Audionet PRE G2 User manual

audionet
PREG2
ReferencePre-Amplifier
Owner’sManual

2
Howto operate theAudionetPREG2
AudionetsPREG2isahighperformance audiopre-amplifier.This
systemisdesignedforabsolutelynaturalmusicreproduction and for
highestuser comfort.
Thefollowingwill giveyou all information abouthowtooperateyour
PREG2. Pleasereadthiscarefullybefore thefirstuse.Following
theseinstructions, yourPREG2will giveyou long-lastingpleasure
and satisfaction.

3
Connecting the system
Pleaseconnectthepower jack(1)attherear withyourwall outlet
(Pleaserefer topage11).Usetheprovidedpower cableoranother one
allowed foryourhomecountryspecifications.
NOTE:
Thepower specifications(2)ontherearmustmeet toyourhome
country specifications.
Themains-button(3)atrearmustbeswitchedoff.
PREG2isaverysensitivesystem.Pleaseensure thatall usedconnec-
torcables are in absolutelybestcondition.
Forconnectingorremovingaudiosources, PREG2has to beswitched
off (stand-bystate) orshould bemuted.
PREG2hasonebalancedand fiveunbalancedhighlevelinputs(4).
Duetothedualmono construction, leftand rightinputsare separated
attherear.Pleaseconnectleftand rightinputstothecorresponding
outputsofthedesignatedhigh-levelsources, likeCD-player,D/A-
converter,…
PREG2hastwobalancedaswell asonelineand oneinvertedunbal-
anced outputs (5)forconnectingpower-amplifiers.
Pleaseconnectleftand rightchanneltothecorrespondinginputsof
yourpower-amplifier.Ifbi-ampingisdesired, pleaseusethetwobal-
ancedorthelineand theinvertedoutputs. Inthesecond case,you
havetochangetheloudspeaker polarityoftheoneamplifier,thatis
connectedtotheinvertedPREG2-outputs(changeplus tominus and
minus to plus). Ifyou are notsure, yourdealer will help you.
Powersupply
Audiosources
Inputs
Outputs

To preventanynegativeinfluence on thesignal,PREG2hasno regular
tapemonitorloop orarec outselector.
Forrecordingpleaseconnecttheinputsofyourrecordingsystem,like
DATortape-deckwiththemonitoroutputs(6)ofPREG2. Whenthe
recorder isconnectedtothemonitoroutputs, forplayingbackyou must
useinputs No. 6 ofthePRE G2.
WheninputNo. 6isselectedand active,themonitoroutputsare always
switchedoff.Thisisnecessarytopreventdestructiveoscillation ofPRE
G2and recorder.Therefore InputNo. 6cannotbeusedforasignal
source, which should berecorded.
WheninputsNo. 1to5are selected, themonitoroutputsare alwayson.
You are free tousetheseinputsforplayback, whentherecorder isnot
connectedtothemonitoroutputsortherecorder inputsare connected
elsewhere.
Incombination withother AudionetproductsthePREG2canswitchon
and off thewholesystem.PleaseconnecttheAudionetlink (7)on the
rear withaToslink opticalfibre cabletotheAudionetlink ofother
Audionetproducts.
Recording systems
Audionet-link

5
Switching on and off the mains
PREG2isdesignedasastand-byunit.To bringPREG2intothestand-
bystate,pleasepress themains power switch(4)on therear.PREG2
will bein thestand-bystatedisplaying"Audionet".
To switchoff themains isonlynecessaryincasesoflonger absence like
holidays. Forswitchingoff pleasepress againthemains power switchon
therear.Lookingfromabove,theswitchnowshowsyou a"0"and the
displayturns off.
Operating the system
All functions ofthePREG2are completelymicroprocessorcontrolled.
Thisguarantees highestprecision, exclusivefunctions, easyoperation and
protection againstoperationalfaults.
ForswitchingPREG2on, pleasepress the power button atthefront
panel.PREG2needs 5sec.forwakingup and thenworks. PREG2will
comeup softly.
To switchthePREG2off,pleasepress thepower button againand the
PREG2needs 5sec.forgoingtosleepand thenwill remember all your
latestsettings.
Whenswitchingon and off atthefrontpanelorwiththeremotecontrol
you do nothaveto care aboutyourother systems.
Switching on and off inthe
stand bystate

