vx2515 vx2510 - samsontech designed transducers ... also allows you to smooth out volume differences...

HA2500 2

HA2500 2

250 WATT 1 X 15” BASS COMBO250 WATT 2 X 10” BASS COMBO

VX2515VX2510

Introduction 2

Features 3

Guided Tour FrontPanel 4-5 RearPanel 6-7

Setting Up and Using the VX2510 & VX2515 8-9

About Equalization 10-11

About Compression 12

Appendix A: Caster Installation 13

Appendix B: Block Diagram 14

Appendix C:Changing the VX2510 & VX2515 Voltage 15

Specifications 16

Copyright2005-2008,SamsonTechnologiesCorp.

PrintedJune,2008v1.1SamsonTechnologiesCorp.45GilpinAvenueHauppauge,NewYork11788-8816Phone:1-800-3-SAMSON(1-800-372-6766)Fax:631-784-2201www.samsontech.com

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CongratulationsonpurchasingtheHartkeVX2510&VX2515BassAmplifier!Althoughthisunitisdesignedforeasyoperation,wesuggestyoufirsttakesometimetogothroughthesepagessoyoucanfullyunderstandhowwe’veimplementedanumberofuniquefeatures.

TheVX2510&VX2515combosfeaturetHHA2500ampliferproviding250wattsofpowertothebuilt-in2-waybassspeakersystem.WiththatkindofpowerandHartke’scustomdesignedtransducers,including2x10-inchlowfrequency,workingwitha1-inchhighfrequencycompressiondriverintheVX2510anda15-inchlowfrequencydriveunitplus1-inchhighfrequencycompressiondriverintheVX2515,thesebasscombosareEXTREMELYloudandpunchy.Inaddition,theVX2510&VX2515offeranumberofadditionaladvancedfeatures,includingfront-panelcompressionandgraphicequalizerLEDindicators,effectssendandreturnjacks,aneffectssend/returnbalanceknob,andadirectoutputwithgroundliftandpreorpostEQselection.

TheVX2510&VX2515areoptimizedforusewithelectricbassinstruments,andthefrontpanelcontrolsinbothmodelsarevirtuallyidentical.You’llfindeithertobeanexcellentbassamplifierforliveperformanceuseinsmallandmedium-sizevenues;inaddition,theVX2510&VX2515’sadvancedpre-ampfeaturesmakesitidealforuseinrecordingenvironments.

Inthesepages,you’llfindadetaileddescriptionofthemanyfeaturesoftheVX2510&VX2515bassamplifier,aswellasaguidedtourthroughtheirfrontandrearpanels,step-by-stepinstructionsforsettingupandusingeachproduct,detaileddiscussionsaboutequalizationandcompression,andfullspecifications.You’llalsofindawarrantycardenclosed—pleasedon’tforgettofillitoutandmailitsothatyoucanreceiveonlinetechnicalsupportandsowecansendyouupdatedinformationabouttheseandotherHartkeandSamsonproductsinthefuture.

SPECIALNOTE:Shouldyouruniteverrequireservicing,aReturnAuthorizationnum-ber(RA)isnecessary.Withoutthisnumber,theunitwillnotbeaccepted.PleasecallSamsonTechnologiesat(516)932-1062foraReturnAuthorizationnumberpriortoshippingyourunit.Pleaseretaintheoriginalpackingmaterialand,ifpossible,returntheunitinitsoriginalcartonandpackingmaterials.

Introduction

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TheHartkeVX2510&VX2515bassamplifieroffersallthenewestconceptsinbassamplification.Herearesomeofitsmainfeatures:

• Powertospare—TheVX2510&VX2515,afull250wattsdeliveredtoitsinternal4ohmspeakersystem.

• Internal,2-waybassspeakersystemincludingtwocustomdesign10-inchlowfrequencydrivers,plus1-inchhighfrequencycompressiondriverintheVX2510andcustomdesign15-inchlowfrequencydrivers,plus1-inchhighfrequencycompressiondriverintheVX2515.

