Behringer TRUTH B2031 Bedienungsanleitung

www.behringer.com

Version 1.1 January 2000

User´s Manual

Bedienungsanleitung

TRUTH B2031

acc. to the Directives

89/336/EWG and 73/23/EWG

We, BEHRINGER INTERNATIONAL GmbH

Hanns-Martin-Schleyer-Straße 36-38

D - 47877 Willich

Name and address of the manufacturer or the introducer of the product on the market who is established in the EC

herewith take the sole responsibility to confirm that the product:

TRUTH B2031

Type designation and, if applicable, Article-No

which refers to this declaration, is in accordance with the following standards or

standardizeddocuments:

xEN 60065 xEN 61000-3-2

xEN 55020 xEN 61000-3-3

xEN 55013

Thefollowing operation conditionsand installation arrangementshave to be

presumed:

acc. to Operating Manual

B. Nier, President Willich, 01.06.1999

Name, address, date and legally binding signature of the person responsible

EG-Declaration of Conformity

INTERNATIONAL GmbH

This symbol, wherever it appears,

alerts you to the presence of

uninsulateddangerous voltage inside

the enclosure - voltage that may be

sufficient to constitute a risk of shock.

This symbol, wherever it appears, alerts

you to important operating and

maintenance instructions in the

accompanying literature. Read the

manual.

SAFETY INSTRUCTIONS

CAUTION: To reducethe risk ofelectrical shock, do notremove

thecover(orback). No user serviceable partsinside;

refer servicing to qualified personnel.

WARNING: To reduce the risk of fire or electrical shock, do not

expose this appliance to rain or moisture.

DETAILED SAFETY INSTRUCTIONS:

All the safety and operation instructions should be read before the appliance is operated.

Retain Instructions:

The safety and operating instructions should be retained for future reference.

Heed Warnings:

All warnings on the appliance and in the operating instructions should be adhered to.

Follow instructions:

Alloperation and userinstructionsshould be followed.

Water and Moisture:

The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a

wet basement, or near a swimming pool etc.).

Ventilation:

The appliance should be situated so that its location or position does not interfere with its proper ventilaton.

For example, the appliance should not be situated on a bed, sofa rug, or similar surface that may block the

ventilation openings: or placed in a built-in installation, such as a bookcase or cabinet that may impede the

flowof air throughthe ventilation openings.

Heat:

The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other

appliances (including amplifiers) that produce heat.

Power Source:

Theappliance should be connectedtoa power supply onlyofthe type described intheoperating instructions

or as marked on the appliance.

Grounding or Polarization:

Precautions should be taken so that the grounding or polarization 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 and plugs, convenience receptacles and the point

where they exit from the appliance.

Cleaning:

The appliance should be cleaned only as recommended by the manufacturer.

Non-use Periods:

The power cord of the appliance should be unplugged from the outlet when left unused for a long period of

time.

Object and Liquid Entry:

Careshouldbetakensothat objects do not fall and liquidsarenotspilledintotheenclosurethroughopenings.

Damage Requiring Service:

The appliance should be serviced by qualified service personnel when:

- The power supply cord or the plug has been damaged; or

- Objects have fallen, or liquid has been spilled into the appliance; or

- The appliance has been exposed to rain; or

- The appliance does not appear to operate normally or exhibits a marked change in performance; or

- The appliance has been dropped, or the enclosure damaged.

Servicing:

TheusershouldnotattempttoservicetheappliancebeyondthatwhichisdescribedintheOperatingInstructions.

All other servicing should be referred to qualified service personnel.

FOREWORD

DearCustomer,

Welcome to the team of TRUTH B2031 users and thank you very much for expressing your confidence in

BEHRINGERproducts by purchasing thisstudiomonitor.

It is one of my most pleasant tasks to write this letter to you, because it is the culmination of many months of

hardworkdeliveredby our engineering team to reacha very ambitiousgoal: making anoutstanding reference

studiomonitor that will becomea standardtool.Thetask to design theTRUTHB2031certainly meant a great

dealof responsibility, which weassumedbyfocusing on you,thediscerninguser and musician. Italsomeant

a lot of work and night shifts to accomplish this goal. But it was fun, too. Developing a product usually brings

a lot of people together, and what a great feeling it is when everybody who participated in such a project can

be proud of what we’ve achieved.