6
To setthedesiredvolume,pleaseturnthemagneticbuffered volume
knob atthefrontpanel.Thisisanincrementalimpulseunit withouta
stop.
Pleaseturnclockwiseifhigher and counter clockwiseiflower volumeis
desired.
PREG2showsyou themaster volumewitharangefrom-80 dBto
+10 dBinthedisplay.Thisare real1 dB-steps relativelytotheinputsig-
nal. To adjustthevolume-offset, pleaseread „programming“(page7).
PREG2hasasoftinputselectfunction. Pleasepress the input button at
thefrontpaneltoselectoneofthesix inputsbyturningthe volume knob.
Whenchangingtheinput,PREG2regulatesvolumedownto-80 dB,
mutestheoutputs, switchestheinputs, activatestheoutputsand finally
regulates volumeup to thelevelbefore.
PREG2hasasoftmutefunction. Ifdesiredornecessarytomutethesig-
nal, pleasepress the mute button atthefrontpanel.
Whenmuting,PREregulatesvolumedownto-80 dBand thenswitches
off theoutputs. Ifyou press themutebutton again, PREactivatestheout-
puts and regulates thevolumeup to thelevelbefore.
Ifyou changetheinputsinthemutedstate,pleasepress themutebutton
againasbefore.Inthiscasethevolumelevelwill stayat-80 dB.Now
you havetosetthevolumewiththevolumeknob. Thisisprovidedto
protectyou fromunexpectedlevelsofsignal-sources, whichmaybe
much louder as theonebefore.
Setting thevolumelevel
Selecting theinputs
Muting

7
Programming
PREG2isprogrammableforfunctions providingyou withnewand easy
possibilitiestoadjustthesystemtoyourneeds. All individualsettings
will beremembered, also when PRE G2 will beswitched off themains.
You can programmethefollowing:
§Thebalance can beadjusted dueto individualconditions
§Inputs, whichusuallyhavedifferentsignallevel,canbeadjustedto
thesamevolume
§Inputscanbegivenanindividualname,e.g."CD1","CD2","Dar-
ling"etc.
Thetwolinealphanumericdisplaywill giveyou all information you need
aboutsettings:
§Firstline:channel, given nameofthechannel
§Second line:master volumelevel, programmed volumeleveloffset
Forselectingthefunction, whichshouldbeprogrammed, pleasepress the
set button atthefrontpanel.
Display

8
Forprogramming, pleasedo thefollowing:
1. Push thesetbutton once forashorttime.
2. Turningthevolumeknob clockwisedecreasestheleveloftheleft
channel,turningcounter clockwisewill decreasetherightchannel’s
level.
Thelevelofeverychannelcanbedecreasedup to9 dB.Thesettingis
displayed numericallyand byarrows.
3. Push thesetbutton fivetimes to leavetheprogrammingmenu oronce
for‘volumeoffset’and continuewith step 3 ofthefollowing
1. Selectthechannelto beadjusted
2. Push thesetbutton twice forashorttime.Thedisplayshowsyou a
flashingcharacter on thedisplayat"programmed leveloffset"
3. Turnthevolumeknob toadjustthedesiredlevel.Thisispossible
within arangeof+/-6 dBto themaster volume
4. Push thesetbutton fourtimestoexit oronce for‘nameprogram-
ming’and proceed with step 3 ofthefollowing
1. Selectthechannelto begiven anewname
2. Push thesetbutton three shorttimes. You will see acursorunder the
firstcharacter ofthename
3. Turnthevolumeknob and setthefirstcharacter,number orsign,
which is required forname
4. Push themutebutton once.Thedisplaynowshowsthecursorunder
thesecond character
5. Turnthevolumeknob asdescribedinstep3...and so on. All inall
you can set10 characters
6. Push thesetbutton three timestoexit oronce forchangingthe‘input
sequence’. Ifso, proceed with step 3 ofthefollowing.
Balance
Volumeoffset
Nameprogramming

