Download NHT VT-3 User's Manual
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N o w H e a rT h i s - 5 2 7 S t o n eR o a d ,B e n i c i aC , A 94510 TechnicalSupport 800-NHT-9993 Parts & Warranty 800-225-9847 CAUTION CAUTION:TO REDUCE RISK OF ELECTRICALSHOCK, DO NOT RE 4OVE COVER (OR BACK). NO USERSERVICEABLE PARTSINSIDE.REFERTO QUALIFIEDSERVICEPERSONNEL. A /i\ to alerlthe userto thepresen@ol uninsulated symbol,wilhinan equilateratriangleis inlended Thetightning ilashwithth€anowhead 'dangercus a riskof eiectricshocklo persons. lo conslitute withinthe produclsenclosure thatmaybe of suficientmagnitude voltage" pointwilhin of mpodantoperalifgandmanlenance to alefttheuserlo lhe presence an equihteE triangl€is intended Theexclamation (seruicing) the appliance. instructions in the litsraluEaccompanying TO RAINoR MoISTURE SHocK,DONOTEXPoSETHlsAPPLIANCE THERlsKoF FIREORELECTRIo WARNING: TO REDUCE - All safetyandoperatnginstructions is operated shouldbe rcadbeforetheappliance 1.READINSTRUCTIoNS ' safetyandopsrating shouldbe rclained forfulurcrcference. inslructions 2. RETAIN INSTRUCTIONS -Allwamings to inslructions shouldbe adhercd on theappliance andin operating 3. HEEDWARNINGS -All opelating anduseinstructions shouldbefollowed INSTRUCTIONS 4. FOLLOW kitchen sink,laundry tub;in a wel base' washbowl, Theappliance shouldnolbe usednoarwaler' neafbathtub, 5. WATER ANDt\4otsTUREmenl n€ara swimming Pool,etc, - Do noiplacethisproducion an lnstablecart,stand,tripod,blackel,or tabie.Theappliance shouldbe usedonly ANDSTANDS 6. CARTS byth€manufacturot witha cadof stsndthatis r€commended - Th€applianoe do nol int€ferewiihprcperventilalion.Th6 appllance andposilion shouldbe siluatedso thatits locatlon 7. VENTILATION thslmayobstruct cabln€lopsnings on s bed,sofa,rug,or anyeurfac€ shouldno!b6slluated (including amplih€alregisters, stov6s, orotherdevices suchas ladiatols, €houldb€situat€d awayfrcmheatsourc€s 8. HEAT-Theappttance tlerc)thalprcducshoat. - Thisproduct onthemarking label.lf youar€notsura onlyfromth6typeof powersourcoIndlcaled SOURCES shouldb€operst€d 9. POWER power Inlended to op€rale lrombattery yolr product company. Forproducls d€al€ror localpower of thetypepow€rsupplyin yourhome,consull €fer to lheoperatlng Inslructlonr or othersources, - Powersupplycordsshouldb€ rout€dso thatth6yare notlikelyto b€ walk6duponor pinch€dby il€mLr] 10.POWER CORDPROTECTION ptac€duponor egalnst receptecles, andthepointwh€rsthsysxilfrcmlheappliance.V to cordsandplugs,conveni€nce them,payingsttention pola pllg (a plug having onebladewidff thanth€oth€o.Thisplugwillft ls with a z€d lin€ POLARIZEO PLUG Thls appllance equippsd 11. " lheplug.ltlhe lfyou ar€unableto ins€nth€plugfullyintotheoutl6l,try r€v€rsing Intothepoweroutl€tonlyon6way.Thlsb a saf€tyf€ature. plugstllltalleto lit, contact your€lectrlclan outl6t.Donotatt6mpt lo det€stthissal6lyf6alur€. to feplac€yorirobsolet€ - Foradd€dproteciion 8ndunussdforlongp€tiods oftlm6, storm,orwh€nit is l6ftunatlend€d torthisproduct duflnga llghtning 12.LIcHTNING andpowor Thlswillpr€vsnidamag€to ths prcdlcidueto lightning theantenna or cablesystem. unptug it frcmth6walloutl€tanddisconn€ct - Do notovedoad r€ceptacles, as thiscanresultin a rlskof tir€of walloullets, €xtonsion co.ds,or integfalconv€nlenc€ 13.OVERLOADING Usea dampclothfor Donotuseliquidcleanels or aercsolcl€ansrs. beforccleaning. 