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User Manual - CH Precision

1. a 27 42 3 Mont cesa ae a a 29 0 D ON 31 4 3 1 Al configuration menu items 33 4 3 1 1 AUDIO 33 13 1 2 DISPLAY 34 23 ARE L EAU sat est PER n PR ove eae alto aston ee 35 4 3 1 4 FACTORY SEATING 36 43 1 3 INSTALLED OPTIONS ee anaana 36 37 4 4 Returning to Factory AUTOUR ns a nom ea a dau 37 TR ae 38 5 1 Introduction uen 38 5 2 Firmware Update procedure 38 5 2 1 Preparing the firmware image 38 5 2 2 Updating the firmware Firmware Update procedure 0 39 5 2 3 Emergency Firmware Update procedure 39 41 7 47 SE D nn 47 FP ETERNI e 43 Ta NN NU 43 Rev 1 2 Al User Manual 7 CH 1 Technical Highlights CH products are proudly designed and manufactured in Switzerland by CH Precision Sarl Our engineers have put all their know how into bringing you the Al a top performances future proof modular two output channels power amplifier with USB flash drive firmware update and Ethernet control capabilities As all CH Precision products the Al is highly versatile a single Al can be used as a stereo power amplifier with two mono input boards or a pair of Al can be used as mono power amplifiers Even in monaural mode 4 setups are possible left right mono mode the t
2. 11 12 16 15 14 13 12 1 10 Al main components 8 Al User Manual Rev 1 2 CH 1 2 3 4 3 6 7 8 9 Output coil for HF immunity Argento Audio speaker terminals Monaural analog input boards each Al can be equipped with 1 or 2 such boards Mains switch and power cord receptacle USB firmware update and RJ 45 control board Adjustment shafts and screws Power supply regulation boards Overheat regulation fans Heatsink mounted monaural amplifier boards 10 User interface buttons 11 Rectifying diode bridges mounted onto the front panel 12 Custom Mundorf rectifying capacitors 13 Main analog ground oxygen free copper plate 14 AMOLED display on front panel 15 Standby power transformer ensures green mode Standby 16 Main power transformer Unmatched flexibility The Al offers unmatched system integration flexibility Not only does it provide multiple modes of operation stereo mono bridged and active or passive bi amp but is also provides adjustments to match speaker impedance and sensitivity through feedback and gain controls Operating modes can be selected by the user from the Al s front panel In addition multiple Als can be daisy chained for ultimate performance in multi amplification systems 1 1 1 Operation modes The Al integrates two power amplification channels and provides the option to support a single or dual input boards In its default configurat
3. button push saves the new Parameter Value and gets back to the parent level save and exit On the other hand a CANCEL button push gets back to the parent menu in the case of this example AUDIO SETTING but possible modifications of the Parameter Value are discarded exit without saving 30 Al User Manual Rev 1 2 CH 1 Y AUDIO SETTING gt gt AMPLIFIER MODE Stereo Mono Active Bi omp 4 gt AMPLIFIER Mono Passive Bi amp lt Mono Bridged Q 3 AUDIO SETTING gt gt AMPLIFIER MMODE menu display elements 1 Menu title AUDIO SETTING gt gt AMPLIFIER MODE shows that the parent menu is AUDIO SETTING To access the parent menu push the CANCEL e button 2 The current Parameter Value is highlighted Push the UP a or DOWN v buttons to navigate through Parameter Values 3 Other possible Parameter Value s Number of other possible Parameter Value s depends on Parameter 4 Parameter for which the Parameter Value can be modified in the current menu screen The following section gives detailed information about the menu structure and the various Parameters Note that certain Parameters may or may not appear in the menu depending on installed options For instance if only a single ANALOG_IN board is installed or an amplifier mode requiring two input boards is selected CHANNEL selection menu items to select the left or right input board will be hidden 4 3
