Audionet PRE I G2 User manual

Audionet
PRE I G2
Stereo Pre - Amplifier
Owner's Manual

2
Howto operate the Audionet PRE 1 G2
Your AudionetPRE1G2 isahighperformance audiopre-amplifier.This
systemisdesigned forabsolutenaturalmusicreproductionandforhighest
user comfort.
Thefollowingwill giveyouall informationabouthowto operateyour
PRE1G2.Pleaseread thiscarefully before thefirstuse.Followingthese
instructions,your PRE1G2 will giveyoulong-lastingpleasure andsatis-
faction.

3
Connecting the system
Pleaseconnect thepower jack (1) at therear withyour wall outlet(Please
refer topage 8).Usetheprovided power cableoranother oneallowed for
your homecountryspecifications.
NOTE:
The powerspecifications(2) on the rearmustmeet to yourhome
countryspecifications.
The mains-button (3) at rearmustbe switched off.The PRE 1G2 is
aClass Isystemand mustbe earthed.Pleaseensurethat the earth-
connection isin bestcondition.Forbestperformance connect the hot
wireseeing fromthe front with the leftpin.
WiththePRE1G2 comesayellow-greengroundcord foroptimal
groundconnection.Pleaseconnect thisadditionalgroundcord totheplug
(10) attheback ofthePRE1G2 andputtheplug into asocketnear to
thepower cord.
TheAudionetPRE1G2 isaverysensitivesystem.Pleaseensure thatall
used connectorcablesare inabsolutely bestcondition.
Forconnectingorremovingaudiosources,PRE1G2 hasto beswitched
off (standby-state) ormustbemuted.
TheAudionetPRE1G2 hasonebalanced andfiveunbalanced highlevel
RCAinputs(4).Additionally,atrue monitorloopisavailable. Pleasecon-
nectleftandrightinputsto thecorrespondingoutputsofthedesignated
high-levelsource.
Power supply
Ground Connection
Audiosources
Inputs

4
TheAudionetPRE1G2 hasoneunbalanced output (5) andonebalanced
outputforconnectingpower-amplifiers.
Pleaseconnectleftandrightoutputsto thecorrespondinginputsofyour
power amplifier.
Tworecordingsystemscanbeconnected atthesametimeto PRE1G2
forrecordingandplayingback simultaneously.
Forrecordingpleaseconnecttheinputsofyour recordingsystem,like
DATortape deck withthe rec output(6) ofyour PRE1G2.Everytime
whentherecorder isconnected to therec outputs,pleaseusetheinputs
No.5named "Tape" forplayingback.
WheninputNo.5isselected,thecorrespondingrec outputwill bemuted.
Thisisnecessarytoprevent destructiveoscillationofthepre amplifier and
therecorder.Therefore everysignalsource that shouldberecorded hasto
beconnected to theremaininginputs.
Your PRE1G2 isfitted withamonitorloop. Thisenablesyouto listento
therecorder without interruptingthesignal source beingrecorded. Touse
thisfeature pleaseconnect theinputsandoutputsoftherecorder withthe
correspondingmonitoroutputandinput(7) ofyour PRE 1G2.
Your PRE1G2 canbeequipped withanoptionalphonopreamplifier. For
connecting arecord player pleaseusetheinput6andthecorresponding
groundconnectorinthiscase.
IncombinationwiththeAudionet AMP I/AMPII and/orDACthePRE1
G2 canswitchonandoff thewholesystem.PleaseconnecttheAudionet
link(8) ontherear withaToslinkopticalfibre cableto theAudionetlink
ofAMP Iand/orDAC.
Outputs
Recording systems
Rec out
Monitor
Phono
Audionet-link

5
Switching on and off the mains
Your PRE1G2 isdesigned asastand-byunit.Tobringyour PRE1G2
into thestand-bystate,pleasepress themainspower switch(3) onthe
rear.ThePRE1G2 will comeup inthestand-bystatedisplaying Audio-
net”.
Switchingoff themainsattherear isonly necessaryincasesoflonger
absence like holidays.Inthiscase,pleasepress againthemainspower
switchontherear.Lookingfromabove,theswitchnowshowsyoua"0"
andthedisplayturnsoff.
NOTE:
All systems connected with the outputsmustbe off and powered
down when PRE 1G2 isto be switched on oroff the mainsat the
rear.