14.CLEANING " Unplugthisproduclfrcmthewalloutlet - Thisamplili€r is lefiunused for a longpedodot llme. PERIODS shouldbe unplugg€d fromtheoulletwhentheappliance 15.NON,USE as lheymaytouchdangsrous voltage lhroughopenings, 16.OBJECTAND LIOUID ENTRY- Neverpushobjectsof anykindinlothisproduct poinrsor short-out pansthaicouldresultin a fireoreleclricshock.Nevsrspillliquidofanykindon lhisproducl. - Theappliance personnel shouldbe serviced by qualified when: REQUIRING SERVICE 17.DAMAGE 6. Thepowersupplycordor plughasbeendamaged; or or b. Objects havefallenon or liquidhasb€enspiliedinlotheappliance; hasbeenexposed to rsin:or c. Theappliance or exhibits a marked changein periomancei or d. Theappliance doesnolappearloopeEtenormally is damaged. e. Theappliance hasbeendrcppedorlhe enclosure producl youlself, coversmayexposeyou to dangerous voltagsor olher 18.SERVICINGDonotaiismplio seruicethis as opening orremovinq pgrsonnol. calllheNHTHotline number:1-800-NHT-9993. hazards. Referallservicing lo qualitied seryice Forservice waffantyinformation parlsspecfiedby padsarc rcquircd, PARTS Whenrcplacemenl be suretheservicetechnician hasusedreplacement 19.REPLACEMENT mayrcsultin frre,olectcshock,orolher themanutacturcr orlhai havethesamecha€cteristics as theo ginalpad.Unaulhozedsubslitution lo pedomsaletychecksio deier20.SAFEryCHECK- Uponcompletion olany seruice of repaiEto ihisproduct, asklheservieiechnician minelhallhepmductis in pfoperopeElingcondition. TO PREVENTELECTRICSHOCK,DO NOT USETHIS{POLARIZED) PLUGWITHAN EXTENSION CORD,RECEP TACLEOR OTHEROUTLETUNLESSTHE BLADESCANBE FULLYINSERTED TO PREVENTBLADEEXPOSURE. ! \l VT-3HomeTheaterReference System.Pleasetakea few minutesto read Thankyoufor youfpurchaseof the NHTNrodel provided will helpyouto obtainmaxithroughthis Owner'sl/anual priorto installingyour newspeakers.The information you questions pedormance your at any time du ng the installation or from audio system. li have or need assistance mum CustomerHotlineat: operationof yournewspeaker,pleasecallyourNHTDealeror our Toll-Free 1-ao0-225-9847 io protectihe speakerin the eventthat you moveor transpoftit. Pleaseretainthe lvlodelVT-3'spackaging v ModelVT-3Specifications Loudspeaker: VT-3 Towers . SystemType:4-way& 2-wayacousticsuspension . DriverComplementlTwo10"sideloadedsubwoofers, One5.25"uppefmidrange, Two6.25"lowermidranges, midrange, 1"liquid{ooled aluminum domet/veeter, 5.25"rear-firing 1" rear-firingsofrdometlveeter;All Videoshielded . Crossover:Active100H212dBloctave, passive250H212dBloclave & 2.1kHzlSdBloctave . FrcquencyResponsei21Hz- 26kHz.+l- 3db . Sensitivity:87db(2.83Vat 1M) . l m p e d a n c e :o6h m s . RecommendedAmplitier Power:30W- 300w . Inpul Connections:Twopairsof goldplateds-waybindingposts;8-pinmini-D.l.N. input .Weight:130lbs.each . Dimensions:48"Hx 8"Wx 22.25"D .Flnlsh:ltaliansatinblacklaminate Electronics: VT-3Controller . Inputs:Gold-plated - L, R, LFEfromsufioundpreamplifier RCAconnectors ' Oulputs: cold-platedRCAS- L&Rto mainamp;LFEto optionalsubwoofer; &pin mini-D.l.N oriFutto W-3 towers . FrequencyResponse:100H2- lookHz+^ 3dB ' Tolal HarmonicDistortionr0.005% 'Signalto NoiseRatio:103d8 . Input SensitivityiVadable . Input lmpedance:10Kohms 'Voltage Gain at Full volume: 24dB -Weight:5lbs. . Dimensions: 2"Hx 16"Wx 8"D . Finish:Matteblack Electronics: VT.3 Subwoofer Amplifiers . Inputs:8-pinminiD.l.N. input . Power:500Wmonoaural . FrequencyResponse:20 - 100H2+l 3dB . Total HarmonicDistortionat Full RatedPower:0.3% . Signalto NoiseRatio:95dB . VoltageGain:26dB Specinetonsae subjeclio changewiihoLtrolice,in accodancewithour policyot continuously upgEdingthe pedormance ol ouf p.oducts. I Design NHT productsare designedto deliverrefined,musicalsoundfrom attractiveand affordablepackages.Our efJortsare guidedby the studyof humanhearingand are optimizedfor real worlduse. EveryNHT productundergoesrigorous testingand qualitycontrolat the factoryto ensureyou yearsof listeningpleasure. v- _The. .NHT . .vT-3 _ .Home . _ ^Theater . . Referencesystemis designedto optimizeone loudspeakefsystemfor the divergent Audio(for2 of