• OuruniqueTransientAttack®circuitrywhichensuresthateverynuanceofyourbassperformanceisreproducedfaithfully.

• TwoPre-Ampinputknobs,allowingcustomblendingoftubeemulationandsolidstatesounds.

• Tenbandsofhigh-qualitygraphicequalization,allowingyoutocreateabroadrangeoftonalcolorsforyourbassinstrument.Adedicatedin/outbuttonallowsyoutopresetanequalizationcurve.

• Twofullyadjustablecontourknobs(highpassandlowpass),whichprovidefur-thercontrolovershapingyourbasssound.

• Abuilt-incompressorwhichnotonlyaddsreal“punch”toyourbasssound,butalsoallowsyoutosmoothoutvolumedifferencesbetweennotes.

• Twoindependentinputsthataccommodatebothpassiveandactivebassgui-tars.

• Protectionrelaycircuitrythatprotectsconnectedspeakersfromdangerousover-loadingandalsoprevents“thumps”whenpoweringonoroff.

• Effectloopsendandreturnjacksthatallowyoutoconnecttoprofessionalout-boardeffectsprocessors.

• AneffectBalanceknobwhichenablesyoutoadjusttherelativeamountofSend(“dry”)versusReturn(“wet”)effectsignalbeingroutedtothespeakeroutputs.

•Electronicallybalanceddirectoutputthatprovidesameansofroutingsignaltoprofessionalmixingconsolesinbothliveperformanceandrecordingenviron-ments.Agroundloopswitchhelpspreventhumorbuzzfromenteringthesig-nal,andapre/postswitchallowsthedirectsignaltobederivedeitherbeforeoraftertheampEQsection.

• RuggedconstructionmakestheVX2510&VX2515eminentlyroad-worthy.

Features

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Guided Tour - VX2510 & VX2515 Front Panel

1. Passive Input jack-Ifyourbassguitarhaspassivecircuitry,connectittotheModel2500here.Thisstandard,1/4”unbalancedjackprovidesahighimpedance(100kOhms)inputsensitivityof20millivolts.

2. Active Input jack-Ifyourbassguitarhasactivecircuitry,*connectittotheModel2500here.Thisstandard,1/4”unbalancedjackprovidesahighimpedance(100kOhms)inputsensitivityof60millivolts.

3. Pre-Amp A (Tube Emulation) control-Thisdeterminestheamountofpreamplificationbeingprovidedbyspecialcircuitrywhichdeliversthesoundofaclassictubeamplifier.NotethatwhenbothPre-Ampknobsareusedatequalsettings,theamplifierwillbetwiceasloudaswhenonlyoneisused.AvoidsettingbothPre-Ampknobsonmaximum(“10”),sincetheresultwillalmostalwaysbeundesirabledistortion.

4. Pre-Amp B (Solid State) control -Thisdeterminestheamountofpream-plificationbeingprovidedbyspecialcircuitrywhichdeliversthesoundofasolidstateamplifier.NotethatwhenbothPre-Ampknobsareusedatequalsettings,theamplifierwillbetwiceasloudaswhenonlyoneisused.AvoidsettingbothPre-Ampknobsonmaximum(“10”),sincetheresultwillalmostalwaysbeundesirabledistortion.

* Bass guitars that have active circuitry normally require a battery for the cir-cuitry to be functional.

HA2500 2

1 4

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Guided Tour - VX2510 & VX2515 Front Panel

5. Compression control-Thisdeterminestheamountofcompression(peaksignalreduction)bysimultaneouslyadjustingboththresholdandcompres-sionratio(whichrangesfrom2:1toinfinity[limiting]).Atthefullycoun-terclockwise“Off”position,thecircuitryisbypassedandnocompressionisapplied(theknobclickswhensettothe“Off”position).Astheknobisraisedclockwise(atsettingsfrom“1”to“∞”)increasingamountsofcompressionareapplied.Formoreinformation,seethe“AboutCompression”sectiononpage12ofthismanual.

