Audionet AMP II MAX Manuale utente

Audionet

AMP II

Mono -Amplifier

Owner'sManual

Owner's manual

TheAudionet-Teamwouldliketocongratulateyou topurchasingthe

AudionetAMPII!YourAudionetAMPII isdesignedforabsolutely

naturalmusicreproduction athighestuser comfortembeddingtotalsys-

temsecurity.

Pleasereadthismanualbefore firstusetomakesure thatyou are ableto

useall provided functions ofyournewamplifier.

Incaseofquestions tooccurpleasedo nothesitatetocontactyourlocal

Audionetdealer orourfactorydirectly.

Setting up yoursystem

YourAudionetAMPII havetheperfectdimensions tobeplacednear

yourspeakers. ButputsidebysidebothAMPII are 43 cminwidth

(standard width).

Do notcover thetop to preventtheamplifiers fromoverheating!

Pleaseconnectthepower jackattherear toyourwall outletusingasuit-

ablepower cord. Usinghighqualitypower cords mayincreasesound

quality. Pleaseconsult you localAudionetdealer.

Thevoltagespecifiedattherear ofyour AMPII mustmatchyour mains

specifications. TheAMP II is a Class Iunit and has to beearthed.

Thecorrectpolarization ofmains isimportantforreasons ofaudioclarity

and stability.Pleasemakesure thatthe"hot"pinofyourpower cordis

connected to theleftpin ofthepower jack (frontview).

Placing

Powerconnections

Polarization

Inputs and outputs

Forconnectingorremovinganyunits theAMPII mustbeswitched off.

Pleasemake surethatall cablesareinabsolutebestcondition. Broken

shields or short-cutloudspeakercablescoulddamageloudspeakers or

theamplifiers!

Atfirstpleaseconnectyourpre amplifier totheinputsofyourAMPII.

Foraudioinputyou canusebalanced(XLR)aswell asunbalanced

(cinch)cables. Forconnections longer than2mwerecommend balanced

cables.

Pleasedon'tforgetto activatetheselected inputin thesetmenu.

Nowconnectyourspeakerstoonepairofthegoldplatedoutputjacks of

yourAMPII. You mayusepure wires or"banana"plugs.

Check thepolarization ofthespeakers cables:

Usuallythespeaker jacks are labeled"+"and "-".You will find thesame

labelatyourAMPII.

Wrong polarization will lead to severeloss ofsound quality!

Thespeaker impedance mustnotbeless than 2

Though your AMPII iseffectivelyprotectedagainstshortedspeaker

jacksit has tobeswitchedoff whileworking on speakers and speaker

cables!

YourAudionetAMPII supportsbi-wiringofloudspeakers. Connectyour

speaker withtwoseparatecablestoeachAMPII.Usingthebi-wiring

method to connectyourspeakers can lead to enhanced sound quality.

Inputs

Speakers

Bi-Wiring

Operating

Switchon yourAMPII attherear side.Theswitchisabovethemains

socket.After someshorttimetheline“Audionet”will appear inthe

display. NowyourAMPII is in stand bymode.

Forswitchingon and off pleasepress the“power”button atthefrontof

theAMPII.Themainswitchatthebackisonlytobeusedifyou are ab-

sentforalonger timeand mustonlybeoperatedwhiletheAMPII isin

stand bymode

Yourbothmono amplifiersAMPII canbeswitchedon remotelybysev-

eraldifferentways:

§ using"AudionetLink":You switchon oroff yourAMPII withyour

Audionetpre amplifier PRE orPRE I

§ usingautomaticdetection ofan inputsignal: "Auto On/Off"

§ usingacountdown ofspecified time.

(Iftheunit isin stand bymode you enter thecorrespondingmenu by

pressingthebutton atthefrontforlonger than 2 seconds.)

Foraremotecontrolledswitchingon byyourAudionetpre amplifier two

simpleoptical"Toslink"are necessary.Connecttheoutputlabeled

"audionetlink"atyourpre amplifier withthe"audionetlink"inputofthe

firstAMPII.Thenconnectthe"audionetlink"outputwiththesecond op-

ticalcableto the"audionet link"inputofthesecond AMPII

TheAMPII isequippedwithamulti-stageinputsignaldetection circuit.

Ifaninputsignalappearsattheinput(XLRorcinch)crossingtheuser

definablethresholdyourAMPII will switchon automatically.Dueto

stereosignalsismayoccurthatbothAMPII will switchon atdifferent

points oftime.

Theamplifierswill function asusual.Of courseyou still beableto

switch on and off theunits manually.

Switching on

Remotepoweron

AudionetLink

AutoOn/Off

Automaticshutdownwill happenwhenno inputsignalisdetectedfora

user definabletime(30 seconds up to 2 hours).

To activateand setup this feature pleaserefer to chapter "Programming".

Duetosecurityconcerns the"Auto-On"featurewill onlybeavailible

after firstmanualswitching on!

Whileyou are absentyourAMPII canswitchon automaticallyand will

bepre-heatedforusewhenyou getback. To activatethisfeature please

usea long keypress on the"power"button atthefront.Thedisplay

changestoshowthecountdowntimer.Acursorwill markthenumber to

bechanged. A long keypress will movethecursoronesteptotheright.