audioand hometheater Twodiffercntmodesof operationare selectable: imagingand bassrequirements hometheater).The VI-3 musicreprcduction) and Video(for multi-channel channelstereoand discrcetmulti-channel fronlpanelselectionofAudiomodeor Videomode featuresan outboardController(withrcmote)that allowsconvenient (two of volume,fiiteringand equalization for the subwoofers.lt employsfouf highoutput10"subwoofers and adjustment per side)similarto thoseusedin our Suboneand SubTwoSubwoofers.Theyare mountedverticallyin a solidlybuilt, sealedrectangula.enclosure. The two (one pef side) built-in500-wattamplifiersuse patentedBob Carver/Sunfire technology, which allowsthem to delivefvery high outputpowerto the subwoofersin an efficientand cool-running manner. extended TheVT-3was designedto be firstand foremosta musicalspeakerwithflatfrequencyresponse,low distortion, for hometheateruse(Video bassandprecisestereoimaging(Audiomode).TooptimizetheVT-3'sfadiationcharacteristics ambientdriversto createa morespaciousbut less precisesoundstage.Theseambient mode),we employrear-firing, the doesnoteffectthe system'soveralltonalbalance.Operating driversoperateat a reducedlevelso thattheifoperation VT-3in Videomodealso changesthe outputof the subwoofers.They are equalizedto providemoremid-bassoutput (whenoomparedto theAudiomode)to emphasize the lowfrequencyeffectsaddedto moviesoundkacks. @ ftp Amplifier @ Controller Amp (Figure A) 1. PMr SwitchAdi€ies porer torsubsefer ampliferandConholls 3. SLbwfer npd InpLn id &pinD.l.N.dnedor i_omC.nto ler 4. PMr ndietor ThegEn ightis lilwhenlt€ syslemison. 6 Spe€ks npui- Re!. Controller(Figure B) Front of Confoller The amber lighiis lil when t,le sLb$m€r is in slandbymode. The P(rer Indlebr is lil when lhe s)stem s adi!€. 8. Subr@fervoLumeCdlrol Adjci d1eloudll* of the sub{e€6. 10. Vdeo ModeAcli€ LED 13. AmbientDdve6 Adi@ Swiich Remote 14.lnrbienl DivasAcllveLED 15.LFEGainKnob 16.LN PassFibrKnob Backof Conboller 17. Subweler Oubul Righl 18. Sub@ier oLlpLnLefl 19. SubwierGain Seledor A!l@s tor addi[onaLgaintor ]w inpLi sigmls. 20. LFE Inpd 21. LFEThT 22. Lneln L nelryel Rc,AinpdonneclDts 23. LnelLbd UelerelRcAoulpul jacks lo €ciwr/ ma n ampliner 24. Ext TdggerinpLn ffibl6 vid@ modeun€n +5V is p@nt Remote (Figure c) 26. Ambientdn!€rsswibh 27. Vrd6 Bas ConicurLp/d@n 28 LorBass EO uddown I SpikeKitinstallation A SpikeKitis includedwiththe [,'lodeJ VT-3to provideoptimumstabilityand to fifmlycouplethe speakefsto the flooffor improvedbassperflrmance(asifthe'130+lbs ofwood,speakersande,ectronics wasn'tenoughl).EachVT-3loudspeaker is shipped with its own SpikeKit. Cautioni the VT,3 is unstabte without the SpikeKit (or at teast the stabilizerbars) installed. ! Tobeginassembly, unpackihe SpikeKitand inspectall tfle parts.TheSpikeKitincludes:(2) aluminumstabilizerba|s,(4) aluminlmcones,(4) stainlesssteelallenstuds,(1) allenheadwrench,(8) Phillipsheadmachinescrewsand (4) rubbei teet. lmportanti We recommend installing only the stabilizer bars until final placementof the speakeF is delermined.This makesthe speakersmuch easierto move, Carefullytum the speakersupsidedown,andattachthe stabilizerbarswilh the Phillipsheadmachinescrews,usinga#3 Phillipsscrewdriver (seefig 1). Whenjnstallingthe bars ontothe bottomofthe speaker,useyourfingersto startallthe machinescrewsin theirholesbeforetightening themdown. Thiswill preventcross-threading. Onceyou havefoundthe ideallocationfor yourspeakers,you are rcadyto installthe metalcones. Havesomeonehelp you:Whileone persontiltsand holdsthe speakerto one side,carefullyinstallthe conesflushagainstthe stabilizerbars, usingthe suppliedallenstuds. Thespeakersare awkwardto moveafterthe conesare nstalled.Caution:Theconesarc verysharp. To avoidinjury