERNALLEVELOFTHEWHILETHEOUTPUTSIGNALISATTENUATEDBYD"TOCONVERTBACKTOA
D"6LEVEL3INCETHEMETERISCALIBRATEDFORD"UOPERATIONITREADSABOUTD"HIGHERTHANTHEACTUAL
INPUTANDOUTPUTSIGNALLEVELSWHENTHE/0%2!4).',%6%,37)4#(ISSETTOD"6
4
Operating controls
)NPUT/UTPUT-ETER3WITCH4HISSWITCHSELECTSTHESIGNALFORMETERINGBYTHE).054/54054,%6%,-%4%2
The switch lights indicating the input signal is currently being sent to the meter. When the switch is in the out
position, the output signal is selected for metering, and the switch will not be illuminated.
/UTPUT'AIN#ONTROL4HISCONTROLSETSTHEOUTPUTGAINOFTHECOMPRESSOR)TCANBECONTINUOUSLYADJUSTED
BETWEEND"ANDD"5SETHISCONTROLTOCOMPENSATEFORSIGNALLEVELLOSSDUETOCOMPRESSIONANDTO
ADJUSTTHENOMINALOUTPUTLEVELOFTHEUNIT
"YPASS3WITCH - This switch bypasses the unit completely, “hard-wiring” the input directly to the output, and
the signal is not processed in any way. The switch will light indicating that the unit is currently bypassed.
0EAK3TOP0LUS©,EVEL#ONTROL - This control sets the level to which the output signal is reduced whenever
ITEXCEEDSTHISLEVEL)TCANBEADJUSTEDBETWEEND"UANDD"U/&&4HIS0EAK3TOP0LUS©LIMITER
uses a propietary dbx two-stage limiting process. The first stage is the Instantaneous Transient Clamp™
which clamps the signal with a soft logarithmic clamp function. This logarithmic function assures that the
SIGNALWILLNOTEXCEEDTHELEVELSETBYTHE0EAK3TOP0LUS©,%6%,CONTROLBYMORETHAND"TYPICALLYAND
that it will not introduce harsh artifacts. The second stage is a unique program limiter featuring Intelligent
0REDICTIVE,IMITING©)TSFUNCTIONISTOMONITORTHEINPUTSIGNALANDINTELLIGENTLYPREDICTTHEAMOUNTOFGAIN
reduction needed to keep the output signal below the ceiling set by the Instantaneous Transient Clamp™.
4HE0EAK3TOP0LUS©LIMITERMUSTCOMEAFTERTHE/54054'!).CONTROL)FTHE/54054'!).ISSETTOOHIGHAS
COMPAREDTOTHE0EAK3TOP0LUS©,%6%,CONTROLCONTINUOUSLIMITINGCANOCCUR7HILE0EAK3TOP0LUS©ISTYPICALLY
used as a protective function, creative effects can be achieved by intentionally driving the signal into heavy
0EAK3TOP0LUS©LIMITING'REATCAREHASGONEINTOTHEDESIGNOFTHE0EAK3TOP0LUS©LIMITERTOKEEPITACOUSTICALLY
transparent. Appropriate use of it can protect your gear while keeping the signal free of artifacts.
