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Audionet PREI G3, User Manual

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Audionet PREI G3 User Manual Download Page 42

42

 

10  Technical information 

 

10.1  Design 

With  circuits  consequently  designed  using  SMD  miniature  technology 
and shortening all signal paths to a minimum the high frequency charac-
teristics  were  optimized.  Ground  pathways  run  in  a  star-shaped  pattern 
converging  in  one  central  location.  The  circuit  design  is  optimized  ca-
pacitively  and  inductively.  A  powerful  microprocessor  controls  and 
monitors the system. The analog section and control unit are galvanically 
separated by opto-couplers, the digital section also spatially separated. 

 

10.2  Power supply 

A  50 VA  toroid  transformer  powers  high-current  capacitors  with  a  total 
capacity of 20,000 

μ

F. Two fast, discrete pre-regulators smooth and stabi-

lize the supply voltages. Additionally the voltages for the input and out-
put stage each are smoothed locally by two discrete and ultra-fast regula-
tors. The digital section has a separate power supply. 

 

10.3  Circuitry 

All operational amplifiers optimized and embedded in a discrete circuitry. 
The  driver  stage  operates  distortion-free  in  symmetric  class  A  mode. 
Gold-coated precision relays switch the input signal and ground. Volume 
and balance is controlled, free of any electro-mechanical component, via 
precision resistor networks that are switched electronically and linearized 
in real-time. The resolution of the volume control circuit is 1 dB. 

 

10.4  Handling 

A  microprocessor  controls  and  monitors  all  functions.  A  two  line,  16-
digit  display  informs  the  user  about  all  operating  modes  and  makes  it 
easy to adjust the PRE1 G3 to the user's preferences. The unit also fea-
tures  user-definable  channel  names  and  input  level  adjustment  for  each 
channel.  Two  'Audionet  Link'  outputs  facilitate  easy  daisy-chaining  of 
Audionet devices for remote switching on/off via 'Audionet Link'. Each 
input channel features a user selectable DC Servo to eliminate DC com-
ponents on source signals. Furthermore a monitor loop for an additional 
recorder, decoder etc. is present. 

 

The PRE1 G3 can be equipped with the Audionet system remote control 

Harmony One

, a phono module for MM- and MC-systems, and an exter-

nal power supply, the EPS. 

Summary of Contents for PREI G3

Page 1: ...1 Stereo Pre Amplifier User s Manual ...

Page 2: ...2 ...

Page 3: ...ction 10 5 Inputs and outputs 11 5 1 Inputs 11 5 2 Outputs 11 5 3 Recording devices 12 5 4 Monitor 12 5 5 Phono 12 5 6 Audionet Link 13 5 7 External power supply EPS 13 5 8 Trigger output 14 6 Usage 15 6 1 Powering up 15 6 2 Switching on and off 15 6 3 Mains phase detection 16 6 4 Using Audionet Link 16 6 5 Control elements on the front panel 17 6 6 Volume control 17 6 7 Display 18 6 8 Input selec...

Page 4: ... 31 7 10 Set Autostart 32 7 11 SetChannelforBy PassMode 32 7 12 Overview factory defaults 33 8 Audionet System Remote Control 34 8 1 Key assignment PRE1 G3 36 8 2 Screen 1 37 8 3 Screen 2 38 8 4 Screen 3 39 9 Special function By Pass Mode 40 10 Technical information 42 10 1 Design 42 10 2 Power supply 42 10 3 Circuitry 42 10 4 Handling 42 11 Security advice 43 12 Technical data 44 ...

Page 5: ...ngratulates you on your purchase of this unit But before you start listening to your new Audionet PRE1 G3 please read this manual carefully so you are able to use and enjoy all functions of this unit without drawback on music quality ...

Page 6: ...ns cord one green yellow cord for an additional earth connection 1 2 Transport Important Please transport the PRE1 G3 only in the included package Always use the plastic bag to prevent scratches on the casing Please allow the PRE1 G3 to adapt to the climatic conditions in your listening room before you switch on the unit for the first time after transport ...

Page 7: ...7 2 Overview front panel Display power key down key IR remote control receiver up key set down power up set key PRE 1 G3 Stereo Preamplifier ...

Page 8: ...C OUT left right 10 Earth connector for turn table phono 11 Cinch input no 6 left right 12 Cinch input no 5 left right 13 Cinch input no 4 left right 14 Cinch input no 3 left right 15 Cinch input no 2 left right 1 11 16 7 6 5 4 3 2 12 13 18 14 15 17 10 19 9 8 22 21 20 16 Balanced XLR input no 1 left right 17 Monitor input left right 18 Audionet Link output OUT 1 19 Audionet Link output OUT 2 20 5 ...

