FBT QUBE PA User Manual

shapingthesoundoftomorrow

PA140

CH.2

SIG

PROT

CLIP

PWR PWRSIG SIG

G G

R R

PROT PROTCLIP CLIP

PWR

SIG

PROT

CLIP

0 100 10

CH2

100 10

POWER

POWER

Worldwidedistributor FBT
www.qubeaudio.com

FBT elettronica S.p.A. --62019RECANATI(MC)-ITALYZonaInd.leSQUARTABUE

TEL.[phone]r.a.-FAX[phone]-P.O.BOX104-Internet:http://www.fbt.it-E-mail:[e-mail]

POWERAMPLIFIER

CH1 CH2

PWR PWRSIG SIG

G G

R R

PROT PROTCLIP CLIP

Operatingmanual

0 100 10

POWER

FBTElettronicaS.p.A.

www.fbt.it

CAUTIONS

RISKOFELECTRICSHOCK

DONOTOPEN

TOREDUCETHERISKOFELECTRICSHOCKDONOTREMOVE

COVER.NOUSERSERVICEABLEPARTSINSIDE

REFERSERVICINGTOQUALIFIEDSERVICEPERSONNEL

TOAVOIDELECTRICSHOCKDONOT

INSERTFINGERSOROBJECTSINTO

ANYOPENINGSINTHECABINET

TOPREVENTFIREORELECTRICSHOCKDONOTEXPOSE

THISEQUIPMENTTORAINORMOISTURE

RISKOFELECTRICSHOCK:

OPENONLYIFQUALIFIEDAS

SERVICEPERSONNEL

!

TOREITERATETHEABOVEWARNINGS:SEVICINGINSTRUCTIONS

AREFORUSEBYQUALIFIEDPERSONNELONLY.TOAVOID

ELECTRICSHOCKDONOTPERFORMANYSERVICINGOTHER

THANTHATCONTAINEDINTHEOPERATIONINSTRUCTIONS

UNLESSYOUAREQUALIFIEDTODOSO.REFERALL

SERVICINGTOQUALIFIEDPERSONNEL

INTRODUCTION

Congratulationsonyourpurchaseofadualchannelprofessionalpoweramplifiers.YourQUBE
amplifierhasbeendesignedtoprovideyearsoftrouble-free,highperformanceoperation.Wehopeyouenjoyit.
Youramplifiermayincludetheplug-inloudspeakercontrollermodulesinplaceofthestandarddualchannelinputmodule.
The“controllermodulesarededicatedcompanionstoaspecificQUBEloudspeakers.Theyprovideprotectioncircuitry,

SP”

SP

electroniccrossovercircuitryandresponseoptimizationfortheirassociatedloudspeakers.

Caution:ifyouramplifierincludesa“SP”,itisconfiguredforusewithaparticularloudspeakermodelandshouldnot
beusedwithanyothermodel.Useofthewrongloudspeakermayresultinloudspeakerdamage.

YourQUBEamplifierwascompletelytestedandinspectedbeforeleavingourfactoryandshouldhavearrivedinperfect
condition.Pleasecarefullyinspectyouramplifieranditsshippingcartonforanynoticeabledamage,andifanydamageis
found,immediatelynotufytheshippingcompany,
Onlytheconsigneemayinstituteaclaimwiththecarrierforanydamageincurredduringshipping.Besuretosavethecarton
andallpackingmaterialsforthecarrier’sinspection.
Itisalsoagoodideatosavethecartonandpackingmaterialeventhoughtheamplifierarrivedingoodcondition.Ifshipping
theamplifiershouldeverberequired,itshouldbeshippedonlyinitsoriginalfactorypacking.

Important:

YourQUBEamplifiercontainsnouser-serviceablepartsandallserviceshouldbereferredtoqualifiedservicepersonnel.We
recommendthatitbereturnedtothefactoryinitsoriginalpackingcartoniffactoryserviceisrequired.

QUBEPA140/PA300/PA360

POWERAMPLIFIERS

ThePA140provides500Wofpowerperchannelusinga4
ohmspeakersystem(350Wperchannelwith8ohm)andis
theidealamplifierforQUBEQ112,Q115,QS112and
QS115speakers.ThePA140canalsobeconnectedtoa
controllermodule.

PA300isa1500Wperchannelpoweramplifierdesigned
forallthoseapplicationswherereliabilityandsoundquality
areextremelyimportant.Itincludesself-resetting
protectivecircuitrytopreventanydamage,withLEDs
indicatingthestatusofeachchannel.Othercharacteristics
includeagroundliftandselectorofbridgemode.PA300is
idealtobeusedcombinedwithQ115,QS115,QS118,BRH
andTRSQUBEspeakersystems.Theversatilityofthe
poweramplifierallowstheuseofcontrollermoduleto
processthesignal,optimisingtheoverallperformanceof
thespeakersandprotectingthematthesametimefrom
possibledamages.

ThePA360isa1800Wperchannelpoweramplifier
designedforallthoseapplicationswherereliabilityand
soundqualityareforprimaryimportance.Itincludesself­resettingprotectivecircuitrytosafe-guardagainstdamage,
withLEDsindicatingthestatusofeachchannel.Other
characteristicsincludeagroundliftswitchandselectorfor
simplesettingofstereobridgemode.ThePA360isidealfor
theusewithQUBEQSA210LINEARRAYspeaker,QS218
,BRKandRUT.Theversatilityofthesystemallowstheuse
ofacontrollermoduletoprocessthesignal,optimisingthe
overallperformanceofthespeakersandprotectingthemat
thesamefrompossibledamages.

