Audio Research Reference Anniversary Preamplifier Research Reference Anniversary Preamplifier ... ,...
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Audio Research Reference
Anniversary Preamplifierby Marc Mickelson, April 23, 2011 © www.theaudiobeat.com
prilmaybe“thecruelestmonth,”asT.S.Eliot wroteintheopeningto“TheWasteLand,” buthecertainlydidn’thavetheAudioResearchReferenceAnniversarypreampinmindwhenhepennedoneofhismostfamouslinesin1922.ItseemslikeAudioResearchbeganmakingaudiogearin1922,butit’sonlybeensince1970.WilliamZ.Johnsonlaunchedhiscompany--atthetime,theonlyoneintheUSmakingvacuum-tubeaudioelectronics--withasingleampandpreamp,butmorethan50differentampsand30preampshavefollowed.PreampshavebecomeAudioResearch’ssignatureproduct,beginningwiththeSP-1in1972,whichcost$750andcommandsasmuchontheusedmarkettoday.AudioResearch’sfirsttwo-chassispreampwasthe$3500SP-10,whichwasintroducedin1982,andthiswasfollowedbyperhapsthegranddameofthecompany’svintagepreamps,the$4900SP-11,in1985.AudioResearchintroduceditsfirstReference-seriespreamp,theReference1,inearly1996,beginningarunofmodelsthatleadsuptothecurrentReference5.
WhatthevacuumtubedoesanyofthishavetodowithApril?ItwasayearagothismonththatAudioResearchdecidedtocelebrateits40thanniversary.Whilesomecompanieswouldthrowalavishparty,MinnesotamodestydictatedthatAudioResearchwouldcreateacommemorativeproductinstead.Ithadtobeapreamp,giventhecompany’slegacy,sotheReferenceAnniversarywasborn.Itisthefirsttwo-chassisAudioResearchpreampin20years,andittakesadvantageofthecollectiveknowledgethecompanygainedduringitslongtenurebuildingtubedaudioelectronics.
TheReferenceAnniversary’stwochassiswerenecessarybecauseoftheambitionofitsdesign.Itfeaturestrulyseparatesignalpathsandpowersuppliesforeachchannelandtwicethepower-supplyenergystorageofanypreviousAudioResearchpreamp--8000microfaradsintotal.Forcomparison,AudioResearch’sVS115,a115Wpcstereoamplifier,has3760µF.Themostvisibleinternalparts,evenmoresothanthetubes,arethe
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fourhugeTefloncouplingcapscreatedspeciallyfortheReferenceAnniversary.Eachweighsovertwopoundsandisthesizeofapopcancutinhalf.Eight6H30s,thelatestbreedofdual-triodetubes,resideinthemainchassis,providingthegain.Thesewerechosenfortheirhightransconductanceandlownoise,whichtranslatetobetterperformancethanthemorecommon12AU7or6922.Twomore6H30sareinthepowersupply,eachdrivingasingle6550Cpentode,acommonamplifieroutputtube.Likethetubesinthemainchassis,thoseinthepowersupplyarededicatedtoseparatechannels,signalingthattheReferenceAnniversaryisdualmonofromthe20Apower-cordinlettothevolumecontrol.Thisisanoteworthyfeat,giventhatit’salltubeandfullybalancedaswell.
Functionally,theReferenceAnniversaryisidenticaltotheReference5(andReference3beforeit).Thevacuum-fluorescentdisplayisthesame,andtheremotecontrolforeitherunitwilloperateboth.SomepeoplehavecarpedthattheReferenceAnniversarydeservesachunky,hewn-from-a-block-of-titaniumremote,butIdisagree.AudioResearch’selegantlysimpleremotesblendwiththevisualsimplicityoftheproducts,andtheyaren’tsobulkyastobreakifyoudropthem--orsoheavyastodamagewhatevertheyfallon.Andifyoulosetheremote,youwon’thavetopayanoutrageousamountforareplacement.Probablythemostforward-thinkingoftheReferenceAnniversary’sfunctionsisthetube-lifecounter.Nomorewillyouhavetoguessathowmuchtimethetubeshavebeeninoperation--thepreampwilltellyouatthepushofabutton.