useextfemecarewhenhandlingand installing them. I Placement TheVT-3 is a floorstanding towefspeakerthatrequiresno standsor mountinghardwareotherthanthe includedSpikeKit. TheVT-3is designedfor indooruseonly.As the VT-3is a magnelically placement shieldedloudspeaker, nextto a televisionwill nol distortor discolorthe picturc. To realizethe maximumperformance of the VT-3,you shouldinvestsometimefor fine-tuning adjustments.Followsteps #1-6,referringthe diagramin fig.2. Priorto beginningthis process,we suggestyou selecttwo or threeof yourfavorite recordingsto use while you optimizethe speaker placement. Each time you move the speakersto a new position,take note of the changesyo(Jare hearing. This will help you to find the uttimateptacementfor your VT-3s.Be sureto havea tapemeasureand levelhandy. ._-.. D Y 1.5xD '1.Movelhe speakerswiihin 10"-'12" ofthe frontwall. Unlikemanyspeakers,the VT-3sare designedto be placedcloseto the fiont wall. This placementallowsoptimum loadingofthe lowfrequency drivers.lt alsoloadsthe ambientorreaFfiringddversfor optimirmeffect. 1O',-12" ipacing will produceexcellentresultsin mostsituations, but you can placethe vr-3s as closeas 6" or as far as 24" fromth; yourroom'sacousticsionature. wallto accommodate 2. Determine roughplacement by listenjngposition. Forthe smoothestresponse, the distancetromthe sidewallsshouldbe differenttbanthe distancef.om the frontwall. The.speakers shouldbe arrangedas sj'mmetrically as possible:Equidistant from the sidewalls,perpendicular to the lront wall and parallelto each other. The front-firingdriversshouldface the listeningarea with6utobstruction from 5 Arrangethe speakersso that the distancebetweenthe listenerand the centerof the speakerplaneis '1.5 fuaniture. putsthe listenerin the centerof the stereoimage. Begin timesthe distancebetweenthe speakers.Thisconfiguration yourlisteningby sittingcenteredbehveenthe speakers.Whilelisteningto the firstseleciion,closeyoureyesand listen for imagefocusand depthof soundbetweenthe speakerc-Balancethis imagefocusand deplhwith apparentstage width,listeningfor sound beyondlhe boundariesof the left and right speakers. Play all three recordingsbefore completing thisstep. \v Image Focus: Thelocalizabilityof a pafticularmusicalevent in the soundfield (e.g., the bassis to the left, the saxophone is to the ight, and the piano is centeredbetweenthem). Depth of sound: The sensationthat one musicalevent occurcbehindanother. Themusic shouldnl seemconfinedto a flat plane betweenthe speakers(e.9., the piano is centercdbehindthe bassand saxophone). fine placementby movingthe speakersinwardor outwardfromeachother 3. Determine N,,love the VT-3sno morethan l" eithertowardor awayfrom each other Initially,makesurethat the speakersare pa€llelto eachother.Playthe samethreerecordings again,listeningfor imagefocus,stagewidthanddepth.Evaluate is imprcved,markthe positionwith a pieceof masking whetherthereis an impfovement.lf the overallperformance width. the bestbalanceof imaging,depthand soundstage tape,and continuethisprocessunlilyou havedetermined the toe-inafleryou are satisfied to obtainthe bestimagefocus. Determine A smalldegreeof toe-inmay be necessary withthe depthand widthof the soundstage.No morethan 10 degreesshouldbe required(i.e.,the outsidecornerof the speakeris about1"fartherfromthe frontwallthanthe insidecorner). 4. lnstallthe metalcones. Nowthatyou havethe speakefsin the besfsoundingposition,installthe metalconeson to lhe stabilizerbars(referto makingsure that the SpikeKitinstallationabove). Once all four conesare installed,recheckyour measurements, speakersare stillexactlywhereyou wantthem. 