0EAK3TOP0LUS©4HRESHOLD,%$)NDICATOR4HIS,%$ILLUMINATESWHENTHEOUTPUTSIGNALEXCEEDSTHELEVEL
SETBYTHE0EAK3TOP0LUS©,%6%,CONTROLINDICATINGTHAT0EAK3TOP0LUS©LIMITINGISOCCURRING
&IGUREILLUSTRATESTHEPROTECTIVEACTIONOFTHE0EAK3TOP0LUS©LIMITER4HESIGNALWITHTHETHINLINEWEIGHT
represents an unaltered input signal. As you can see, peaks of the input signal exceed the clamping level. The
signal with the heavier line weight represents the output signal. The peaks of the input signal which exceeded
the clamping level are not allowed to exceed this level at the output. This instantaneous protective action is
invaluable for driver protection in speaker systems and for digital recording where it is desirable to record as
“hot” as possible, while still avoiding the disastrous result of running out of headroom. Following this clamping
ACTION)NTELLIGENT0REDICTIVE,IMITING©TAKESOVERTYPICALLYWITHINMSASLONGASTHEINPUTSIGNALCONTINUES
TOEXCEEDTHE0EAK3TOP0LUS©THRESHOLD4HISPROGRAMLIMITERQUICKLYATTENUATESTHEINPUTSIGNALTOALEVEL
SAFELYBELOWTHECLAMPINGLEVELTYPICALLYD"LOWERTHANTHECLAMPINGLEVEL4HE0EAK3TOP0LUS©LEVELCONTROLIS
calibrated to this lower level, so if an absolute ceiling is required, set the level 2 to 3 dB below the front panel
setting.
4HEATTACKANDRELEASETIMESOFTHE)NSTANTANEOUS4RANSIENT#LAMP©AREZEROWHILETHE)NTELLIGENT0REDICTIVE
Limiting™ attack and release times are program-dependent. That is, for larger excursions over the threshold, the
ATTACKTIMESPEEDSUPANDFORSMALLEREXCURSIONSOVERTHETHRESHOLDTHEATTACKTIMESLOWSDOWN3IMILARLYFOR
LARGEEXCURSIONSOVERTHETHRESHOLDWHICHCAUSEMORE0EAK3TOP0LUS©GAINREDUCTIONTHERELEASETIMEINCREASES
and is roughly proportional to the amount of gain reduction that occurred.
Operating Controls
5
Output Signal
}
Input Signal
Intelligent Predictive Limiting™
Attack Time
2 dB Typically
Release Time
Output Signal
Time
&IGURE0ROTECTIVE!CTIONOFTHE0EAK3TOP0LUS©,IMITER
3TEREO#OUPLE3WITCH - These switches change the 1046 from four independent compressors into two stereo
compressors. In stereo mode, Channel 1 is the master and Channel 2 is its slave, and Channel 3 is the master
ANDCHANNELISITSSLAVE%ACHOFTHE#HANNELANDCONTROLSANDSWITCHFUNCTIONSWILLBEOVERRIDENAND
CONTROLLEDBYTHE#HANNELANDCONTROLSANDSWITCHESRESPECTIVELYEXCEPTFORTHE)/-ETERAND"YPASS
SWITCHES!LSO#HANNELSANDS#OMPRESSOR4HRESHOLDAND0EAK3TOP0LUS©4HRESHOLDMETERSWILLBEDISABLED
WHILETHESESLAVECHANNELS'AIN2EDUCTIONMETERSWILLINDICATETHEAMOUNTOFGAINREDUCTIONOCCURRINGAS
ONTHEIRMASTERS'AIN2EDUCTION-ETERS!LLCHANNELSHAVEEQUALPRECEDENCEASFARASSIGNALPROCESSINGIS
CONCERNED4HEDBXUSES4RUE2-30OWER3UMMING©ANEXTREMELYACCURATEANDMUSICALWAYTOCOMBINE
DETECTOROUTPUTSINASTEREOSITUATION4HESWITCHWILLLIGHTTOINDICATETHATTHEISINTHE3TEREO#OUPLE
mode.
Rear Panel Operations
2EAR0ANEL
30
FUSE: T 300mA L 250V
!#0OWER2ECEPTACLE5SETHESUPPLIED!#CABLETOCONNECTTHEUNITTO!#POWER4HE!#RECEPTACLEINCLUDES
ANINTEGRALPULLOUTFUSEDRAWERWHICHCONTAINSTWOFUSESTHEACTIVEFUSEANDASPAREFUSE2EPLACETHEFUSE
with the same type and rating only.as indicated on the rear panel.