6. Graphic Equalizer In/Out switch-Whenpressedin(the“In”position),theModel2500’sgraphicequalizercircuitry(asdescribedin#7below)isopera-tional.Whenpressedout(the“Out”position),itisbypassed.Theprovisionofthisswitchallowsyoutosetupacustomequalizationcurve(anequalization“preset”)withthegraphicEQsliders,whichcanthenbeactivatedwiththepressofasinglebutton.

7. Graphic Equalizer -Theseslidersallowyouto“draw”thetonalresponseofthesystembyadding15dBofboostorattenuationtotendifferentnarrow-bandfrequencyareas(30Hz,64Hz,125Hz,250Hz,500Hz,1kHz,2kHz,3kHz,5kHz,and8kHz),affectingthemainoutputsignaloftheModel2500.Whenasliderisatitscenterdetented(“0”)position,theselectedfrequencyareaisunaffected(itissaidtobeflat).Whenasliderismovedup(abovethe“0”position,towardsthe“+15”position),theselectedfrequencyareaisboosted,andwhenitismoveddown(belowthe“0”position,towardsthe“-15”position),theselectedfrequencyareaisattenuated.Formoreinforma-tion,seethe“AboutEqualization”sectiononpages10-11ofthismanual.

8. Contour Low Pass control -Thisactsasabroad-bandlowfrequencyequalizer,providing18dBofboostorattenuationat100Hz.Youshouldgenerallyadjustthiscontrol(andtheContourHighPasscontrol,describedin#9below)priorto“fine-tuning”thesystemwiththegraphicequalizer(asdescribedin#7above).Formoreinformation,seethe“AboutEqualization”sectiononpages10-11ofthismanual.

9. Contour High Pass control-Thisactsasabroad-bandhighfrequencyequalizer,providing18dBofboostorattenuationat10kHz.Youshouldgenerallyadjustthiscontrol(andtheContourLowPasscontrol,describedin#8above)priorto“fine-tuning”thesystemwiththegraphicequalizer(asdescribedin#7above).Formoreinformation,seethe“AboutEqualization”sectiononpages10-11ofthismanual.

10. Master Volume control -Thisistheoverallvolumecontrol.Forbestsignal-to-noiseratio,keeptheoutputofyourbassatornearmaximumandadjusttheamp’sMasterVolumetothedesiredlevel.

11. Power LED-LightswhenevertheModel2500ispoweredon.

12. Power switch-UsethistopowertheModel2500onoroff.

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Guided Tour - VX2510 & VX2515 Rear Panel

1. Fuse sled -ThiscontainsafuseholderandshowsthecurrentlyselectedvoltageratingforyourModel2500.Makesurethevoltagerat-ingiscorrectlysetbeforepoweringuptheamplifier!Fuseratingsare10ampfor115vacand6.2ampfor230vac.Forinformationonhowtochangethevoltagerating,seeAppendixBonpage14.

2. AC input-Connectthesuppliedstandard3-pin“IEC”plughere.

3. Fan-ThefanprovidesvitalcoolingtoyourModel2500.Makesurethatitiskeptfreeofallobstructionsandthatcool,freshairisaccessibleatalltimes.Also,trytoensurethattheModel2500isusedinadust-freeenvironment.

4. Effect Return jack-Usethis1/4”unbalancedjacktoreturnlowimpedance(600ohm)signaltotheModel2500fromaprofessionaloutboardeffectsprocessor.*

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1 3 4 5

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Guided Tour - VX 2500 Rear Panel

5. Effect Send jack-Usethis1/4”unbalancedjacktosendlowimped-ance(100ohm)signalfromtheModel2500toaprofessionaloutboardeffectsprocessorsuchasareverb,echo,chorus,flanger,orharmonizerdevice.*Outputlevelisapproximately0dBto+4dBandispost-EQandpost-compressionbutunaffectedbythesettingoftheMasterVolumecontrol.YoucanalsousetheEffectSendjacktoroutesignaltoanexternalmixingconsoleoramplifierwithaninputsensitivityof+4dB.