ANALOGCONTROLLERS

Seepage8. Seepage8.

DIGITALCONTROLLERS

Seepage8. Seepage10.

TECHNICALSPECIFICATIONS

Continuouspowerbothchannelsdriven

WRMS(@THD<0.05%1kHz)

ContinuouspowerBridgemode

WRMS

Impulsivepowerbothchannelsdriven

WRMS

ImpulsivepowerBridgemode

WRMS

Inputsensitivity

Inputimpedance

Slewrate

Signaltonoiseratio

Harmonicdistortion

(1kHz-4ohm)

350W@8ohm
500W@4ohm

550W@8ohm
900W@4ohm

1300W@2ohm

850W@8ohm

1200W@4ohm
1700W@2ohm

1000W@8ohm 2600W@4ohm 3400W@4ohm

470W@8ohm
700W@4ohm

600W@8ohm
1000W@4ohm

1500W@2ohm

1400W@8ohm 3000W@4ohm

900W@8ohm

1250W@4ohm
1800W@2ohm

2500W@8ohm
3600W@4ohm

1,4Veff 1,4Veff 1,4Veff

15kOhmmin. 15kOhmmin. 15kOhmmin.

>40V/s >30V/s >30V/s

107dBw/A 110dBw/A 110dBw/A

<0,015 <0,01 <0,01

IMD

TIM

Frequencyresponse

Dampingfactor

Maxoutputvoltage

Maxcurrentoutput

Powerconsumption

Powersupply

Protections

Cooling

Dimensions

Weight

Allpowermeasurementsmadeat230V
AllmeasurementsmadeusingAUDIOPRECISIONequipment
ImpulsivepowermeasuredinaccordancewithIHFmethodwith20mSburstsandREPETITIONRATE100mS

@8ohm,1kHz

(WxHxD)inch

lb.

<0,04% <0,04% <0,015%

<-80dB <-80dB <-80dB

20Hz-20kHz 20Hz-20kHz 20Hz-20kHz

>400 >400 >200

90Vp 100Vp 85Vp

25Aeff 63Aeff 84Aeff

1500VA 2800VA 3500VA

230Vac 230Vac 230Vac

DC/Thermal/SOA DC/Thermal/SOA DC/Thermal/SOA

variablespeedfan 2variablespeedfan 2variablespeedfan

19x3.5x19 19x5x19 19x5x19

40.5 66 81.5

FRONTPANELFEATURES

PA140

PA140

CH.2

SIG

PROT

CLIP

1

3

2

PWR

SIG

PROT

CLIP

0 100 10

1

3

POWER

4

2

1.Channelsstatus(PROT/PWR)led

Thechannel1&2statusledglowsgreentoindicatetheamplifierisonandchannelisoperatingnormally.Itglowsredto
indicatethatoneormoreoftheamplifierchannelprotectivecircuitshasbeenactivated.Theamplifiercontainsseparateover­temperature,DConoutputandshorted-loadprotectivecircuitryforeachchannel.Wheneverafaultisdetectedtheoffending
channelistemporarily“shutdown”andthestatuslightturnedredtocallattentiontotheproblem.Thechannelwillremain“off”
untilnormaloperatingconditionsarerestored.

Note:ThestatusledisalsocontrolledbytheSP12andSP22controllersandwhenoneofthesemodulesisincluded,the
statusledwillglowredwhenoneofthesemodules’protectivecircuitshasbeenactivated.

Itisnormalforthestatusledtoglowredwhentheamplifierisfirstturnedon.Itwillthenturntoasteadygreenasasignthat
channelisonandoperatingsatisfactorily.

2.Channelssignal(SIG./CLIP)led

Thesignalledindicatesthestatusoftheamplifier’schannelsignallevel.Whenitisoff(notglowing)itshowsthat nosignalis
beingreceived.Itglowsgreentoindicateanormalsignallevelandredasanindicationthatchannelisbeingdriveninto
clipping.Occasionaloperationofthered“clip”indication(flickeringoftheredlight)isanindicationofoptimumsystem
utilization.Extendedilluminationofthered“clip”indicationisasignthesystemisbeingoverdrivenandshoudbeavoided.

3.Channeloutputattenuator

Thechanneloutputattenuatorcontrolsthegainofchannelinalloperatingmodes.Whenitisturnedfullyclockwise, the
amplifierwillhaveitsmaximumratedvoltagegainandwilldeliveritratedoutputwhendrivenbyitsratedinputsignal.Asa
generalrule,settingtheattenuatorinthefullclockwisepositionprovidesmaximumamplifierheadroom;settingthe
attenuatorsatalowerlevelmaximizesthesystemsignal/noiseratio.

Important:Whentheamplifierisbeingoperatedinthebridgeoutputmode,boththechannel1andchannel2attenuatorsmust
besetinthesamepositiontoavoidamismatchinthesignallevelbeingsenttoeachchannel.

4.Poweron/offswitch

Thisswitchisusedtoturnpowertotheamplifier“on”and“off”