!UDIO)NPUTS%ACHCHANNELFEATURESBOTH8,2ANDv423ELECTRONICALLYBALANCEDINPUTS)NPUTSMAYBEUSED
INABALANCEDORUNBALANCEDCONFIGURATION.OTETHATTHE8,2ANDINPUTSMAY./4BEUSEDSIMULTANEOUSLY
6
Rear panel operations
!UDIO/UTPUTS%ACHCHANNELFEATURESBOTH8,2ANDv423SERVOBALANCEDOUTPUTS/UTPUTSMAYBEUSED
INABALANCEDORUNBALANCEDCONFIGURATION5NLIKETHEINPUTSBOTHTHE8,2ANDTHEvOUTPUTSMAYBEUSED
SIMULTANEOUSLY!NOUTPUTTRANSFORMEROPTIONISAVAILABLEWHENVERYLONGCABLEDISTANCESAREREQUIREDSEE
h3PECIFICATIONSv
/PERATING,EVEL3WITCH4HISSWITCHSELECTSBETWEENAD"6ANDD"UNOMINALOPERATINGLEVEL7HEN
THESWITCHISINTHEINPOSITIONAD"6OPERATINGLEVELISSELECTED7HENITISINTHEOUTPOSITIOND"UIS
selected. This switch affects both the input and the output levels.
Applications
&ATTENING+ICK$RUMSAND#OMPRESSING/THER$RUMS
Weak, flabby kick drums often have too much boom, and not enough slap. To tighten them up, start with
THEADJUSTEDFORAMEDIUMTOHIGH2!4)/EGADJUSTTHE4(2%3(/,$CONTROLSOTHATTHE'!).
2%$5#4)/.METERSSHOWD"OFGAINREDUCTIONTHENINCREASETHE2!4)/IFNECESSARY)N/VER%ASYšMODE
THETAKESSLIGHTLYLONGERTOREACTTHANIN(ARD+NEEMODEANDWILLTHEREFOREEMPHASIZETHESLAPATTHE
beginning of the note and reduce the boominess of its body. The 1046 also works well for tightening snare
drums and tom toms and can be used with drum machines to effectively alter the character of any electronic
drum sound.
2AISINGA3IGNAL/UTOFA-IX
3INCEREDUCINGDYNAMICRANGEINCREASESTHEAVERAGESIGNALLEVELBYASMALLAMOUNTASINGLETRACKCANBERAISED
OUTOFAMIXBYBOOSTINGITSLEVELSLIGHTLYANDAPPLYINGCOMPRESSION3TARTWITHA2!4)/ANDARELATIVELYLOW
4(2%3(/,$SETTINGD"U!DJUSTBOTHCONTROLSASNECESSARY
#OMPRESSORSHAVEALSOBEENUSEDTOBRINGVOCALSTOTHEFOREFRONTOFAMIXINVOLUMERESTRICTEDSTUDIOSEG
HOMESTUDIOS3TARTBYADDINGAFOAMWINDSCREENTOTHEMICIFITDOESNTHAVEONE3ETTHE2!4)/TOAND
THE4(2%3(/,$TOD"U7ITHYOURMOUTHAPPROXIMATELYINCHESFROMTHEMICSINGTHEVOCALPARTBUTWITH
LESSVOLUMETHANNORMAL5SEPHRASINGTOGIVETHEPARTSOMEINTENSITY!NEQUALIZEREGADBX0ARAMETRIC
%QUALIZERDBX3ERIES'RAPHIC%QUALIZERSORAVOCALEFFECTSDEVICEEGADBXDIGITALREVERBCANBE
added to further define the performance.
.OTE When compressing a stereo program with a 1046, the factors affecting a compression curve and
THEACTUAL2!4)/AND4(2%3(/,$SETTINGSARETHESAMEASTHOSEPREVIOUSLYCOVEREDWITHREFERENCE
to single channels of program material. However, it will generally be found that large amounts of
compression are more audible in a mixed stereo program than they might be on the separate tracks that
were mixed to create the program.