Usinga short keypress you canchangethedesirednumber.Hourscan be

programmedin steps ofonehour. Minutes can beprogrammed in steps of

15 min. Thefollowingdiagramexplains thepossiblecountdowntimer

settings:

01 hour 15 min 01hour 15 min 01 hour 15 min

11 hours 15 min 02hours 15 min 01 hour 30 min

91 hours 15 min 00hours 15 min 01 hour 00 min

10-hours-setting 1-hour-setting Min-setting

Legend:longkeypress shortkeypress

Activecountdownbyleavingthetimer settingmenu witha long key

press. Itwill beactivatedautomaticallyifyou do notchangeanysetting

forlonger than 10 seconds.

Ifyou wanttousethecountdowntimer againit isactivatedbyasingle

keypress. Press the"power"button formore than2seconds and wait.

After 10 seconds theprevious setup countdown will startagain.

To deactiveusea short keypress atanytime.

"Warm Up" Countdown

Protection system

YourAudionetAMPII and yourloudspeakersare protectedbyacom-

plexprotection circuitry. Anyerrorwill beprinted in clear atthedisplay:

§ Overload:Shortedloudspeaker cablesordefectiveloudspeaker (your

AMPII is capableofdrivingeven 1Wloads)

§ Temp Failure:Do notcover theventilation slots

§ HF-Failure:high frequencyoscillation, e.g. defectivepre amplifier

§ DC-Failure:too high levelofDCvoltageattheoutput

Programming

Excepttheprevious describedfeature ofcountdowntimer controlled

automaticpower on yourAMPII canbesetup toyourpreferencesby

menu selections. Thesettingswill lastafter switchingoff theAMPII.

Changingsettingshastobedonewhiletheamplifier isswitchedon and

in operating mode.

Listofsettings to beadjusted to yourpreferences:

· Brightness ofdisplay(also turningoff)

· Displaymode:selected input, temperature, peak-levelmeter

· Inputselection:Cinch orbalanced (XLR)input

· Auto-On:thresholdforlevelcontrolledautomaticpower on (see

above)

· Auto-Off:timeto automaticpower down (see above)

· Choosebetween two texts to bedisplayed in stand bymode

To changesettingsuseshortorlongkeypresseson the"power"button at

thefrontoftheAMPII. Switchon your AMPII and holdthebutton

pressed foratleast2 seconds to enter themenu.

Forfurther operatingpleaseconsult graphicbelow.Alongkeypress will

enter amenu orsub-menu. Useshortkeypressestomovealongthemenu

options.

To savethechangedsettingsusealongkeypress orwait foratleast10

seconds. Forfurther changestothesettingsre-enter themenu asde-

scribed above.

Overview

Operating

SET DIM 100%

80%

50%

25%

Select displaybrightness

(5 steps)

OFF

SET DISPLAY STANDARD Standard display

TEMPERATURE Temperaturedisplay

PEAK-LEVEL Peaklevel meter

SET INPUT CINCH Select cinchinput

BALANCED (XLR) Select balanced(XLR) input

SET AUTO ON NEVER ON Never power onautomatically

FAST ON High sensitivity

MEDIUM ON Mediumsensitivity

SLOW ON Maximumrudgeness

SET AUTO OFF NEVER OFF Never power off automatically

OFF IN 30 SECS

OFF IN 5 MIN

OFF IN 15 MIN

OFF IN 60 MIN

OFF IN 120 MIN

Whenthemusic stopswait

for thespecifiedtimeuntil

automatic power down

EXIT...

Legend:longkeypress shortkeypress

Technical information

TheAMPII isdesignedasadual-mono amplifier.SMDtechniquesare

usedtooptimizehigh-frequencycharacteristics. All signalpaths are re-

ducedtominimumlength. No'evil'elements(likecouplingcpacitors,

coils, relays)are locatedinthesignalpath. Thedesignismagnetically

and capacitivelyoptimized. Negativemagneticand electricinfluence and

interaction betweeninput,decouplingand power section are reducedtoa

residualminimum.

Control,decouplingand power sections haveseparatedtransformersand

rectifiers. Themaintransformer (700 VA) drivestwoSiemens Long-Life

(>250.000h)electrolytecapacitors (33.000mFeach)bySchottkydiodes.

Fortheinputsection Audionetusesalow-noise,monolithicdualFET.

Thegain-bandwidthproductofthesucceedingdual-stagedifferential

voltageamplifier exceeds 1 GHz. Inputand outputsections are decoupled

using'bootstrapped'emitter followers.

Theoutputsection isequippedwithpower MOS-FETs. Theycanhandle

apulsepower up to2.5 kW.Thehighbiascurrentthroughthatstage

(0.4 Amperes)isregulatedactively.Therefore,signalsatnormalvolume

levelare handled pure Class A.

Inorder todeterminetheimpulsepeakleveltheAMPII detectsavoltage

maximumand measures thecurrentflowingatthatpointoftime.Bythat

impedance criticalloudspeakersare processedautomaticallyand aac-

cordingtothatahigher peaklevelisdisplayed. You are giventheexact

effectivepower.Ifno loudspeaker connectedonlyasmall measuringer-

rorisdisplayed(e.g.3.0Winsteadof200Wfora4W-loudspeaker).The

currentnumber isdisplayedforabout2seconds ifnotreplacedbya

higher peak level.

Construction

Powersupply

Circuitry

Peak level meter

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