6. Speaker outputs-TheVX2510&VX2515internalspeakersystemisconnectedhere.

* In-line effects (such as footpedals) intended for low signal levels should be placed between the bass and the amplifier Input and not connected with the Effect Send and Return jacks.

** Note that the settings of the ten-band graphic equalizer will affect a “Post” Direct Out signal regardless of the position of the front panel In/Out switch.

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Setting Up and Using the VX2510 & VX2515

INPUT

PASSIVE

ACTIVE

o

POWER

WARNING: Hartke amplifiers can deliver very high power levels. Driven to full power, they can damage connected loudspeakers, regardless of brand, size, or configuration. Care should be taken not to strain connected loudspeakers as this can cause permanent damage and will degrade the performance of the entire system. If you see connected loudspeakers moving excessively, turn your sys-tem down immediately or use the equalization and/or compression controls to reduce the amount of subharmonic (extremely low frequency) signal.

SettingupyourHartkeSystemsVX2515/VX2510BassAmplifierisasimpleprocedurewhichtakesonlyafewminutes:

1.Removeallpackingmaterials(savethemincaseofneedforfutureservice)anddecidewheretheamplifieristobephysicallyplaced.Toavoidpotentialoverheatingproblems,besurethattherearpanelisunobstructedandthatthereisgoodventila-tionaroundtheentireunit,particularlybehindtherear-panelfan.

2.Locatetheincludedcasters,whicharepackedseparatelyintheshippingcarton,andfollowtheinstallationinstructionsoutlinedinAppendixAonpage13ofthismanual.

3.Next,connectthe3-pinACplugintoanygroundedACsocket.Don’tturntheamplifieronjustyet,though.

4.Useastandardmusicinstrumentcabletoconnectyourbasstotheappropri-ateInputjackonthefrontpanel(ifyourbasshasactivecircuitry,*connectittothe“Active”input;ifnot,connectittothe“Passive”input).OnthefrontpaneloftheModelVX2515/VX2510,settheMastervolumecontrolto“0”(fullycounterclockwise)andsetbothPre-AmpA(Tube)andB(SolidState)knobsto“5”(thetwelveo’clockposition).SettheCompressionknobtoits“Off”position(fullycounterclockwise—you’llhearaclick)andsetbothContourknobstotheircenterdetented“0”position.Finally,setthegraphicequalizerIn/Outswitchtoits“Out”position.

5.PressthefrontpanelPowerswitchinordertoturnontheamplifier.Afterapproximatelythreeseconds,you’llhearaclick,indicatingthattherelayprotectioncircuitryhascompletedcyclingandthatpowertothesystemhasbeenprovided.

6.Settheoutputofyourbasstomaximumandthen,whileplaying,slowlyturntheMastervolumecontrolupuntilthedesiredlevelisachieved.IfyouheardistortionevenatlowamplifierMastervolumesettings,backofftheoutputofyourbass(orcheckforafaultycable).

*Bassguitarsthathaveactivecircuitrynormallyrequireabatteryforthecircuitrytobefunctional.