Itisourphilosophytoshareourjoy with you, because you are the most important memberof the BEHRINGER

family. With your highly competent suggestions for new products you’ve greatly contributed to shaping our

company and making it successful. In return, we guarantee you uncompromising quality (manufactured

under ISO9000 certified management system) as well as excellent technical and audio properties at an

extremely affordable price. All of this will enable you to fully unfold your creativity without being hampered by

budgetconstraints.

Weareoften asked how we areable topossible toproduce suchhigh-grade devicesat suchunbelievably low

prices. The answer is quite simple: it’s you, our customers! Many satisfied customers means large sales

volumes enabling us to get better conditions of purchase for components, etc. Isn’t it only fair to pass this

benefit back to you? Because we know that your success is our success, too!

Iwouldliketothank all people whose help on “ProjectTRUTH B2031“ hasmade it allpossible. Everybody has

made very personal contributions, starting from the designers of the unit via the many staff members in our

company to you, the user of BEHRINGER products.

My friends, it’s been worth the trouble!

Thank you very much,

UliBehringer

B2031

TRUTH

2-way active high-resolution studio monitor

sUltra-linear frequency response from 50 Hz to 21 kHz

sTwobuilt-in high poweramps with 150/75 Wattsand enormous powerreserves

sExtremelyhigh-resolutiontweeter with ferrofluid-cooled titanium dome

sLong-throw 8.75" woofer with special polycarbonate diaphragm and sturdy cast aluminum chassis

sControlleddispersionpattern through phase-optimized wave guidesystem

sExtremelylarge "sweet spot" throughvertically/horizontallybalanceddispersion characteristics

sActive frequency crossover with 4th order Linkwitz-Riley filters

sFlexibleadaptation to roomacoustics,incl.subwoofer operation

sOverload protection through separately controlled limiter for low- and high-frequency ranges

sAutomaticstandbyswitching

sElectromagneticshielding for minimuminterference

sDelivery of "matched pairs". Measurement protocol included

sLow-vibrationE1 MDF cabinet

sServo-balancedinputs on XLR andTRSconnectors

sManufacturedunder ISO9000 certified ManagementSystem

TABLE OF CONTENT

1. INTRODUCTION ......................................................................................................................7

1.1 Theconcept.................................................................................................................................... 7

1.2 Before you start .............................................................................................................................. 7

1.3 Controlelements ............................................................................................................................. 8

2. APPLICATIONS .....................................................................................................................10

2.1 Connection ................................................................................................................................... 10

2.2 Levelsetting .................................................................................................................................. 10

2.3 Recommendedsetup .....................................................................................................................11

2.4 Adapting theTRUTH tothe roomacoustics ................................................................................... 12

3. INSTALLATION ......................................................................................................................14

3.1 Speakersetup............................................................................................................................... 14

3.2 Mainsvoltage ................................................................................................................................ 14

3.3. Audio connections ........................................................................................................................ 14

4. SPECIFICATIONS ..................................................................................................................16

5. WARRANTY ...........................................................................................................................17

1. INTRODUCTION

Congratulations!With ournewBEHRINGERTRUTHB2031youhavepurchasedone ofthebesthigh-resolution

active studio monitors available. It is a tool that reproduces your program material with highest fidelity and

balance, positioning sound sources accurately on the stereo basis.

We recommend that you experiment with your B2031 away from the pressures of a recording session, in

order to get a feel for it. It will be a good idea to listen to your favorite CD's over the TRUTH, so that you can

get an impression of the neutral sound this speaker produces - which might be somewhat unusual at first!