5, Adjustspoakertilt. (useyourlevelto be to ensuretheVT-3is levelanddoesnotrockin anydirection Tost€rt,adjusttheconesas needed position.At one yourear levelin the listening withthe verticalaxisby raisingand lowerlng sure). Experiment particular youmaynoticemoreambience occufs verticalposition, anddepthjn the sound6tage.lf theimprovem€nt byslowlyunsctewing thetwometalcones whenyourears areat a lowerposilion, raisetheheightattherearofspeakers if the improved soundoccurswhenyour6arsars at a higherposition, raige on the r€arstabilizer bar, Likewise, byslowlyunscrewing ihetwomelalconesonthoftontstabilizer bar, Besurenot theh€ightat thoffontofthespeaker to unscrew toomuch,or theconesmaycomeoff. ."' 6. Finalpointsto rem€mber to livewiththeW-3sfora while. Youmaywantto r€peatthosotupproc€dures at som€pointafteryouhavea chance duringthe initialset-up. Youwill find that subtleimprov€ments can be madethat you may have overlooked in yourlistening envhonmont. Bo patient, havefun,and Experimentation is thekeyto findlngthe bestarrangements position in speaker cansometimes havea significant efrocton thesound.ln addition, remember thatsmallchanges playan important roomfurnishings rolein absorbing andreflecting soundwaves. Midrange andhighfrequencies in particular will be absorbed by softfurnishings suchas sofas,carpetsandcurtains.A largenumberof thesesofl furnishings willdr.illthesound,whilea "live"roomwithfewfurnishings willbrighten thesound. I Connections Before connecting speakers to your system, it is very imporbnt that you tun otr the power to your amplifier / receiver to avoid damage to lhe equipment To minjmizenoisepickup,segregatecablesby function.Do not run low levelsignalcablesparallello powercables,or to!_digitalcables. Also do not run speakercablesparallelto powercordsor digitalcables. lf differenitypesof cablesare placedneareachotherat someplacein yoursystem,separatethemby the maximumpracticaldistanceand crossthem at rightangleswheretheymeet. Do nottie AC powercordsand speakercablestogether. I General Connections and Controller are connected via hvo2o-foolong 8-pinD.l.Ncables.Onlythe subwoofer TheVT-3subwooferamplifiers amplifiers are pluggeddirectlyintolhe AC outletin thewall. TheVT-3Controllerreceivespowervia the 8-pinD-l.Ncable. lf the distancebetweenthe subwooferamplifiersand the Controlleris greaterlhan twentyfeet,NHToffersan extension cable(ModelX20,whichis 20 feet longand coupleswiththe originalcable). amplifierplalethereare two pairsof bindingposts(fig.A) with metalshortingstraps On the backof the VT-3'ssubwoofer pairs. connecting top and bottom Thereare lwo differentwaysto connectthe VT-3sto yoursystem:Witha singleampli are alreadybiamplified fier,or withtwo amplifiers andtwosetsof speakercable. Keepin mindthai the VT-3s'subwoofers via theirown 500WDoweramDiifiers. SingleAmplifierMethod To run the VT-3swith one externalampliner/ rcceiver,simplyconnectlhe speakercablesto e therthe top set or bottom set of bindingposts(it doesn'tmatterwhich). Leavethe shortingstrapsin place. TwoAmDlitierMethod onelo powerihe rear"ambient" driversandone Completeisolationcanbe achievedby the useof two separateamplifiers, methodprovidesincreaseddynamicrangeand powef to powerthe midrange/ highfrequencydrivers.The two-amplifler all theirheadroomtowarda specificgroupof drivers,sparingthernthe output,as it allowsbothamp|fiersto concentrate taskof ddvingall the speakers. A mainampliflerfor the upperrangedrivers(toppairof bindingposts),and a secondampiYouwill needtwo amplifiers: fierfor the rear"ambient"drivers.Removethe shorting straps, \g Connectlngthe subwooferamplitiers Connectthe fightVT-3towersubwooferamplifierto the "R Speaker"outputfromthe Conhollerwith the provided8-pin amplifierto lhe "L Speaker"outputffomthe Controllerwith the other D.l.N.cable.Connectthe eft