Aesthetically,theReferenceAnniversaryrepresentsafurtherrefinementofthewell-establishedAudioResearchstyle.Youcanhaveblackorsilverfaceplatesandhandles,althoughineithercasetherowofbuttonsonthefront
remainssilver.Thechassisarebig,soyou’llneedsomeseriousroomonyourrackforthem.Theylinkwithapairofumbilicalsthatyou
mustbecarefulneithertoconnectnordisconnectwhenthepreampispluggedin.Thinkingahead,
AudioResearchwarnsyouofthiswithacan’t-miss-itstickerontheback.
PriortoreceivinganewAudioResearchproductforreview,InormallygetaprimerfromWarrenGehl,the
company’sin-houselistener,regardingbreak-in.BeforeWarrenandItalked,Ihad
heardrumorsthatbreak-infortheReferenceAnniversarywasanordeal--atthe500-hourmark,I’djustbeginturningthesoniccorner.ThecauseisthoselargeTefloncaps,whichrequireagreatdealofusebeforethey’reconditionedsufficientlytosoundthewaytheyultimatelywill.Ican’tconfirmordenythe500-hourrule,however,because
theunitIreceivedhadclockedover1000hoursof
use.FortunatelyforReferenceAnniversaryowners,the6H30
tubesareratedfor4000hoursandthe6550Csfor2000,andretubingdoesn’trequireanewbreak-incycle.
More and more
yfirstexposuretotheReferenceAnniversary cameatAudioResearchlastsummer.Itwas memorable.Normallyonemustassessademosysteminitsentirety,becauseofthenumberofvariablesinvolved:speakers,electronics,sources,andcablesallarrayedinaroomwhoseinherentsoundiscompletelyunknown.However,IhaveheardAudioResearch’ssystemmanytimes,soIwasfamiliarwithitsgeneralpersonalityandcapabilities.Italwayscastsawideandespeciallydeepsoundstage,anditdisplaysabundanttonalcolorandthree-dimensionalpresence.Butduring
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myvisitlastsummertherewassimplymore:morewidthanddepth,morecolorandpresence,moredimensionality,moreair,morebassweightandpower.Thistime,theReferenceAnniversarywaspartofthesystem,pairedwithReference210monoblocks--ampswhosesoundIknowwell.Whileitseemedimpossible,ItrulybelievedIcoulddiscerntheReferenceAnniversary’scontributions,mainlybecausethepresentationwassupercharged,reachinglevelsofspatialandtonalrealitythatwereatoncestartlingandthenmesmerizing--nottomentionbeyondanythingIhadeverheardinAudioResearch’sdemoroom.
Inmysystemmanymonthslater,theReferenceAnniversarypickedupwhereitleftoffinMinnesota.Beforeitarrived,IhadbeenlisteningtotheReference5andhearingwhatwascertainlyasclosetotheReferenceAnniversary’sabsorbingsplendoraspossible.Thescale,dimension,tonalityandpowerwereapparent--andthenmoreapparentoncetheReferenceAnniversarymadeitsdebut.Immediatelyobviouswasanoverwhelmingsenseofcomposure,themusiccomingfromadeeperpointoforigin.Thebackdropwasblackerforsure,signalingthattheReferenceAnniversaryhadverylownoise.Butalongwiththiswasasenseofcalm,whoseelementsincludedapreternaturallackofgrainandeffortlessdynamics.Transientsachievedmaximumaccelerationinaninstant,thenfadedtoutterblackness.Instrumentalandvocaltextureswerevividandtangible,impartingaviewofthemusicthatwasholographicanddenselyphysicalatthesametime.