4. 1 2 3 4 qm Y Al SETUP gt gt AUDIO SETTING GLOBAL FEEDBACK 20 AMPLIFIER MODE Mono bridged GAIN 0 dB 4 3 2 Al SETUP gt gt AUDIO SETTING menu display elements Menu title SETUP gt gt AUDIO SETTING shows that the parent menu is Al SETUP By pushing the CANCEL ss button the unit returns to the parent menu This is the Parameter Value column For each item in the Parameter column the Parameter Value item on the same line indicates the current value of the Parameter This is the Parameter column The currently active Parameter is highlighted Use the UP 4 and DOWN v buttons to navigate from Parameter to Parameter and the button to enter the edition mode of that parameter If the first or last item in the Parameter column is indicated by it means that there are additional Parameters not displayed currently on screen Use the UP A and DOWN v buttons to navigate towards the to make the corresponding Parameters appear on screen Once a terminal Parameter e g a Parameter not giving access to a further sub menu is selected by pushing the OK button the Al displays the corresponding Parameter adjustment screen Following example shows the AUDIO SETTING gt gt AMPLIFIER MODE Parameter adjustment screen Other Parameters are similar but may show more or less choices for the Parameter value Once a Parameter is set to the desired value an OK
5. a o oe E he 5 Passive bi amp mode 3 4 5 Adive bi amplification mode A pair of Als each with two analog input boards installed can be used in active bi amplification mode In such a case each output board of each Al feeds the speaker s drivers of a given frequency range This configuration is optimal when an active crossover network is used Optimal global local feedback ratio can be set for the different frequency bands The picture below shows how they should be connected in this case 22 Al User Manual Rev 1 2 CH D A Controller 10 9 85 Qa 4 L u tu Balanced XLR cables Right Channel Active Filler Left Channel Active Filler P p 24 5 1 a Al Right Power Amplifier AI Left Power Amplifier Right Speaker Binding Post Left Speaker Binding Post Active bi amp mode 3 4 6 Chained mode When more than one Al is fo be used to drive a single speaker they can be chained This allows for ultimate configuration taking advantage of the increased power available in bridged mode and the flexibility provided by multi amplification optimal feedback ratio setting for each frequency band The picture below shows an example of such
6. lt lt indicate the software version number Make sure all three files are present at the root of your USB stick Any missing file will prevent correct operation of the firmware update procedure 38 Al User Manual Rev 1 2 CH 5 2 2 Updating the firmware Firmware Update procedure Once the USB stick is ready with the appropriate files the effective firmware update can be engaged To do so follow the steps of the following Software Update procedure l 2 Connect the USB stick to the A shaped USB port of the CONTROL board at the rear of your Al unit Turn the unit on if it is in standby or powered off Navigate to the Al_SETUP gt gt FACTORY_SETTING menu and select the UPDATE_FIRMWARE item Start the Firmware Update process by pushing the OK e button Once the Firmware Update is done the unit automatically goes into Standby Please note that the unit will perform a quick Reset display turning off and back on during this procedure Remove the USB stick and wake the unit from Standby The new firmware should now he active To verify that the Firmware Update was effective navigate to the Al_SETUP gt gt FACTORY_SETTING menu and select the FIRMWARE_VERSION item Check that the displayed firmware version number matches the version number of the firmware update image Note The Firmware Update process lasts several minutes about 5 minutes do NOT interrupt it When performing a Firmware Update do NOT interact with
7. Configuration Configuration of your Al amplifier is accomplished by setting parameters in the Menu mode see previous section for how to access Menu mode and how to navigate menu items Following diagram shows the complete menu structure terminal items not shown Grayed menu items are items which depend on installed optional slot in boards Rev 1 2 Al User Manual 3l CH Status mode BI AMP Shortcut mode somari somam SORUN a AI SETUP gt gt AUDIO SETTING gt gt Menu mode pe AISEUP h B GLOBAL FEEDBACK AUDIO SETTING gt gt B GLOBAL FEEDBACK L SETUP gt gt SHORTCUTS gt gt p AUDIO SETTING gt gt SHORTCUTS SHORTCUT PH GLOBAL FEEDBACK R SHORTCUTS gt gt LD AUDIO SETTING gt gt SHORTCUT 2 gt INPUT SHORTCUTS gt gt gt AUDIO SETTING gt gt SHORTCUT 3 NODE SHORTCUTS gt gt AUDIO SETTING gt gt SHORTCUT 4 gt GAIN SHORTCUTS gt gt LD AUDIO SETTING gt gt SHORTCUT 5 GAIN L L SHORTCUTS gt gt AUDIO SETTING gt gt SHORTCUT 6 GAINR AUDIO SETTING gt gt D ce AI SETUP gt gt DISPLAY SETTING gt gt DISPLAY SETTING h DISPLAY MODE Lp DISPLAY SETTING gt gt EDIT CUSTOM gt gt gt Al SETUP gt gt FACTORY SETTING gt gt LED ON OFF FACTORY SETTING FIRMWARE VERSION E DISPLAY SETTING gt gt EDIT CUSTOM gt gt D FACTORY SETTIN