1.1 The concept

The B2031 is equipped with two separate power amps for the woofer and tweeter ranges. With 150 and 75

Watts respectively, these amps have lots of power reserves. In the low-frequency range we used an 8.75"

soft-suspension speaker with a sturdy cast aluminum chassis. Its effective operating range is expanded

downwards by a special bass reflex system. The innovative shape of the reflex tunnel reduces airflow noise

even at highest sound pressure levels. In the high-frequency range a titanium-dome tweeter ensures an

extremelyfine signal resolution.Sophisticated circuitry is usedto protect bothchassisand amplifiers against

overloading. Both speakers are electromagnetically shielded, so that you can operate the TRUTH in close

proximity to your computer monitor or TV set. The individual frequency ranges driving the speakers are

derivedbymeans of an activecrossovernetwork,which allows for thepreciseseparationof frequency bands

and the perfect adaptation of two speakers to each other. Rear-mount switches enable you to configure the

crossover networks, so as to adapt the speakers to specific room acoustics. More on this later.

High-quality components and design

The philosophy behind BEHRINGER products guarantees a no-compromise circuit design and employs the

best choice of components. The operational amplifiers 4580 which are used in the TRUTH B2031, are

exceptional. They boast extreme linearity and very low distortion characteristics. To complement this design

thechoice of components includeshigh-toleranceresistors and capacitors,high-gradeswitchesand several

other stringently selected elements. Additionally, the TRUTH is manufactured in compliance with a ISO9000

certifiedmanagementsystem.

1.2 Before you start

YourTRUTH was carefully packedinthefactory and the packagingisdesignedto protect theunit fromrough

handling.Nevertheless,werecommend that you carefully examine thecarton and itscontents forany signs of

physical damage, which may have occurred during transit.

+If the unit is damaged, please do NOT return it to BEHRINGER, but notify your dealer and the

shippingcompany immediately, otherwiseclaimsfor damage orreplacementmay not begranted.

Shipping claims must be made by the consignee.

The TRUTH must be placed on a flat and stable surface. Be sure that there is enough air space around the

unitforcooling and please donot placetheTRUTHonhigh-temperature devices such aspower amps,etc.to

avoidoverheating.

+Before you connect the TRUTH to the mains, please make sure that your local voltage matches

the voltage required by the unit!

Please use the enclosed power cord to connect the unit to the mains. The cord complies with all applicable

safetystandards.

+Please note that all units must be grounded properly. For your own safety, you should never

remove any ground connectors from electrical devices or power cords or render them

inoperative.

Further information can be found in chapter 3 "INSTALLATION".

1. INTRODUCTION

1.3 Control elements

The control elements described in the following are the same on both speakers.

Fig. 1.1: Front panel display elements

. This LED lights up as soon as you switch on the speaker.

LIMIT

. Lights up as soon as one of the built-in protections is activated.

Fig.1.2: Rearpanelinput connectors

All connectors of the TRUTH face downwards, so as to allow you to place the speaker as closely to a wall as

possible.

INPUT

. This balanced TRS connector is used to connect the speaker to a signal source.

INPUT

. This XLR connector is used to connect the speaker to a balanced signal source.

5Usethe

POWER

switchto put theTRUTHinto operation.

+The TRUTH should be the last device in the signal chain to be switched on and the first to be

switched off.

FUSE

holder

/VOLTAGE

selector and

MAINS

connector. Please make sure that your local voltage

matches the voltage indicated on the unit, before you attempt to connect and operate the TRUTH.

Blown fuses may only be replaced by fuses of the same type and rating. Use the enclosed power cord

to connect the unit to the mains. Please note the instructions given in chapter 3 “INSTALLATION”.

Fig. 1.3: The serial number of your TRUTH

1. INTRODUCTION

SERIALNUMBER

.Pleasetakethetimetohavethewarrantycardfilledoutcompletelybyyourspecialized

dealer, and return it within 14 days after the date of purchase, so as to be entitled to benefit from our

extendedwarranty.

Fig. 1.4: Rear panel control elements

INPUT TRIM

. Use this control to adapt the TRUTH's input sensitivity to the signal source.

POWERMODE

.This switch allows youto togglebetween"ON","OFF" and "AUTO" power-upmodes.

MUTE LOW

. Disables the woofer for servicing and maintenance.