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Setting Up and Using The VX2510 & VX2515

PRE AMP

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A B

TUBE SOLID STATE

CONTOUR

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15-18

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LOW PASS HIGH PASS

COMPRESSION

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Model2500EffectSend/Returnjacks

IN

OUT

+15+12+9+6+3+2

-2-3-6-9

-12-15

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-15

8KHz5KHz3KHz2KHz1KHz500Hz250Hz125Hz64Hz30Hz


GRAPHIC EQUALIZER

IN

OUT

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GRAPHIC EQUALIZER

IN

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GRAPHIC EQUALIZER

7.ExperimentwithalteringthebalanceofthetwoPre-Ampknobs,listeningtotheeffecteachhasontheoverallsound.Dependinguponthespecificinstru-mentyouareusingandyourpersonaltaste,youmaypreferthesoundofoneovertheother,oryoumaypreferaparticularblendofthetwo.Notethat,whenbothareusedatequalsettings,theamplifierwillbetwiceasloudaswhenonlyoneisused.Instep#4onthepreviouspage,werecommendedthatyoubeginwithbothknobsattheirmidway“5”setting,butthetwoPre-Ampknobscaninfactbesettoanyblendyoulike.However,youwillusuallywanttoavoidsettingbothtotheirmaximum“10”positionsincethissettingwillalmostalwaysresultinundesirabledistortion.

8.WhenyouhavesettledonaPre-Ampbalance,thenextstepistoadjustthetwoContour(bassandtrebleequalizer)controlstotaste.Formoreinformation,seethe“AboutEqualization”sectiononpage13ofthismanual.Whenyougetagreatsettingthatcomplementsyourinstrumentandplayingstyle,it’sagoodideatowriteitdownforfutureuse.

9.Next,experimentwiththeModelVX2515/VX2510graphicequalizer.Beginbysettingeachofthetensliderstotheirflat“0”centerdetentedposition.ThenpressintheIn/Outswitch(toits“In”position)sothatthegraphicequalizerisacti-vated.Finally,moveeachsliderinturnasyouplayyourbass.Formoreinforma-tion,seethe“AboutEqualization”sectiononpage13ofthismanual.Again,whenyougetagraphicequalizationsettingthatcomplementsyourinstrumentandplayingstyle,it’sagoodideatowriteitdownforfutureuse.

10.NowtryouttheModelVX2515/VX2510compressioncircuitry.ActivateitbyturningtheCompressionknobclockwisefromits“Off”position(you’llhearaclickwhenitisactivated).Asyouturntheknobclockwise,theinputsignalfromyourbassbecomesmoreandmoreseverelycompressed—you’llhearpeaksignals(suchasstringslapsandpulls)begintosoundincreasingly“squashed,”relativetothelower-levelsignalsproducedbystandardplaying.Theresultwillbeadecreaseddynamicrangebutanoveralllevelingofsignalthroughoutthefullpitchrangeofyourinstrument.Formoreinformation,seethe“AboutCompression”sectiononpage15.IntheModel2500,theCompressionLEDwilllightsteadilygreenwhennocompressionisbeingapplied,willgooutwheneversmallamountsofcompressionarebeingappliedandwillflashorlightsteadilyredwhenlimiting(severecompression)isbeingapplied.

11.Ifyou’reusinganexternalsignalprocessor,turnyourHartkeamplifieroffmomentarilyandthenconnectastandardaudiocablebetweentheEffectSendjackandyoureffectsprocessorinputandanotherstandardaudiocablebetweentheEffectReturnjackandyoureffectsprocessoroutput(ifrequired,multipleeffectsprocessorscanbedaisy-chainedtogether,outputtoinput).Thenturntheampbackonandplayyourbasswhileadjustingthecontrolsofyouroutboardeffectsprocessor(s).Forbestresults,setboththeinputandoutputgainofallconnectedeffectsprocessor(s)to0dB(unitygain),sothatthereisnoincreaseordecreaseinlevelwhethertheeffectsareswitchedinorout.

Ifyouhavefollowedallthestepsaboveandarestillexperiencingdifficulties,callSamsonTechnicalSupport(516-932-1062)between9AMand5PMEST.

*FormoreinformationontheuseoftheHartke2500effectBalancecontrol,seepage10inthismanual.