VT-3towersubwoofer 8"pinD.l.N.cable. Be carefulnotto mis-insert the D.l.N.cable,as the pinsare smal andcan bendeasiy. I\,4ake surethe cableconnectoris fullvinsertedinlothe socket. Note: Both D.l.N. cables must be attached to the Controllet in order for it to function prcpe y. Irls ls becausethe left speaketpowers the analogaudio functionsand the ight speakerpowers the digitaland rcmate controlfunctions. By keepingthe powet suppliesseparate,the potentialdigitalnoise generatedwill be kept out of the criticalanalogpath. I Audio Connections TheVT-3Contrcllerwas designedfor a separateprocessor andamplifiers or for a receiverfeatufingpre-ampoutand main ln RCAjacks.No speakerlevelconnections arc availablewiththe VT-3Controller. Connecithe pre-ampor majnouis fromyourprocessor or feceiverto the LineInputon the backof the VT-3controller lf you are not runninga separatesubwoofer, likea SubTwo,you can also connectthe LFE outpuito the Low Frequency EffectsIn jack. The LineOuiputsfromthe backof the Controller connectto the maininputson yourreceiveror ampljfier. Be carcfulto maintainthe pfoperleftand rightpolarity. I Power Connections 1. Connectthe powercordto the rightsubwooferamplifierand an AC walLoutet. 2. Connectthe powercordto the leftsLrbwoofer amplifierand an AC walloutlet. 3. Swiichlhe powerto "Auto"on the rightspeaker. 4. Swtchthe powerto "Auto"on the leftsoeaker. I Explanation of Features (seefigureB) TheSUBWOOFER VOLUMEcontrolallowsyouto adjustthe volumeofthe subwoofers rclativeto the restof the system. [,4anylistenersmakethe mistakeof settingthe subwooferleveltoo high,whichcan causeexcessbloatand lossof detail andmusicali9.A pfoperlyset-upsubwoofer blendsin withtheothefspeakersanddoesnofcallattention to itself.Observe for volumesettingl . rhefollowingguidelines YTurn downt-hdvolume Tumon youraudiosystem.Play controlonthe Coniroller to its lowestposition(counteFclockwise). volumeto a comfortable listeninglevel. Slowly some musicyou are familiarwith and set your receiver/ preamplifier listeningfor the properlevelbalance.Whenthe outputof the subwoofers is increasethe volumeon the VT-3Controller, balancedwiththe restofthe system,you will hearimprovedbassextension,but you shouldbe unawarethat it is coming fromthe subwoofersl will controlthe overallvolumeof your system, Fromthis pointon, the volumecontrolon your receiver/ preamplifier includingthe subwoofersThefrontpanelMUSIC/ VIDEOMODEswitchand VIDEOBASS CONTOURallowyou to optimizethe VT-3sfor music listeningor movieviewing,givingyouthe bestof bothworlds-Whenwatchinga movie,lhereis oflena disparitybetween to you. Youreyestellyouthateventsare occurdng the sizeof the sonicspaceandthe sizeofthe visualspacepresented in a largespace,for example,whileyourearstell you that eventsare occurringin a spaceroughlythe sizeof yourroom. allowinga closermatchbetweensonicandvisualspaces.The Activatingthe rear-firing driversenhancesthe soundstage, is not desired.Similarly, whenlisteningto music,manylistenrear-firing driverscan be switchedoff if the enhancement any individualfrequencies. Flatbassresponsemorerealislically ers prefera flat bassresponsethal doesnot emphasize the soundof liveinstruments.However, whenwatchingmoviesin a hometheatersystem,manylistenersprereproduces withmoreoutputin the fer a punchier, soundslikeexplosions andgunfire.Subwoofers "boomie/'soundthatemphasizes lvlodeswitchallowsyou to mid-bassregiontendto deliverthis punch,at the expenseof flat response.The l\4usic^y'ideo add mid'basspunchif you so desire. the operatingmodeof the VT-3. In the l\4USlCmode,the VT-3'sresponse TheMUSIC/ VIDEOMOOEswitchdotermines reproductaon. In the VIDEOmode,the re6ponse ischangedfor moviesoundtrack is flatforaccuratemusicalreproduction. ThebluelightdenotesVIDEOmode.Whilein