SayingthattheTurtleIslandStringQuartet“hadpresence”onitsCDofjazzstandards,A Love Supreme: A Tribute to John Coltrane[TelarcCD-80684],wouldcertainlybeaccurate,butitwouldn’tfullycapturetheReferenceAnniversary’sabilities.It’snotjustpresence--thesensethatthemusiciansareinthelisteningspace--butalso
supremedelineation.Tonalitywassaturated,eachinstrument’svoicegenuineanddistinct.AndallofthishappenedwithdynamicalacritythatwasclosertothatoflivemusicthanI’ve
heardfromanypreamp.ThesmalldipsandrisesinvolumeasthestringedinstrumentsprobedtheopeningtoColtrane’smasterworkwereequallylucid.Atoncethestringswereindividualentities,andthentheyconveyedasenseofmassedpowerthatwasstunning.
I’mprobablynotdescribingthiswell,ordescribingitinawaythatistruetotheexperienceofhearingit.It’sone
ofmanywaystheReferenceAnniversarydefiesproperexplanation,perhapsbecausetheaudiophilevocabularyissimplyinadequate.Thebasswasmorestraightforward,offeringcontrolandauthorityalongwithbloomandweight.Itwasnaturallyrendered--neitherakintoadepthchargenorasledgehammer,theentirebassrangepouringforthwithrealisticpaceandeffortlessdynamics.
Thedynamicrangeofbassfrequenciesiseasy
tooverlookamidstthesortoflow-endreachandgriptheReferenceAnniversarycansummon,butit’svitaltoitsachievingpowerthat’sreminiscentoflivemusic.
TheReferenceAnniversaryportrayedacousticandelectricbasswithalithenessthatwasunmatchedamongpreampsI’veheard,eithertubeorsolidstate.RayBrown’splayingontheLA4’sPavane Pour Une Infante Defunte[EastWindEW-10003]is,firstandforemost,profuselydetailed.Thisisalate-1970sdirect-to-diskLPwhosesound,I’mconvinced,willbeastonishingbythestandardsofahundredyearsfromnow,andthemusicisinterestingaswell.Whenthestringsaretappedorthumped,thereisnobloatoroverhang--again,thisisaspecialrecording.TheReferenceAnniversaryminedeverybitofit.Brown’splayingdisplayedthesortofelasticenergythatlesser
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recordingsjustdon’tcapture--andlesserpreampsdon’tcommunicate.Themidbasswasripeandnimble,whilethelowestreachesweredefinedbytherecording,nottheReferenceAnniversary.Bassdepthanddefinitionmaybeweakpointsofmanytubedpreamps,butthey’reinthediscussionoftheReferenceAnniversary’sstrengths.
AsarethethingsthatAudioResearchelectronicstraditionallydowell--likeconjureanenormous,etherealsoundstageorriseandfalldynamicallyinauniformandrealisticfashion.TheReference5andReference3beforeitwerechampsatpopulatingthesonicvistawithinstrumentsandtheirdecaytrails,andtheReferenceAnniversarydoesthisevenbetter,furtherelongatingthesoundstagefronttobackandsidetoside.Andwhenitcomestoconveyingthetotalityofdynamicrange,theReferenceAnniversarywasagainthebestI’veheard.Itbothsoaredfromsofttoloud,beginningfromavanishingpointofnoise,andreacted
instantlytosmallshiftsinvolumefromsingersorindividualinstruments,achievingallthiswithsupremedexterity.TheSACDofCountBasie’sclassicontheImpulse!label,Count Basie and the
Kansas City Seven[Impulse!/AnalogueProductionsCIPJ15SA],isachallengingtestofbothacomponent’sresolvingpowerandlow-leveldynamicprowess.TheReferenceAnniversarydugdeeplyintotherecording,revealingallofthefinedetailoftheplayingwhilealsoconveyingamajesticsenseoftheband’smassandthespaceinwhichitwasplaying.Evenatlowlevels,whenthemusicbeginstorecedeintothenoisefloor,theReferenceAnniversarypreservedproperproportion,anditdidthisaswellastheveryquietestsolid-statepreamps.