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About Equalization

CONTOUR

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LOW PASS HIGH PASS

ContourcontrolsIN

OUT

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GRAPHIC EQUALIZER

IN

OUT

+15+12+9+6+3+2

-2-3-6-9

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GRAPHIC EQUALIZER

IN

OUT

+15+12+9+6+3+2

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GRAPHIC EQUALIZERGraphicequalizer

TheHartkeSystemsModel2500BassAmplifiergivesyouenormouscontrolovershapingthesoundofyourbass,usingaprocesscalledequalization.Tounderstandhowthisworks,it’simportanttoknowthateverynaturallyoccurringsoundconsistsofabroadrangeofpitches,orfrequencies,combinedtogetherinauniqueway.Thisblendiswhatgiveseverysounditsdistinctivetonalcolor.EQcontrolsallowyoutoalterasoundbyboostingorattenuatingspecificfrequencyareas—theyoperatemuchlikethebassandtreblecontrolsonyourhi-fiamp,butwithmuchgreaterpreci-sion.TheModel2500providesyouwithtwodifferentmeansforequalizingyourbasssound:

• LowPassandHighPassContourcontrolsprovide18dBofcutorboostintwobroadfrequencybands.

• AGraphicEqualizerprovides15dBofcutorboostintennarrowfrequencybands.

Normally,youwilladjustthetwoContourcontrolsbefore“fine-tuning”yourEQwiththeGraphicEqualizer.TheLowPassContourcontrolaffectsabroadbandoffrequen-cieswith100Hzasthecenterpoint;similarly,theHighPassContourcontrolaffectsabroadbandoffrequencieswith10kHzasthecenterpoint.Wheneitherisinitscen-terdetentedposition(“0”),itishavingnoeffect.Whenitismovedrightofcenter,theparticularfrequencyareaisbeingboosted;whenitismovedleftofcenter,thefre-quencyareaisbeingcut(“attenuated”).Becausethereisverylittlebassguitarenergyat10kHz,theHighPassContourcontrolshouldbethoughtofasyouroverall“noise”control—turningitdown(totheleftofthe“0”position)willhelptoeradicatehissandbuzzwhilehavingverylittleeffectonthebassguitarsignal.Similarly,theLowPassContourcontrol,whensetleftof0,canbeusedtoeliminaterumbleand“woofiness.”

Theten-bandgraphicequalizerprovidestensliders,eachcorrespondingtoasinglenarrowfrequencyband(at30Hz,64Hz,125Hz,250Hz,500Hz,1kHz,2kHz,3kHz,5kHz,and8kHz).Thisallowsyouto“draw”thedesiredtonalresponseofyoursystem.Whenasliderisinitscenterdetentedposition(“0”),itishavingnoeffect.Whenitismovedabovecenter(towards“+15”),theparticularfrequencyareaisbeingboosted;whenitismovedbelowcenter(towards“-15”),thefrequencyareaisbeingattenu-ated.Wecarefullyselectedthesefrequencyareasbecausetheyhavemaximumimpactonbasssignals.Forexample,thelowestslider(30Hz)affectstheverylowestaudiblefrequencies(infact,mosthumanscannothearbelow20Hz),whilethehigh-estfoursliders(2,3,5,and8kHz)affectsthe“twang”ofabassstring.

WARNING: Use caution when raising the 30 Hz slider above 0 if you are operating at high volume levels (especially if Compression is not being used) since this can place undue stress on connected loudspeakers.

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About Equalization

IN

OUT

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GRAPHIC EQUALIZER

IN

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GRAPHIC EQUALIZER

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GRAPHIC EQUALIZER

Tofindouthoweachgraphicequalizerslideraffectsthesoundofyourparticularbass,startwithalltenbandsflat(thatis,alltenslidersattheirdetented“0”centerposition).Then,onebyone,raiseandlowereachslider,listeningcarefullytotheeffectofeach.Ifyoudon’tspecificallyneedtoutilizetheten-bandgraphicequaliz-er,bypassitbysettingtheIn/Outswitchtoits“Out”position.Alternatively,youcanpresetacustomgraphicequalizationcurve(forexample,forafeaturesolo)andacti-vateitsimplybypressingtheswitchwhenneeded.NotethatturningallEQcon-trolsupthesameamountwillhavevirtuallythesameeffectassimplyturninguptheMasterVolume;conversely,turningthemalldownthesameamountwillhavevirtuallythesameeffectasturningdowntheMasterVolume.Bothapproachesarepointless(afterall,that’swhywegaveyouaMasterVolumecontrol!)

