Audionet AMP III Bedienungsanleitung

audionet

amPIII

Stereo -Amplifier

Owner'sManual

Congratulations!

Audionetisproud towelcomeyou intheworldofgermanhigh-end au-

dio!YourAudionetAMPIII isdesignedfornaturaland audiophilemusic

reproduction inconjunction withsafe operation and perfectlong-term

stability.TheAMPIII combinesexcellenthigh-frequencycapabilities

with totalcontrolofyourloudspeakers.

Therefore,it isideallysuitabletobecombinedwiththeAudionetSAM

mainamplifier for"bi-amping".Furthermore,inconjunction withthe

AudionetPREIpreamplifier it formsaworld-class high-end combina-

tion.

First,pleasereadthemanualand theprecautions carefully.TheAMPIII

isacomplexunit and offerssomeuncommon features!Incaseofdiffi-

culties, pleasedo nothesitatetocontactyourdealer orourfactorydi-

rectly!

Installation and powersupply

Pleasefind aplace foryourAudionetAMPIII thatissufficientlyventi-

lated to allowtheheatto dissipate.

Connectthepower jackattherear toyourwall outlet.You shouldeither

usetheprovidedpower cordoranother oneallowedforyourhomecoun-

tryspecifications. Tuningwith"audiophile"power cords canleadtoim-

proved sound field. Ask yourdealer forassistance.

NOTE:Thepower specificationsontherearmustmeet to yourhome

countryspecifications. TheAMPIII isaClass I-systemand mustbe

earthed. Pleaseensure a stableearthconnection.

YourAudionetAMPIII isabletodetectawrongpolarizingofthemains.

Ifyou see thefrontlamp flashingquicklywhen poweringon, flip theplug

in yourwall outlet(also see below).

Additionally,on therear panelyou find amark"phase"nexttothemains

connector.Ifyou havetheoptional"AudionetPower Cord",APC,the

phaseis also marked on thewall plugitself.

Thecorrectpolarizingofthemains isimportantforreasons ofaudioclar-

ityand stability.

Placing

Connecting

Mainsphase detection

Inputs and Outputs

Foraddingorremovingconnections yourAMPIII mustbe

switched off!

Pleasemakesure thatall cablesare inabsolute bestcondition.Bro-

kenshieldsorshort-cutloudspeaker cablescoulddamageloud-

speakers ortheamplifier!

AtfirstconnectyourAMPIII toyourpreamplifier.Normally,theinputs

labeled "directin"should beused forthis purpose.

Additionally, theAMPIII is equipped with an AC-coupled input.

UsingthisinputremovesaDC-offset(directcurrent)fromthesignalof

thepreamplifier byahigh-gradecapacitor.

You shouldusethis"ac-coupledin"only,ifyou haveproblemswith

D.C., whichare notunlikelyespeciallywithactivecrossovers. Bycon-

nectingthesource totheseinputsyou preventaDC-currentflowing

throughtheloudspeaker woofersdecreasingsound dynamicand quality.

InextremecasestheAMPIII mightevenshutdownshowingthe"DC"

flash code(see below).

TheAudionetAMPIII canbeconnectedtoother power amplifiersfor

"multi"-amping.Forthispurposethesignalsfromtheinputare routed

back to theoutputlabeled "out".

Connecttheleftand rightspeakerstothegoldplatedWBTterminalson

therear.Pleasemakesure thattheredoutputs(+) oftheamplifier are

connectedtothepositiveinputsoftheloudspeakers(usuallyred)and the

whiteoutputs(-) are connectedtothenegativeloudspeaker inputs(usu-

allywhiteorblack).

Inputs

Loop output

Speakers

Wrongspeaker polarization will result in severe loss ofsound quality!

Thenominalloudspeaker impedance mustbe4 ohms orhigher.

AlthoughtheAMPIII hasaprotection circuit topreventdamageofthe

system, switch off theunit whileworkingon theloudspeaker cables.

Never useforce ortools tighteningtheterminalscrews!

Forbi-wiringtheloudspeakerswithyourAudionetAMPIII pleaseuse

twoloudspeaker cablesand removethe"bridge"atthespeaker terminals.

Insertthe"tweeter"cablefromtherear usingbananaplugsand mountthe

"bass"cablefromtheside. In doubtpleaseask yourdealer forassistance.

A6.3mm headphonejackislocatedon therear ofyourAMPIII.The

signalon this socketis permanentlyactiveand cannotbeswitched off.

Pleasebeaware thatlisteningmusicviaheadphonescanseriouslydam-

ageyourears!Theprogramcan startsuddenly!

Headphones

Ifyourspeakerssupportbi-wiring,connecteachspeaker with2separate

speaker cables. Bi-wiringcanimprovetheimpulseresponseand spatial

resolution ofyourspeakers.

TheAMPIII istheidealpartner forbi-amping.Incombination witha

second amplifier (e.g.AudionetSAM),thelowrangeand themid/high

rangesection ofyourspeakers can bedriven byseparateamplifiers.

Before you useyoursystemin abi-ampingsetup, pleaseask themanufac-

turer ofyourspeakers, iftheyare abletoworkinabi-ampingenviron-

ment, and ifanymodifications orspecialsetup procedures are necessary.