Page 9: ...iators Do not place the PRE1 on top of other units especially not on top of power amplifiers pre amplifiers or similar that produce heat Both units could suffer damage from thermal overload Do not use the unit in places where it is exposed to vibrations Do not place the unit close to loudspeakers or into the corner of a room where it is exposed to high levels of sonic energy which might reduce the...

Page 10: ...he correct polarization of mains is important for reasons of audio clarity and stability Please connect the mains cord so that the hot pin of the wall outlet is connected to the pin of the mains input 22 marked phase 21 Your Audionet PRE1 G3 is able to detect a wrong polarization of the mains plug during start up If the message Attention Mains Phase incorrect appears in the display switch off the ...

Page 11: ...d on the back panel of the PRE1 G3 to the corresponding output of the source you would like to connect to the PRE1 G3 5 2 Outputs The PRE1 G3 is equipped with two Cinch outputs OUT 1 6 and OUT 2 7 as well as one balanced XLR output XLR OUT LEFT and XLR OUT RIGHT 5 for the left and right channel to connect the unit to your amplifier s Use the Cinch output OUT 1 6 to connect the PRE1 G3 to your powe...

Page 12: ...es you like to record from With these inputs the recording output REC OUT 9 is always active 5 4 Monitor The monitor loop of the PRE1 G3 makes it possible to insert a recording device for read after write verify or an effects processor e g surround decoders into the signal path Connect monitor output MONITOR OUT 8 of the PRE1 G3 to the in put of the unit you would like to insert Also connect the o...

Page 13: ...connect power amplifiers to the PRE1 G3 via Audionet Link Connect units you would like to control independently from the headphones settings e g tuner CD player etc to Audionet Link output OUT 1 18 Tip Audionet source units and power amplifiers are usually equipped not only with an Audionet Link input but additionally with an Audionet Link output to connect further Audionet devices to be controlle...

Page 14: ...Never switch on or off the EPS on its back panel while the PRE1 G3 is operating For further information referring to the external power supply EPS please consult its user s manual Tip Use a high quality cable for example the Audionet APC to connect the EPS to mains The sound will improve 5 8 Trigger output Use trigger output TRIGGER 3 to control e g switch on off non Audionet devices If you switch...

Page 15: ...y mode operate mains switch 1 on the back panel The display will go dark To disconnect the PRE1 G3 from mains completely you have to pull the mains cord off the mains jack 22 Important Before you switch off the PRE1 G3 from mains power down and discharge completely all units connected to the outputs of the PRE1 G3 6 2 Switching on and off To power up the PRE1 G3 from stand by mode press the power ...

Page 16: ...If the PRE1 G3 issues the mains polarization warning or no warning at all for both positions of the mains plug check the connection to earth of your mains socket and mains cord You have to ensure a stable connection to earth for the mains phase detection of the PRE1 G3 to work correctly 6 4 Using Audionet Link Your PRE1 G3 is equipped with two Audionet Link outputs OUT 1 18 and OUT 2 19 allowing y...

Page 17: ... an option of the setup menu see section Setup menu on page 21 up Push key to increase volume select next input channel see section Input selection on page 19 or change an option of the setup menu see section Setup menu on page 21 6 6 Volume control While the PRE1 G3 is in normal operating mode use keys up and down on the front panel to adjust the volume up increases down decreases the volume The ...

Page 18: ... on page 17 4 offset for input level of currently selected input channel see section Offset Adjust on page 28 As soon as you enter the setup menu by pushing the set key the display changes to show information related to the selected menu item For fur ther display details refer to the description of each menu item in section Setup menu starting from page 21 Note After 10 minutes without any user in...

Page 19: ...nger than 2 seconds Using the Audionet System Remote Control Harmony One select an input channel by simply pressing the corresponding key see section Screen 1 on page 37 or use the keys Ch and Ch to switch to the next or previous input channel without using the Select Input function 6 9 Muting Note The muting function is only available through the Audionet System Remote Control Harmony One Press k...

Page 20: ...el as described above But the PRE1 G3 will stay muted until you press the key again to un mute and restore the original volume level If you turn up the volume by using the key up or Vol while the PRE1 G3 is muted the muting function will be deactivated and the new volume level set ...