VIDEOmode,the ambientdriversare selectable.TheAMBIENTDRIVERS ACTIVEswitchselectsbetweenthe activeand inactivestatefor the ambientdrivers.Theambienldriversare activewhen the bluelightis on. TheAMBIENTDRIVERS ACTIVEswitchfunctionsonlywhenthe MUSIC/ VIDEOMODEswitchis in the VIDEOmode.The controlof thisfeatur€is presenton boththe controllerand lR remote. variablefrom0 to +7.5dB, centeredat 60H2. The BASSCONTOURprovdesbassboost,whichis continuously ITVIDEO - equahzation has a fairlylow O, coveringthe rangebetween40Hzand the hightrequencycutoffof the subwooters.The fesponserollsoff below35Hzto providegrealerpowerhandlingat elevatedlisteninglevels.VIDEOBASSCONIOURis activeonlywhenthe VT-3sare in VIDEOmode. The controlof thisfeatureis pr€senton boththe Controllerand the lR remote, No'€: Q refercto the range of frcquenciesover which the equalizationhas an etfect (low Q neans a broad nnge of trequencies,high Q meansa rclativelynanow mnge of frcquencies). The LOW BASS EQ providesgain,continuously adjustable from-7 to +7 dB, centeredat 30H2. lt has a fairlyhighO, whichwill leavethe low-frequency crossoverpointof the subwoofers undisturbed. This is usefulin conhollingthe lowest bassfrequencies wjthouteffectingthe mid-or upperbass. Roomswithconcretewallsandfloorstendto supportoutputin the bottomoctave,and may requirea slightdecreaseof the LOWBASSEQ level. Roomsof lighter(wood)construction tendto providerelativelylesssupportfor the bottomoctaveand mayneedan increasein LOWBASSEQ level. Theconkol of thisfeatureis presenton boththe controllerand lR femote,and it is activein boththe MUSICand VIDEOmodes. The continuously variableLOW PASSX-OVERADJUSTMENT detefminesthe rangeof frequencies that the subwoofers willreproduce.The LowPassFilteris variablebetween40Hz(lowbass)and 180H2(upperbass),to accommodate a variety of roomconditions.Adjustmeot shouldbeginwiththe indicatorpointingin the "straightup"position.Afteradjusting the basslevel,experiment withsmallchangesclockwise to warmor thickenthe lowermidrange/upper ba6s,or counter-clockwiseto lightenor thin the lowermidrange/upper bass. Listeningto malevocalswill aid in findinga goodsettingfor this contol_ The LFE GAINcontrolallowsfor levelmatchingbetweenthe mainleftand rightinputsand the LFE input.Youmayfeed the LFEoutputfromyoursignalprocessor to the VT3controllefvia the LowFrequency EffectsInjack (andto a subwoofer or otherdevicesvia the LowFrequencyEffectsThrujack).The LFEgaincontrolallowsyou to setthe levelofthe lowfrequencyeffectschannelsentto the VT-3srelativeto the totalspeakeroutput. \rlhe GAINSWITCHallowsyou to increasethe line-levelinputsensitivityofthe Controllerby 10d8. This is usefulifyour receiveror preamplifier has a low line-leveloutputvoltagethat limitsyour rangeof volumeadjustability on the VT-3 controller. TheVT-3hasa STANDBYMODEfeaturethat is automaticand rcquiresno usefadjustments.Whenno signalis prcsent goesintoStandbyl\/ode,and it will usea minimumof powerto remain"asleep".When for 45 minutes,theVT-3controller turnson as soonas a signalis received.Thereis no needto turnihe VT-3son the systemis usedagain,it immediately and off everytimetheyare used. The VIDEOMODETRIGGERINPUTis an auxiljarytriggerinputthat fo.cesthe VT-3 into the VIDEOmode. N,4anJlr preamplifiers and processors havea triggeroutput(+4.sVDCto +25VDC)whichis enabledwhenthe userselectsa videowillswitchintoVIDEOmodeif the previousmode function,suchas DVDof DSS. lf thetriggeris aclive,theVT-3processor was l\rUSlCor stayin VIDEOif it wasalreadyin that mode-Thesystemwill remainin the VIDEOmodeuntilit is switched backto MUSICmodeeitherby the lR remoleor by the Conkoller I Operation TheVT-3systemwas designedto handlea widerangeof