Inmanyinstances,thebestwaytodealwithequalizationistothinkintermsofwhichfrequencyareasyouneedtoattenuate,asopposedtowhichonesyouneedtoboost.Beawarethatboostingafrequencyareaalsohastheeffectofboostingtheoverallsignal;specifically,toomuchlowfrequencyEQboostcanactuallycauseoverloaddistortionorevenharmaconnectedspeaker,thoughtheModel2500’scompressioncircuitry—ifon—willacttosomeextenttopreventthisfromoccur-ring.Ingeneral,ifyou’regoingtoapplyafairamountoflowfrequencyEQboost,it’sagoodideatokeepCompressionon,ifonlytoprotectyourspeakersfrompotentialdamage.

ThespecificEQyouwillapplytoyourbasssignalisverymuchdependentuponyourparticularinstrumentandpersonaltasteandplayingstyle.However,hereareafewgeneralsuggestions:

• Forthatsuper-deepreggaeorMotownsound,boostlowfrequenciesslightlywhileattenuatingthehighestones(leavemid-rangefrequenciesflatorslightlyattenuated),asshownintheillustrationontheright.

• Toremoveboxinessandmakeyourinstrumentsoundmore“hi-fi,”tryattenuatingmid-rangefrequencieswhileleavinglowandhighfrequencysettingsflat,asshownintheillustrationontheright.

• Foratwangy,cuttingsound,tryboostingthehighandhighmid-rangefrequencies,asshownintheillustrationontheright(puttingnewround-woundstringsonyourbasswillhelpalotalso!)

• WheneveryougetareallygoodEQsettingforaparticularinstrumentorsong,writeitdown(you’dbeamazedhoweasyitistoforgetthesethings!).

Finally,asyouexperimentwiththeEQcontrolsoftheModel2500,don’tforgetthatyourbassalsoprovidesEQcontrolsintheformofitstonalsettings—thiscanbeparticularlyeffectiveininstrumentsthathaveactivecircuitry.Also,tryvariousEQsettingswithdifferentPre-AmpblendsandwithandwithoutCompression.Formoreinformation,seethe“AboutCompression”sectiononthefollowingpage.

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About Compression

COMPRESSION

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VX2510&VX2515Compressioncontroland

LED

Thedynamicrangeofasoundisthedifferencebetweenitsloudestandsoftestpoints.Forexample,asyouplayyourbass,you’llprobablyfindthatsomenotes(forexample,notesplayedontheupperfretsoftheloweststring)areconsiderablylouderthanothers.ThefunctionoftheCompressioncircuitryintheModel2500BassAmplifieristoreduceoveralldynamicrangebyautomaticallyreducingtheleveloftheloudestsoundsyouplaysothattheyarecloserinleveltosofterones—theendresultisthatthesound“evensout”andallnotesplayedhaveprettymuchthesamelevel.

Thefront-panelCompressioncontroldeterminestheamountofcompression(peaksignalreduction)bysimultaneouslyadjustingboththresholdandcompressionratio(whichrangesfrom2:1toinfinity[limiting]).Atthefullycounterclockwise“Off”posi-tion,thecircuitryisbypassedandnocompressionisapplied(theknobclickswhensettothe“Off”position).Astheknobisraisedclockwise(atsettingsfrom“1”to“∞”)increasingamountsofcompressionisapplied.Atthehighestsettings,loudsoundswillnotjustbecompressed,butlimited,wheretheoutputremainsvirtuallyconstantregardlessofinput.