MUTE HIGH

. Disables the tweeter for servicing and maintenance.

Fig. 1.5: Rear panel switches

LOW FREQUENCY

. With this switch you can adapt the woofer range to a subwoofer system or

emulatethe sound characteristicsofsmallspeaker systems.

ROOMCOMPENSATION

.Formaximum flexibilitytheTRUTHfeaturesaswitch thatadjuststhespeaker

depending on its setup position.

HIGH FREQUENCY

. This switch adapts the speaker's frequency response to the damping

characteristics of the control room.

1. INTRODUCTION

2. APPLICATIONS

2.1 Connection

Use the enclosed power cord to connect the B2031 to the mains. To avoid ground loops, both speakers and

the mixing console should be fed from the same outlet. For your convenience, the TRUTH features an

automatic power-up system which activates the B2031 as soon as a signal is present on its input, and

deactivatesthe speaker after signalpauses ofmorethanfive minutes.

Function: The switch for the automatic power-up system has three positions. When set to OFF, the

speaker is completely switched off and cannot be activated with switch 5. Position AUTO allows the

automatic operation as mentioned above. In position ON, the B2031 is activated all the time and can be

switched off only with switch 5.

+Be sure to switch the TRUTH off with switch 5during longer pauses.

Nowconnect both speakers toyourconsoleby means of commercialXLRorTRS cables. Since theB2031is

an active speaker system, instead of conventional speaker cables you will need normal TRS or XLR cables.

Connect the TRUTH to the Control Room outputs of your console, so as to be able to control the monitoring

volumeindependentlyof the Main Mixlevel.Ifyour console does nothave suchoutputs,youcan also use the

Aux,TapeorMainoutputs.However,in this case the speaker volume cannot beset independently of theMain

Mixlevel,i.e. you must adjust themonitoring volumeon theTRUTH. Pleaseconsult theoperating instructions

accompanying your console to find out whether it has balanced or unbalanced outputs. Connect these

outputstotheTRS 3or XLR 4input. If possible use thebalanced connectors, soas to avoidinterference

andhum.Itwon'thelp,however,to connect unbalanced outputs with balanced inputs. The benefitsmentioned

above will apply only when both inputs and outputs are of the balanced type. If all else fails, you can still

connectthe TRUTH to theheadphonesoutput of yourconsole.

+Be sure to mute the signal sources before you put the B2031 into operation.

Once the TRUTH has been connected as described above, you can activate the speaker with switch 5.

2.2 Level setting

WhentheTRUTHhas been connected properly andswitched on,you can nowturn upthe consoleoutput that

feeds the B2031. Provided you have a signal source connected, you now hear the audio material as it is

playedback by the TRUTH.The INPUTTRIMcontrol onthe rear panelis setto0dB ex-factory, i.e.unity

gain,which is okay whenyou feedtheTRUTHfrom a pro-level console.Inthiscase, the B2031 automatically

operatesat maximum level, providedthatyour console has beensetup correctly and itsoutputis set to 0dB.

The LIMIT LED 2helpsyou controlthe level. Itlights up assoon as overloadingcauses one oftheinternal

protectionstorespond.TheTRUTHdoesn'tgetdamagedwhentheLIMITLEDlightsupwith occasional signal

peaks. However, please make sure that it won't light up all the time, because sooner or later this will activate

thethermalprotection system and temporarily mutethebuilt-inamplifiers,to warn you thatyou aredriving the

B2031 too hard. If so, you can reduce levels either on your console or using the INPUT TRIM control .

If the outputs on your console don't provide studio-level signals, you can turn up the INPUT TRIM control. If

you connect the TRUTH to the preamp output of your stereo system, it may also be necessary to raise the

level on the TRUTH itself. To build up a rudimentary stereo system, you can directly connect the outputs of a

CD player (if they can be controlled in volume) to the B2031's inputs, and use the CD player to adjust the

volume.

+The TRUTH is capable of producing high volume levels. You should mix your recordings at

moderate levels, so as to avoid listening fatigue and hearing impairment.

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