listeningleveis,but everycomponenthaslimits. lt is important distortionor harshbreakup to use commonsenseand listenfor signsof possjbledistressfromthe speakers.Noticeable is an indicationthat the speakeris runningbeyondits capacity,and the volumeshouldbe decreased.lf you feel heat Speakerdamagemostoftenoccursfrom fromthe frontof any of the speakers,reducethe levelimmediately. emanating sustainedhighvolumelevels,not frcm transientsoundsor briefmusicalpeaks. Excessiveboostingof bass,treble,of equalizercontrolscanworcenthe problemand is not recommended- I Maintenance undernofmaluse. YourVT-3shavebeendesignedfor yearsol trouble{reeoperationand requireminimalmaintenance glasscleaner.Tocleanthe gril, firstremove TheVT-3cabinetmaybe cleanedusinga dampclothor a mild,non-abrasive it fromthe speaker,thenbrushlightlywitha softbrushor usea vacuumon its lowestsetting.TheVT-3controllermaybe of cleanedby wipingwith a lint-freecloth. Do not exposethe toweror Conkollerto directsunlight,hightemperatures moisture.In the eventthat serviceis required,do not openthe VT-3amplifleror Controller.Referthe unitto a qualllied servicetechnician. I Troubleshooting lf tho VT-3failsto operatewhenbothPowerSwitchesare turnedon, checkthe powercordsand all the inputand output are properlymade. connections thoroughly.lf the siatuslighton the controlleri6 noton, vorifythatthe all the connections your present, for assistance. contaci localAuthorized NHTDealeror NHTlmmediately lf no lightis U ! LimitedWarranty ValidOnlyin the U.S.A. (thewarfantyperiod)froman authorzed NNTdoalerNow Forthe ;eaodor 5 vearsIor oansand5 vearsfor laboriromdatsof or q na purchaso -ri"iifl ,r.l|-ri,".,"rsriariroro'ioucr,a'sroru1crolorcpe{Lnde,rrnar,eoJerorm"rrradrrgde'ecrwl'ellstaLeda.d ops,areO"i"ortingrolh"o*oer'smanuatinsrrucronsencrosed;,rirheun(,rwlrbereparredor,epacedwithauniofcomparablevalu wo . Partsslpp ed underthiswaranlymaybe newor rebuiiatlhe optlonoi Nl-lT optonof NHTwilh;ri chargelo youfor parlsor aclualrepair al applcalon' commerc Thiswamntydoesnotcoverany prodlctwhch is usedin anytradeor businessor n an jndusirialor lrom ateralons modfications tem or anydarnag€calsedio lhe produciresulling Ths wananlydoesnotcoverrhecabinetor anyappearance lo powern excessof misirseor abuse,damaqedle Io ighhns or powersuraes,or beingsobtected nol authoz;d if wlring by NHT,accidenr, thespeakefspoblshedpowerralng. lromany source witholtchargeunderlhs waranty obtained Thiswarrantydo6snot coverlhe cosi of partswhichwolld othedse be provided parlsor labot NHTseNicetocaton.Ths warantydoesnoi coverdefectsor damagecalsedby lhe lse oi unaulhorzed olherthana; authorized mainlenance. or lromimproper Altered.defac€dor removedserlalnumbefsvoid this warranty damages NHT or consequential prce of the product, and NHTw ll not be I ablelor ncidental Thetiabiiity of NiTwitbe miledto lhe purchase the wamrty perlod. Somestatesdo nol alow understatelawsto a periodnol exceeding underany impledwarranties timis its o-btigations on-howongan npliedwarantytasls.andsomestaiesdo nol alow theexcusionor lmitallonof ncidertalorconsequentialdamages timtations legalrights,andyoumayhaveothe.r ghlswhichvary ;r excusionsmaynotappy ro you. Th s warranlygivesyou specific Theabovetmilalions a numberoiaulhorized s€toice@mpanesthrolghoutthe USAshoudyou.producteverrequnesefr@. To receivewarcnty NHThasappoint€d yoriwil needio presenlyolr salesreceipishowingplaceanddaieoforlgjnaownefsiransaclon seryice, @l orwrile: NilT seruicelocallon, Tonndthe nameandaddressofthe neareslaulhorized MA 01747. 1-a00'225'9a47. AB TechSeruices,'l7c Airport Drlve,HoPedale, irro@abechseryices.@r Keepthis warrantywith your salesreceipt, Recorddats and placeof purchasaforfuture reference. AD 29990 2/2000