TheModel2500providesafront-panelCompressionLEDwhichactsasausefulvisualindicatorofthecontinuousactivityofthecompressioncircuitry.Whenlitsteadilygreen(forexample,whentheCompressionknobissetto“Off”),nocompressionisbeingapplied.Whenunlit,compressionisbeingappliedtotheincomingsignalataratioofapproximately2:1.Whenflashingred,thecompressionratioisapproach-inginfinity(limitingisbeingapplied).Whenlitsteadilyred,thesignalisbeinglimited.ThisLED“follows”theincomingsignal,changingcontinuouslyasdifferentamountsofcompressionand/orlimitingarebeingapplied.

Compressionhasthreemainuses.First,asjustdescribed,it“evens”outthenotesplayedbyyourbasssothattheyallappearatvirtuallyequallevel.Second,itadds“punch”toasound;sincealllevelsarenearlythesame,youcanplaywithgreaterforcewithoutworryingabouttheloudestnotesdistorting.Finally,itservestoprotectyourloudspeakersfromdamageasaresultofbrief(transient)highoutputlevels,asmightbecausedbyfinger-poppingorotherperformancetechniques.

WhetherornotyouneedtousecompressionwithyourModel2500willbeamatterofpersonaltasteandplayingstyle—experimentandseeifyouliketheeffect.Ifyouusuallyplayatlowvolumelevels,you’llfindthat,evenwiththeCompressionknobturnedup,thecompressioncircuitrymayhavenoaudibleeffect,soitmightaswellbeoff.Ingeneral,ifyoudon’tneedcompression,leaveitoff.

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Appendix A: CASTER INSTALLATION

• Locateonecasterandfoureachofthesuppliedscrewsandlockwashers.

• Holdthecasterinplaceandhandstartthescrews.Becarefultoensurethatthescrewsareontheproperthreadchase.DONOTPUSHTEENUTINTOENCLOSURE.

• Useascrewdrivertotightenthefourscrews.Becarefulnottoovertightenthescrews.

• Repeatthestepsabovefortheremainingthreecasters.

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Appendix B: Block Diagram

Model2500

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Appendix C: Changing the VX2510 & VX2515 Voltage

16

Specifications

Input Sensitivity PassiveInput 100kOhms20mv. ActiveInput 100kOhms60mv.

Rated Output Power 250watts@4ohms Total Harmonic Distortion lessthan.5%

Signal To Noise Ratio approx.78dBm

Equalizer ContourLowPass ±18dB@100Hz ContourHighPass ±18dB@10kHz Ten-BandGraphic ±15dB,centerdetented @30Hz,64Hz,125Hz,250Hz,500Hz,

1kHz,2kHz,3kHz,5kHz,8kHz

Compression Ratio 2:1toinfinity

Send Output Level 0dBM

Return Input Level 0dBM VX2510 Speaker System Impedance (Ohms) 4OhmsImpedanceLow Frequency Drivers 2-10"SpecialDesign8ohm,150wattSpeakers,High Frequency Driver 1”ThroatCompressionDriver

VX2515 Speaker System Impedance (Ohms) 4OhmsImpedanceLow Frequency Drivers 1-15"SpecialDesign4ohm,250wattSpeakers,High Frequency Driver 1”ThroatCompressionDriver

VX2510 Weight 75lbs.(34kg)Dimensions Height:29."(73.3cm) Width:26.5"(67.6cm) Depth:17.25"(43.5cm)

VX2515 Weight 76.5lbs.(34.8kg)Dimensions Height:30.75"(78cm) Width:26.5"(67.6cm) Depth:17.25"(43.5cm)

Hartke45GilpinAvenue

Hauppauge,NewYork11788-8816Phone:1-800-3-SAMSON(1-800-372-6766)

Fax:631-784-2201www.hartke.com

vx2515 vx2510 - samsontech designed transducers ... also allows you to smooth out volume differences...

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