Arrivingasitdid,inthemidstofmylisteningtotheReference5($11,995),theReferenceAnniversarymadethisreviewadrawn-outcomparisonbetweenthetwopreamps--atleastinitially.It’sonlynaturaltocomparethe
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Price:$24,995
Warranty: Threeyearspartsandlabor.
AudioResearchCorporation3900AnnapolisLaneNorth,Plymouth,Minnesota55447(763)577-9700
www.audioresearch.com
Associated Equipment
Analog:TW-AcusticRavenACturntable,GrahamB-44PhantomSeriesIIandTri-PlanarMkVIIUIItonearms,DynavectorXV-1s(stereoandmono)andAudio-TechnicaAT33EVcartridges,AudioQuestLeoPardphonocable,AllnicAudioH-3000VandAudioResearchReferencePhono2phonostages.
Digital:AudioResearchReferenceCD8CDplayer,AyreAcousticsDX-5universalplayer.
Preamplifier: AudioResearchReference5.
Power amplifiers: AudioResearchReference110stereoamp,LammIndustriesM1.2Referencemonoblocks.
Loudspeakers:ProAcK6,ThielCS3.7,TidalSunray.
Interconnects:AudioQuestWilliamE.LowSignature,ShunyataResearchAerosAurora-IC.
Speaker cables:AudioQuestWilliamE.LowSignature,ShunyataResearchAerosAurora-SP.
Power conditioners:EssentialSoundProductsTheEssenceReference,ShunyataResearchHydraV-RayVersionII.
Power cords:AudioQuestWilliamE.LowSignature,EssentialSoundProductsTheEssenceReference,ShunyataResearchCX-series(various).
Equipment rack and platforms:SilentRunningAudioCraz_8equipmentrackandOhioClassXLPlus2platforms(underLammM1.2amps),HarmonicResolutionSystemsM3isolationbasesunderdigitalgear.
Equipment rack, platforms and accessories:BillyBagsequipmentrackmodifiedwitha4”mapleplatform,StillpointsUltraisolators,StillpointsComponentStands,FurutecGTXD-RhodiumACoutlet.
oldkingtothenew,andbeforetheReferenceAnniversaryshowedup,Iwouldhaveconsidereditslevelofperformanceafantasy.TheReference5isitsownproduct,notsimplyanearanalogoftheReferenceAnniversary.Itsperspectiveisabitmoreforward,anditsbalanceleansabitmoretowardthetreble.Atfirstlisten,itsoundsbrighterthantheReferenceAnniversary,butthisisreplacedbyanunderstandingofthelatter’scomposure,whichismosteasilydiscernedfromtheeeriewaythetreblesettles.Movingdownward,theReferenceAnniversary’smidrangeisconsiderablymoredimensional,anditsbassisbetterrealized--moresubstantialinthemidbassandmorefleetintermsofrhythmicdrive.
WhenitcomestothetraditionalstrengthsofAudioResearchproducts,it’shardtosaythatapreampsoundsbiggerthantheReference5,buttheReferenceAnniversarydoes.It’shardtosaythatapreampsoundsmore
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dynamicallycompletethantheReference5,buttheReferenceAnniversarydoes.ItbuildsontheReference5’sconsiderablestrengthsandbegins
tolaptherestofthefield.Hearingitismandatoryifyou’reshoppinginitssubstantialpricerange--and
educationalifyou’renot.
Cruel April -- for a few more days
heonehitchto ownershipofan ReferenceAnniversary,asidefromitsprice,isavailability.AudioResearchwilltakeordersonlythroughApril.ReferenceAnniversarypreampswillrolloutofthefactoryforafewmonthsafterthat,asthosefinalordersare
filled,butonceAprilends,sodoesyourchancetoownoneofthesebeauties.It’sinevitablethatsomedayabetterpreampwillcomealong,probablyfromAudioResearchitself.Butuntilthattime,theReferenceAnniversarywillbeastandardofsonicperformanceandapieceofaudioequipmentwhoseexistencetrulyiscauseforcelebration.
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