3MOOTHINGOUT-ICROPHONE,EVELS
When distance is created between the vocalist and the microphone there will be a variation in the signal level.
3TARTWITHLOWCOMPRESSIONAROUNDTOSMOOTHOUTANYVARIATIONS,IMITINGALSOBENEFITSINTELLIGIBILITYBY
allowing low-level input signals to be reproduced through the system at higher volume.
3MOOTHINGOUT-USICAL)NSTRUMENT,EVELS
#OMPRESSIONSMOOTHSOUTTHEVARIATIONSOFLOUDNESSAMONGINSTRUMENTS5SINGTHECANALSOINCREASETHE
instrument’s sustain. Compress the instrument’s output with a ratio of about 4:1.
3PEAKER0ROTECTION
Compressors are frequently used to prevent excessive program levels from distorting power amps and/or
Applications
7
DAMAGINGDRIVERSINASOUNDREINFORCEMENTSYSTEMWHETHERYOUREDOINGAUDITORIUMCHURCHORCLUBSOUND
ENGINEERINGORAREAMOBILE$*ORLIKETOPUSHTHELIMITSOFYOURHOMESAUDIOENTERTAINMENT CENTER3ETTHE
FORLIMITING(ARD+NEEMODE/NWITHA2!4)/OFORGREATERANDADJUSTTHE4(2%3(/,$TOPROVIDE
D"ORMOREOFCOMPRESSIONJUSTAFEWD"BELOWTHEINPUTCLIP&ORLOWLEVELSIGNALSTHEWONTCHANGE
gain, but if large signals come along, the gain will be reduced to prevent clipping and save sensitive system
components from excessive heat buildup or other types of damage.
.OTE0EAK3TOP0LUS©,IMITINGCANALSOBEUSEDTOPREVENTSPEAKERDAMAGE
0REVENTING$IGITAL2ECORDING/VERLOAD
3OMEDIGITALRECORDERSANDSAMPLERSPRODUCEAUDIBLEDISTORTIONWHENTHEYEXCEEDTHEIRMAXIMUMOPERATINGLEVEL
4HECANBEUSEDTOENSURETHATAUDIOINPUTDOESNOTOVERLOADADIGITALRECORDERS!$ANALOGTODIGITAL
converters. The 1046 can perform this function quietly enough for all digital media. To use the 1046 so that no
CHANGESINGAINOCCURUNLESSANEMERGENCYARISESWILDLYEXCESSIVELEVELSSET(ARD+NEEMODE/NTHE2!4)/TO
ANDTHE4(2%3(/,$HIGHESTLEVELBEFOREDIGITALOVERLOAD
.OTE0EAK3TOP0LUS©LIMITINGCANALSOBEUSEDTOPREVENTRAUCOUSSOUNDINGDIGITALOVERLOAD.
Installation Considerations
(OOKUPSAND#ABLING4HEISDESIGNEDFORNOMINALD"6ORD"ULEVELS4HECANBEUSEDWITH
either balanced or unbalanced sources and the outputs can be used with either balanced or unbalanced loads,
provided the proper cabling is used.
.ORMAL"ALANCED#ONNECTIONSFOR)NPUTSAND/UTPUTS
Connection
8,2
423v*ACK
'ROUND 0IN 3LEEVE (IGH 0IN 4IP
,OW
0IN 2ING .ORMAL5NBALANCED#ONNECTIONSFOR)NPUTSAND/UTPUTS
Connection
8,2
423v*ACK
'ROUND 0IN 3LEEVE (IGH 0IN 4IP
,OWGROUND
0IN 2ING 43v*ACK
3LEEVE 4IP
3LEEVE Tie pin 3 to the ground for unity gain in/out of the 1046 when using unbalanced input connections to
balanced output connections or balanced input connections to unbalanced output connections. To do
otherwise won’t hurt the unit but will result in unmatched input to output levels, and the level control will
not be properly calibrated.