6
Operating the system
All functionsofyour PRE1G2 are completely microprocessorcon-
trolled.Thisguaranteeshighest precision,exclusivefunctions, easyopera-
tionandprotectionagainstoperationalfaults.
Forswitchingonyour PRE1G2,pleasepress the power buttonatthe
frontpanel.ThePRE1G2 needs5secondsforwakingup andthen
works.
Toswitchoff thePRE1G2,pleasepress the power buttonagainandthe
PRE1G2 needs5secondsagainforgoingto sleep storingall your latest
settings.
Tosetthedesired volume, pleaseturnthe volume knobatthefrontpanel.
Pleaseturnclockwiseif higher andcounterclockwiseif lower volumeis
desired.
ThePRE1G2 showsyouthemaster volumewitharange of86 dB.This
correspondsto -80 dB to +6 dB.At0dB theamplitudesofinputand
outputsignalare equal.Toadjustthevolumeoffsetforeachseparate
channel, pleaseread programming”below.
Thevolumeknobisanincrementalimpulseunitwithoutastop.
Pleaseturnthe input buttonatthefrontpanelto selectoneoftheseven
inputs.ThePRE1G2 sequentially selectstheinputsfromNo. 1toNo. 6.
Whenchangingtheinput,thePRE1G2 regulatesthevolumedownto -
80 dB,mutestheoutputs,switchestheinputs,activatestheoutputsand
finally regulatesvolumeup to thelevelbefore.
Switching on and off inthe
stand by state
Setting the volumelevel
Selecting the inputs

7
Toactivatethemonitorinputpleasepushthe monitor/set buttonfora
shorttime. Theoriginally selected inputremainsactiveforrecording.
Thisinputcanbechanced duringthemonitorloopisactivated,ofcourse.
Tocomeback to thestandard inputsimply press thedescribed buttona
secondtime.
Your PRE1G2 isprogrammableforfunctionsprovidingyouwithnew
andeasypossibilitiesto adjustthesystemto your needs.All individual
settingswill beremembered,alsowhenPRE1G2 will beswitched off the
mainsortransported.
Youcanprogramthefollowing:
¨ Thebalance canbeadjusted to individualpreferences
¨ Inputs,whichusually havedifferent signallevel, canbeadjusted to the
samevolume
¨ Inputscanbegivenanindividualname.
¨ Thebrightness ofthedisplaycanbeadjusted ("Dim Value")
¨ Automaticstartup canbeswitched onoroff ("Autostart")
¨ Youcanchoosebetweentwo textsbeingdisplayed whileinstand-by
mode ("Off_Text")
The2-linealphanumericdisplaywill giveyouall informationyouneed
aboutyour individualsettings:
§ Number ofselected inputandgivennameofinputornumber ofse-
lected inputandmonitororassigned name
§ Volumeandassigned offset, visualized balance settingaswell
Monitor loop
Programming
Display

8
Theprogrammingignitionsequence isentered pressingthe monitor/set
buttonlonger thanonesecond.
Forprogramming, pleasedothefollowing:
1. Pushthe monitor/set buttononce foratleastonesecond.
2. Nowyouare enabled to adjustthestereobalance ofyour system.
Turningthevolumeknobclockwisedecreasestheleveloftheleft
channel,turningcounter clockwisewill decreasetherightchannel’s
level.Thelevelofeverystereochannelcanbedecreased up to
9 * 1 dB. Thesettingisdisplayed numerically andasymbol.
3. Toleavetheprogrammingmode,pushthe monitor/set ashorttime.
Alternatively youcanproceed adjustingto thenextstep withanother
longkeypress (goonwith(3) inthiscase):
1. Selectthechannelto beadjusted
2. Pushthesetbuttontwice forlonger thanonesecond.Thedisplay
showsyouthechannelnumber and offsetadjust”.
3. Turnthevolumeknobto adjustthedesired channellevel.Thisispos-
siblewithinarange of+/- 9 * 1 dB to themaster volume
4. Toleavetheprogrammingmode,pushthe monitor/set ashorttime.
Alternatively youcanproceed adjustingto thenextstep withanother
longkeypress (goonwith(3) inthiscase):
1. Selectthechannelto begivenanew name
2. Pushthesetbuttontwice forat least onesecond.Thedisplaychanges
to Text”adjustment.
3. Forindividualnamingthere are 14 charactersper inputchanneland12
charactersforthemonitorloopavailable.Acursorindicatesthecur-
rentcharacter to beedited.Turntheinputswitchto movethecursor
intheappropriatedirection.Selectacharacter fromacharacter set
consistingofletter, numbersandsymbolsbyturningthevolumeknob.
4. Toleavetheprogrammingmode,pushthe monitor/set ashorttime.
Alternatively youcanproceed adjustingto thenextstep withanother
longkeypress (goonwith(2) inthiscase):
Balance
Volumeoffset
Nameprogramming