Page 21: ...eave the setup menu automatically Of course you may leave the setup menu from each menu item by holding the set key down for longer than two seconds The PRE1 G3 will return to the normal operating mode The order of items in the setup menu is ê 1 SELECT INPUT ê SET MONITOR ê SET HEADPHONES ê SET DIM LEVEL ê BALANCE ADJ ê OFFSET ADJUST ê SET DC SERVO ê Channel name ê SET OUT 2 SUB ê SET AUTOSTART ê ...

Page 22: ...play brightness is set to 100 for better readability After leaving the setup menu the display brightness is automatically reset to its user selected level If you power down the PRE1 G3 to stand by mode all settings are stored automatically in the non volatile memory of the unit Even af ter disconnecting from mains the PRE1 G3 will still remember your settings In the following all options of the se...

Page 23: ... active In normal operating mode the symbol M at the end of the 1st display line indicates an active monitor loop Also the input channel name is now replaced by the user definable name of the monitor loop 1 currently selected input channel 2 user definable name for the monitor loop 3 indicator for active monitor loop Note If the monitor loop is active the current input channel stays selected But t...

Page 24: ...on off with the PRE1 G3 switching on off HP on Link on Headphones output HEADPHONES 4 is ac tive The Audionet Link output OUT 2 19 is also active as long the unit is switched on Use this option if you connect devices to the Audionet Link output OUT 2 19 that are supposed to be controlled via Audionet Link independently from the headphones setting HP on Link off Headphones output HEADPHONES 4 is ac...

Page 25: ...ower amplifier to the Audionet Link output OUT 2 19 of the PRE1 G3 it will be switched off automatically as soon as you select the headphones option HP on Link off Thus you are able to enjoy music with your headphones and need not to worry about the amplifier In case you deactivate the headphones output by selecting the option HP off Link on the power amplifier is switched on automati cally via Au...

Page 26: ...the number of the selected input channel and current volume level in the form of In 4 47dB The display brightness is always reduced to 25 and the location of the information text will change randomly every 12 seconds to prevent any burn in effect of the display The display saver is de activated and the display returns to its nor mal mode as soon as any user entry is detected The user cannot switch...

Page 27: ...ore symbols The orientation of the symbol represents the direction of the balance shift the number of symbols equals the amount of 1 dB steps the balance was shifted Example balance shifted to the right by 3 dB balance shifted to the left by 5 dB no balance shift Note In normal operating mode the PRE1 G3 indicates a balance shift by the corresponding symbol in the 2nd line of the display Thus you ...

Page 28: ...p To adjust the offset of the monitor loop you first have to activate the loop see section Set Monitor on page 23 Now you adjust the offset as described above for the offset of the input channels If you would like to adjust the input level offset for just another input channel please use the keys Ch and Ch of the Audionet Sys tem Remote Control to switch to the desired channel The PRE1 G3 does not...

Page 29: ...e to set the DC Servo option for more than just the current input channel please use keys Ch and Ch of the Audio net System Remote Control to select the desired input channel The PRE1 G3 does not leave the setup menu and you are able to adjust the DC Servo option for each input channel very easily 7 8 Channel name You can assign a fully user definable name up to 14 characters in length to each of ...

Page 30: ...op even if you use the keys Ch and Ch of the Audionet System Remote Control to change the input channel You have to deactivate the monitor loop first before you are able to edit the input channel names again Tip If you would like to edit the channel name for more than just the cur rently selected input channel use keys Ch and Ch of the Audionet System Remote Control to switch to the desired input ...

Page 31: ...rs the same signal as output OUT 1 6 Subwoofer The mono sum signal of channels left and right is output on both jacks of output OUT 2 7 for driving a subwoofer Note In mode Subwoofer the mono sum signal is composed by the for mula Left Right Tip If your subwoofer offers only one cinch input jack select mode Sub woofer in the menu Set Sub Out and connect one of the jacks of output OUT 2 7 to the in...

Page 32: ...ol Harmony One to switch on the unit into normal operating mode active The Autostart function is active As soon as you connect the PRE1 G3 to mains i e use the mains switch 1 on the back panel the unit starts up automatically to normal operating mode Use this setting for timer controlled op erations 7 11 Set Channel for By Pass Mode Push the set key eleven times for less than two seconds to enter ...

Page 33: ...3 issues the warning No input for By Pass selected For safety reasons the factory default settings have no input channel selected for By Pass Mode display SET CHANNEL FOR BY PASS MODE 7 12Overview factory defaults Option Setting SELECT INPUT INPUT TWO SET MONITOR disabled SET HEADPHONES HP off Link on SET DIM LEVEL 50 BALANCE ADJ OFFSET ADJUST 0 dB for all input channels SET DC SERVO In 1 5 disabl...