8
Installation considerations
Specifications
Input
Connectors:
Type:
Impedance:
Max Input Level:
CMRR:
Output
Connectors:
Type:
Impedance:
Max Output Level:
System Performance
Bandwidth:
Frequency Response:
Noise:
Dynamic Range:
THD+Noise:
IMD:
Interchannel Crosstalk:
VCA:
Stereo Coupling:
Compressor
Threshold Range:
Ratio:
Threshold Characteristic:
Attack/Release Characteristic:
Attack Time:
Release Time:
Output Gain:
Limiter
Threshold Range:
Ratio:
Limiter Type:
Stage 1:
Attack Time:
Release Time:
Stage 2:
Attack Time:
Release Time:
Function Switches
OverEasy®:
I/O Meter:
Bypass:
Operating Level (rear panel):
Stereo Couple:
Indicators
Gain Reduction
Input/Ouptut Level
Limiter Threshold:
Function Switches:
Female XLR and 1/4” TRS (Pin 2 and tip hot)
Electronically balanced/unbalanced, RF filtered
Balanced > 50 k , unbalanced >25 k
> +24 dBu balanced or unbalanced
40 dB; Typically >55 dB at 1 kHz
Male XLR and 1/4” TRS (Pin 2 and tip hot)
Servo-balanced/unbalanced, RF filtered
Balanced 60 , unbalanced 30
> +21 dBu, >+20 dBm balanced/unbalanced
20 Hz to 20 kHz, +0/-0.5 dB
0.35 Hz to 200 kHz, +0/-3 dB
< -94 dBu, unweighted, 22 kHz measurement bandwidth
> 118 dB, unweighted
0.009% typical at +4 dBu, 1 kHz unity gain
0.09% typical at +20 dBu, 1 kHz, unity gain
< 0.1% any amount of compression up to 40 dB, 1 kHz
< 0.1% SMPTE
< -85 dB, 20 Hz to 20 kHz
dbx V2™
True RMS Power Summing
-40 dBu to +20 dBu
1:1 to :1
Selectable OverEasy® or hard knee
AutoDynamic™
Program-dependent, typically 15ms for 10 dB, 5 ms for 20 dB, 3 ms for 30 dB
Program-dependent, typically 125 dB/sec
-20 to +20 dB
+4 dBu to +22 dBu (off)
:1
PeakStopPlus™ two-stage limiter
Instantaneous Transient Clamp™
Zero
Zero
Intelligent Predictive Limiting™
Program-dependent, typically <5 msec
Program-dependent, typically 22 dB/sec
Activates the OverEasy® compression function.
Switches between monitoring input and output levels on the Input/Output Level meter.
Activates the direct input-to-output hard-wire bypass.
Switches the nominal operating level between -10 dBV and +4 dBu simultaneously for both input and output levels.
Couples channels in stereo pairs. Channels One and Three become the master channels.
8 segment LED bar graph at 1, 3, 6, 10, 15, 20, 25, and 30 dB
8-segment LED bar graph at -24, -18, -12, -6, 0, +6, +12, and +18 dBu
1 LED to indicate PeakStopPlus™ limiting
LED indicator for each front-panel switch
Specifications
9
Power Supply
Operating Voltage:
Power Consumption:
Fuse:
Mains Connection:
Physical
Dimensions:
Weight:
Shipping Weight:
Factory selected: 100-120 VAC 50/60 Hz or 200-240 VAC 50/60 Hz
30 Watts
100-120 VAC: T 300 mA L 250V
200-240 VAC: T 160 mA L 250V
IEC receptacle
1.75” H x 19” W x 9” D
44.5 x 483 x 229 mm
7.4 lbs.
3.4 kg
9.8 lbs.
4.4 kg
Options
Output Transformer
Per Channel:
Jensen® JT-123-dbx or BCI™ RE-123-dbx
Note: Specifications subject to change.
10
Specifications
Notes
3OUTH3ANDY0KWY
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0HONE
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%MAILCUSTOMER DBXPROCOM
Website: www.dbxpro.com
6#
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