9
1. Pushthesetbuttonfour timesforatleastonesecond.The display
changesto SetDim Value”.
2. Thebrightness canbeadjusted infivesteps:
OFF, 25%, 50%, 80%, 100% (Default brightness is50%!)
3. Toleavetheprogrammingmode,pushthe monitor/set ashorttime.
Alternatively youcanproceed adjustingto thenext step withanother
longkeypress (goonwith(2) inthiscase):
Ifthedisplaybrightness issetto "OFF"thefollowingisstill displayed:
§ mutestate
§ selectinganew input(displayed forapprox. 3seconds)
§ all programming
1. Pushthesetbuttonfivetimesforatleastonesecond.Thedisplay
changesto SetAutostart”.Ifautostart isset to "OFF"thePRE1G2
staysinthestandbymode after switchingonwiththemainsswitch(3)
until thepower buttonispushed. Ifautostartissetto "ON" thePRE 1
G2 startsautomatically into theonmode after switchingonwiththe
mainsswitch(3).Selectthisoptionif youuseatimer to controlthe
PRE 1G2.
2. Selecttheautostartoptionbyturningthevolumeknob.
3. Toleavetheprogrammingmode,pushthemonitor/setashorttime.
Alternatively youcanproceed adjustingto thenextstep withanother
longkeypress (goonwith(2) inthiscase):
1. Pushthesetbuttonsixtimesforatleastonesecond.Thedisplay
changesto SetOff_Text”.
2. Nowyou canchoosethetextto bedisplayed whenyour PRE1G2 is
instand-bymode byturningthevolumeknob.Thepossibletextsare:
"AUDIONET"or"¤¤".
Pushthe set button once again to finishprogramming.
Note:
If no changesaremade for10 seconds, yourPRE1G2 will automati-
callyexit the programming menu.
Set display brightness
Set Autostart
Set Off_Text

10
Using the remote control
All functionsofthePRE1G2 canbeoperated bytheAudionetremote
controlinthesamewayasdescribed forthefrontpanel.
Forsettingthevolumelevel,pleasepush+or - oftheremotecontrolvol-
umebuttonpair.Thebutton mon correspondsto monitor/set button:
pushshortforselectingthemonitorloop;pushlongforselectingthepro-
grammingfunctions.
Usingtheremotecontroltheinputscanbeselected directly.
Additionally, thefollowingfunctionsare possible:
PRE1G2 hasasoftmutefunction.Ifdesired to mutePRE1G2;please
press the mute buttonontheremotecontrol.Whenmuting,PRE1G2
regulatesvolumedownto -80 dB andthenswitchesoff theoutputs.If
youpress themutebuttonagain,PRE1G2 activatestheoutputsandre-
turnsto thevolumebefore
Ifthemainsphaseisconnected incorrectthePRE1G2 will tell youwhile
startingup:
"Attention: Mains phase incorrect!"
Switchoff your PRE1G2 andchange thepositionofthemainsplug at
your wall socket.Ifthemainsphaseisconnected correctly nowarning
will appear inthedisplaywhilestartingup.
Mute
Mains phase recognition