9
1. Selectthechannel, in which theDCServo has gotto beactive.
2. Push thesetbutton fourshorttimes
3. Turnthevolumeknob totherighttoactivateand tothelefttodeacti-
vatetheDCServo.
4. Push thesetbutton twice toexit.IftheDCServo isactiveon thecur-
rentinputyou will see asmall star attheupper rightcorner ofthe
display.
1. Push thesetbutton fiveshorttimes
2. Turnthevolumeknob toselectstand-bytextbetween“AUDIONET”
and “¤¤”.
Thechosen textwill bedisplayed when thePRE G2 is in stand-bymode.
Note:
Ifnochangesare madeforabout10 seconds, thePREG2will auto-
matically exittheprogramming menu.
Thedisplaycanshowyou itsinformation withfivestatesofbrightness:
from100%tooff infivesteps. To setthispleasepush theset-button for
longer thantwoseconds and thenyou canadjustthebrightness withthe
volumeknob.
Nevertheless, in thedisplayoff-statethefollowingis shown
§themute-state
§changingtheinputs (forafew seconds)
§all programmingworks
WARNING:
Longtermusageofthedisplaysettomaximumbrightness (setting
100%) maycauseextendedsigns ofwear resultinginadecayofcontrast
orbrightness ofindividualdotsinthedisplay.Donotusethedisplay
withabrightness sethigher thanthefactorydefault settingof50%over a
longer period oftime
DC Servo
Choose stand-bytext
Dimming thedisplay

10
Using the remote control
All functions ofthePREG2canbeoperatedbyAudionetsremotecon-
trolin thesamewayas described forthefrontpanel.
Pleasepush thecorrespondingbuttons oftheremotecontrolunit.Using
theremotecontroltheinputscanbedirectlyselected. Forsettingthevol-
umelevel, pleasepush +or-oftheremotecontrolvolumebutton pair.
Additional Ground
Inaddition totheAudionetPower Cordyou will find inthepackingthere
isagreen/yellowground cordforadditionalgroundingthepreamplifier.
Thiscordshouldbescrewedtighttothegoldplatedground socketatthe
back ofthePRE G2 and then plugged in thewall outlet.
Wehardlyrecommend theuseoftheadditionalground cordbecauseof
thepositiveinfluence to thesound ofthewholesignalchain.

11
Rearview

12
Precautions
§Avoidpackaging material,especiallyplastic bags,
tocomeintochildren’shands.
§Storeand operate theunit inadryroomat areason-
able roomtemperature
§Avoidmoistureor anyliquidtoget intotheunit
§Set up theunit inafree position sothat theairisal-
lowedtoflowthrough theunit slits,
§Donot cover, e.g. withablanket
§Donotopen thecase.Unauthorisedopening will
causeloss ofguarantee.
§Useadryclothfor cleaning

13
Technical Data
Funktion microprocessorcontrolledpreamplifiersystem
Frequencyresponse
THD
SNR
Input impedance
Output impedance
Output current
0-2.000.000 Hz(-3dB)
2-2.000.000 Hz(-3dB)with DC-Servo
> 107 dB from20 Hzto20 kHz
> 116 dB at 1kHz
> 108 dB at 2Veff
47 kOhm, 22pF
22 Ohm
max60 mA
Inputs 5RCAin(goldplated)
1Balancedin(Neutrik XLR)(1:GND, 2:Pos, 3:Neg)
Outputs 1RCAout (goldplated)
1RCAout inverted(goldplated)
2Balancedout (Neutrik XLR)(1:GND, 2:Pos, 3:Neg)
1RCAout monitor(goldplated)
Powersupply
Powerconsumption
230 V, 50 Hz
5VAStand by
max70 VA
Dimensions
Weight
430 mm *125 mm *420 mm (w*d*h)
18kg
Top
Chassis
Front
brushedaluminium, available inblack
steel, blackcoated
brushedaluminium, available inblackorsilver
Subject tomodification
Engineered and produced by:
Idektron GmbH&Co. KG, HernerStr. 299, Gebäude 6, 44809 Bochum
www.audionet.de
[e-mail]