Warning:Youmustremovethejumpersconnectingtheterminalsof

thelowrangeand mid/highrangeinputsofyourspeakers. Before

switchingonyoursystemforthefirsttime,pleasemakeabsolutely

sure,thatthejumpershavebeenremoved.Otherwisebothamplifi-

ers are shortedagainsteachother and will bedestroyed!

Bi-Wiring

Bi-Amping

Speaker terminal

mid/high range

range

SAM

AMPIII

Warning!

Remove

jumpers!!

Operating

Please,atfirstturndownyourpreamplifier.Thenbringthemainswitch

attherear inthe"on"position. Theswitchislocatedabovethemains

socket. NowtheAMPIII is in stand-bymode.

ForswitchingyourAMPIII on and off,pleaseusethepower button at

thefrontpanelfromnowon. Themainswitchdoesnotneedtobeoper-

atedunless you are absentforalongtime.Itmustonlybeoperatedwhile

theAMPIII is in stand bymode.

Asmentionedabove,yourAudionetAMPIII isabletodetectawrong

polarizingofthemains. Theindication isdonebythefrontLEDbetween

thetouch ofthe"power"ball and the"click"oftheloudspeaker relays.

Ifthepolarizingiscorrect,theLEDflashesÄ_____Ä_____Äetc.

However,ifyou shouldobserveafastsignalÄ_Ä_Ä_Ä_Ä_Äetc., flip

theplugin yourwall outletafter havingswitched off theAMPIII.

WhentheAMPIII isin stand-bymodeits power can becontrolled byany

Audionetpreamplifier usingthe"Audionetlink".Thisfeature isde-

scribed in thepreamplifier manuals, too.

You onlyneedasimpleoptical"Toslink"cable.Connectoneofthepre-

amplifier outputs"AudionetLink"withthe"Link"inputofyourAMPIII.

NowtheAMPIII power followsthepreamplifier.Lengthofthe"Tos-

link"cableisnotcritical-so you canplace theAMPIII nexttothe

speakers ifyou prefer!

Power

Mainsphase indicator

AudionetLink

Protection system

YourAudionetAMPIII isequippedwithoneofthemostpowerfulpro-

tection circuitsavailableon themarket.Sixerrorsare distinguishedand

indicated bythefrontLEDusinga"morse"likecode:

•••Overload left

•• ¾Overload right

• ¾•Temperature error

¾••High-Frequencyerror

¾¾•DCerrorleft

¾¾¾DCerrorright

Incaseofanerrorbeingindicatedpleasecheckthecausereferringtothe

followingtable:

¨ Overload:Short-circuit ofaloudspeaker cableorloudspeaker defect.

¨ Overtemperature:Pleasefree thetop and bottomventilation slots!

¨ HFError:HFoscillation, pleasecheck yourinputsource.

¨ DCError:Dangerous DC-voltageattheoutput: Defectpreampor

activecrossover carryingDC.Pleasetryconnectingthesource tothe

inputs "ac-coupled in"(see above).

Specialities

ForoptimizingtheHigh-FrequencycapabilitiesAudionetconsequently

usesSurface-MountedDevices(SMD).Asaresult thefaster and more

compactcircuitsenabletheengineer touselow-straw and extremeshort

wiring. Theverygood dampingfactoris aresult ofthis, forinstance.

There are separatetransformer windingsand filtersforpre- and power

circuitrytoensure maximumload-independence.Themaintransformer is

rated700VA and drivestwoloadcapacitorsfrom"Audionet"

(2x41.000µF). All 16 rectifyingdiodes are ultra-fast"schottky"-types.

TheAMPIII iscontrolledand supervisedbyapowerfulInfineon micro-

controller.Itchecks themains phase,detectserrorsofthepower stagesin

timeand indicatesthecauseunambiguously.Of courseit isdrivenbyan

oversized power supplyofits own.

IntheinputstageAudionetemploysalow-noisemonolithicDual-FET. A

dualdifferentialgainstagefollowsfeedingmultiplebootstrappedemit-

ter-followers, whichdecouplethepower stagesfromthevoltagegain

stages perfectly.

Afastarithmeticcorrection circuit locallyensuresthatdistortion ofthe

power stagesiseliminatedatonce.ThefastAmerican"IR"Power-

MOSFET-Transistorsensure powerfulloudspeaker controland longterm

stability.

Construction

Powersupply

Microcontroller

Circuitry

Precautions and Care

¨ Preventchildren fromplayingwith plasticbags!

¨ Pleasestore and operatetheunit inadryroomatareasonableroom

temperature

¨ Avoid moisture oranyliquid to getinto theunit

¨ Setup theunit in afree position. Do notcover thetop.

¨ Donotopenthecase.Nouser serviceablepartsinside.Unauthorised

openingwill causealoss ofwaranty.

¨ Do notshort-circuit theoutputterminals.

¨ Pleaseuseadrycloth forcleaning

Wewish you manyexcitinglisteningexperienceswithyourAudionet

products!

Ifyou needfurther information aboutourproductspleasedo nothesitate

to contactyou localAudionetdealer orus directly!

YourAudionetTeam

Andere Handbücher für AMP III

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