11
Rear view
input
link1outMade
inGermany
by
IDEKTRON
mains
Thisunitmustbeearthed.
AC:230/240V
50/60Hz
outputmonitorrecout
in
26
5
tape
3
24567
(phono)
outout
ext.power
Usededicatedonly.
1
gnd
IdektronGmbH&CoKG,Bochum,Germany:PREI
0I
RearViewAudionetPREIG2
(3)
(2)
(1)
(4)
(9)(5)(7)(6)
(8)

12
Technical information
Thecircuitisconstructed implyingtheshortestpossiblesignalpathsto
ensure besthighfrequencycharacteristics.Thegroundisfocused inone
centre point.All constructionisoptimised incapacityandinductiveman-
ner.
Thesystemissupervised andcontrolled byapowerfulmicroprocessor.
Thedigitalsectionisseparated andshielded fromtheanalogsection.
Thepower supply isprovided bya100 VAtoroidtransformer.Thefilter
capacityisaslarge as40 000 µF.All supply voltagesare cleaned twice,
by pre voltage regulatorsandlocalvoltage regulators.
All amplifiersare optimized usingthemost moderndiscretecircuitry.The
volumeisregulated byaprecisionresistornetwork instead ofasimple
andfaultsusceptiblepotentiometer.
ThePRE1G2 isdrivenbyamicrocontroller system.Informationabout
thecurrentstateisshownbya2*16-character display. Inputnamescanbe
setindividually aswell asthevolumeoffsetofeachinputchannel.There
isaseparatemenuavailableto adjustthebalance.
Overall thePRE1G2 offers6inputs.Youcanconnecttwodifferent
power amplifiersaswell.
Twohighperformance outputsandapowerfulmonitorloopforrecording
andcontrollingpurposesare alsoavailable.
Optionalfeaturesare aIRremotecontrol,phonomodule,24bit D/Acon-
verter andexternalpower supply (AudionetEPS).
Fundamentals
Power-supply
Circuit
Features

13
Technical Data
Function microprocessor controlled preamplifier
Bandwidth
THD
SNR
Crosstalk
stereo
btw. Inputs
source/monitor
volumelinearity
output impedance
output voltage
output current
input voltage
1 - 3,000,000 Hz(±3 dB)
> 105 dB (20 Hzto20 kHz)
> 110 dB for 5 VRMS
>100 dB at 1 kHz
>103 dB at 1 kHz
>100 dB at 1 kHz
typ. 0.03 dB
22 ohms
max. 7 VRMS
max. 30 mA
max. 5 VRMS
Inputs 5 high level RCA inputs(gold plated)
1 balanced XLR input (gold plated)(1: GND, 2: Pos, 3: Neg)
1 RCA monitor input (gold plated)
7 pin plug for Audionet EPS
Outputs 1 lineout RCA output (gold plated)
1 balanced XLR output (gold plated)(1: GND, 2: Pos, 3: Neg)
1 recout RCA output (gold plated)
1 RCA monitor output (gold plated)
1 plug for additional ground connection (gold plated)
1 Audionet Link(optical)
Mains
power consumption
230 V, 50 Hz
7 VA Stand by; max. 30 VA
dimensions
weight
430 mm * 70 mm * 310 mm (w* h * d)
8 kg
finish
optional
front: brushed blackaluminium, whiteprinting
top: blackmicrolized aluminium
front: brushed naturealuminium, printing: black
options remotecontrol, phonoMM/MC preamplifier, 24bit D/A converter,
external power supplyEPS
Subject tomodification

14
Securityadvice
* Avoidpackagingmaterial,especiallyplastic bags, to
comeintochildren’s hands.
* Storeand operatetheunit inadryroomat areason-
able room temperature
* Avoidmoistureor anyliquidtoget intotheunit
* Setuptheunit inafree positionsothat theair is al-
lowedtoflowthroughtheunit slits,
* Donot cover, e.g. witha blanket
* Donotopen thecase.Unauthorizedopeningwill
causeloss of guarantee.
* Usea dryclothfor cleaning
Engineered and produced by:
Idektron GmbH &Co. KG, Herner Str. 299, Geb ude 6, 44809 Bochum
www.audionet.de
[e-mail]