Page 34: ...Activities For detailed infor mation on how to customize and use Activities on your Harmony One please consult the separate user s manual that came with your Harmony One 1 Power key for use with Activities turns all devices off that are in cluded into the current Activity See separate user s manual of Har mony One 2 Depending on the operational mode the touch screen of the Har mony One shows a lis...

Page 35: ...ed below to control the PRE1 G3 refer to the factory default programming of the Audionet System Remote Control Harmony One Understandably any changes done to this setup by the user cannot be discussed here Tip In order to switch the PRE1 G3 on off without using an Activity please use the keys Power On Power Off or PowerToggle on screen 3 see section Screen 3 on page 39 Of course it is possi ble to...

Page 36: ...2 see section Screen 2 in page 38 2 Vol increases the volume of the PRE1 G3 also for selecting se tup options or input channels This key has the same function as key up on the front panel 3 Ch switches to the next input channel see section Input selec tion on page 19 6 3 Balanced Input PRE1 G3 1 3 pages Devices Mi 14 51 Current Activity Input Three Input Four Tape Input Phono Input 1 2 5 4 7 Input...

Page 37: ...n Muting on page 19 7 Digit keys for direct input selection see section Input selection on page 19 8 2 Screen 1 1 Directly selects input channel no 1 2 Directly selects input channel no 2 3 Directly selects input channel no 3 4 Directly selects input channel no 4 5 Directly selects input channel no 5 6 Directly selects input channel no 6 Input Two PRE1 G3 1 3 pages Devices Mi 14 51 Current Activit...

Page 38: ...al function By Pass Mode 3 Dim Display jumps directly to the setup menu item Set Dim Level see section Set Dim Level on page 25 4 Use Set to navigate through the setup menus This key has the same function as the set key on the front panel see section Setup menu on page 21 or key Menu of the Harmony One see section Key assignment PRE1 G3 on page 36 Monitor PRE1 G3 2 3 pages Devices Mi 14 51 Current...

Page 39: ... as the power key onthe front panel If the PRE1 G3 is in stand by mode Power Toggle switches on the unit If the PRE1 G3 is already switched on Power Toggle swit ches off the unit to stand by mode 3 If the PRE1 G3 is witched on use key Power Off to switch the unit off to stand by mode Power On PRE1 G3 3 3 pages Devices Mi 14 51 Current Activity Power Toggle Power Off 3 2 1 ...

Page 40: ...ality 2 channel analog sources to the remain ing inputs of the PRE1 G3 6 Connect your DVD player to your home cinema pre amplifier as usual Use the PRE1 G3 to listen to high quality analog sources If you would like to use your home cinema system activate the By Pass Mode of the PRE1 G3 and use your home cinema pre amplifier as usual Important The activate the By Pass Mode you need a Audionet Syste...

Page 41: ...d through to the outputs at full level As soon as the By Pass Mode is activated the PRE1 G3 will ignore all control commands coming from the keys on the front panel or remote control exceptions see below Important There are only two possibilities to disable the By Pass Mode 1 Press key By Pass Mode of the Audionet System Remote Con trol The PRE1 G3 switches back to the input channel selected be fo...

Page 42: ...nd embedded in a discrete circuitry The driver stage operates distortion free in symmetric class A mode Gold coated precision relays switch the input signal and ground Volume and balance is controlled free of any electro mechanical component via precision resistor networks that are switched electronically and linearized in real time The resolution of the volume control circuit is 1 dB 10 4 Handlin...

Page 43: ...ot cover the unit Do not open the unit Unauthorised opening will void warranty Do not short circuit the outputs During connecting or removing the PRE1 G3 to from sources and or power amplifiers all units have to be switched off to prevent damage of the PRE1 G3 or any of the other connected units Use dry cloth for cleaning We would like to wish you many exciting listening experiences with your new ...

Page 44: ...ut impedance line input 82 kOhms real XLR balanced input 15 kOhms real Input voltage max 5 VRMS Outputs 1 pair Cinch line gold plated 1 pair XLR balanced gold plated 1 pair Cinch Rec Out gold plated 1 pair Cinch Monitor gold plated 2 Audionet Link optical 1 connector gold plated for additional earth connection 1 trigger output 12 Volts DC 3 5mm telephone jack Output impedance line and balanced out...

Page 45: ...ctable AC coupling via DC servo separate level adjustment for each input channel By Pass function e g for integration into home cin ema systems Auto start function for timer operations Audionet Link outputs for remote control of other Audionet components e g power amplifiers selectable headphones output Options Audionet System Remote Control Harmony One Phono module for MM and MC pickups external ...

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