Audionet AMP II MAX User manual

Audionet
AMP II
Mono -Amplifier
Owner'sManual

2
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.

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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

4
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 W !
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

5
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

6
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

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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

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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

9
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

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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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Securityadvice
¨ Avoid packaging material,especiallyplasticbags,to come
into children’shands.
¨ Store and operatetheunit in adryroomatareasonable
roomtemperature
¨ Avoid moisture oranyliquid to getinto theunit
¨ Setup theunit in afree position so thattheairis allowedto
flowthrough theunit slits,
¨ Donotcover, e.g. with ablanket
¨ Donotopen thecase.Unauthorisedopening will cause
loss ofguarantee.
¨ Useadrycloth forcleaning

12
Technical data
TypeMicroprocessor controlledpower amplifier
Power200 Watt in8W
350 Watt in4W
550 Watt in2W
750 Watt in1W, all trueRMSat 1%THD
Bridgedoperations1400 Watt in4W, twoAMPII per channel
Frequencyresponse0-300.000Hz (-3dB)
Damping factor > 1.800 at 10kHz, (8W)
> 10.000 at 100Hz, (8W)
Intermodulation< -110dB SMPTE (100Hz:200kHz, 4:1), 50W/4W
THD < -100dB for 20Hz..20kHz, 35W/2W
k2typ. -117dB, k3typ. -127dB, at 25W/4W
Noise> 112dB (A) ati 10Veff
> 124dB dynamic at maximuminput
InputsCinch, WBT:37kW, 220pF
XLR, Neutrik:3kW, 170pF (1:GND, 2:Pos, 3:Neg)
Output2pair ofgoldplatedWBTterminals
Mains220..240 Volt /50..60 Hz
3W Stand-By, 100W typ., 700W max.
Dimensions214mm x198mm x500mm (WxHxD)
Weight18kg
Finishfront: brushedAluminum, 10mm
(Frontplate in“alunature” or blackavailible)
Button:chromeor black
Top:brushedAluminum, black
Chassis:Steel, black
Engineered and produced by:
Idektron GmbH&Co. KG, HernerStr. 299, Gebäude 6, 44809 Bochum
www.audionet.de
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