8. Rev 1 2 Al User Manual 39 CH up the unit by pushing the STANDBY button The unit should now start up properly with the new Firmware 6 To verify that the Emergency Firmware Update was effective navigate to the Al_ SETUP gt gt FACTORY_SETTING menu and select the FIRMWARE_VERSION item Check that the displayed firmware version number matches the version number of the firmware update used for the Emergency Firmware Update procedure Note The Emergency Firmware Update process lasts several minutes do NOT interrupt it If the Emergency Software Update procedure fails try to download the latest software images from www ch precision com and rerun the Emergency Software Update procedure don t forget to prepare the software update files and USB stick accordingly If failure persists contact your authorized dealer 40 Al User Manual Rev 1 2 CH 6 Troubleshooting Error Action No power Check the AC power cord Check the power button at the back of the unit Check the mains fuse on the AC power cord receptacle No sound Check that your source is playing general Check that your Al is turned on and that speakers are properly connected Check that the system volume setting is not too low Check that the correct input is selected on your D A controller or preamplifier Check that the correct input is selected on your Al amplifier Check that the correct amplifier mode is engaged No sound Your Al is muted display
9. a chained configuration namely a passive bi amp bridged mode C1 D A Controller nm Ter EXAM 6 BED Al Right HF Bridged Power Amplifier Al Left HF Bridged Power Amplifier Passive bi amp bridged mode chained Als Rev 1 2 Al User Manual 23 CH 4 Operation The A1 Power amplifier is operated from the front panel Feedback to the user is provided by a high definition AMOLED display with customizable colors Setup operations are exclusively handled from the front panel 4 1 Front panel controls 4 1 1 Front panel q 2 3 Front panel elements 1 Standby LED 2 Five user control push buttons 3 Display area high definition AMOLED display The standby LED lights up when the unit is in standby It is normally turned off during operation The LED can also be programmed to remain on during operation if the display is turned off The display is a high definition AMOLED panel with very wide viewing angle high contrast and high brightness ensuring optimal reading comfort The color and brightness of the display can be configured according to user s taste 4 1 2 Front face push buttons The push buttons located on the front panel of the Al are the main user
10. adjustment spikes to move from their fully retracted position There is risk of scratching the installation base if the spikes are not fully retracted when installing the unit 2 6 Cleaning Use a soft dry towel or cloth for cleaning Never use any solvent or liquids as they may damage the surface treatment or penetrate inside the unit 2 7 Maintenance and service The Al power amplifier contains no user serviceable parts Do not try to open modify or repair your Al by yourself This will void any warranty Your Al power amplifier must be checked by a qualified technician in any of the following cases e unit is not functioning properly e mains cable or the power cord receptacle is damaged e unit has been dropped to the floor or presents external damage e The Al power amplifier has been exposed to liquids such as rain or unknown substances Rev 1 2 Al User Manual 15 CH 3 Installation 3 1 Unpacking Unpack the Al power amplifier and store the packaging for future transportation Be careful when lifting the Al as the unit is heavy over 40kg Get someone to help you if necessary When unpacking and installing the take care not to damage the high quality surface treatments 3 1 1 Removing the security screws The transformer base plate must be secured during transportation to avoid damage to the isolating silent blocks Three security screws are located on the bottom of the unit To remove the se
11. face push buttons Unit State Unit Action STANDBY c Short Push Any state Mute Unmute STANDBY c Long Push Any state Go to STANDBY UP A Shortcuts except last Modify parameter up when available Last Shortcut SETUP No action OK Shortcut except last 5 to next Shortcut Last Shortcut SETUP or Exit Shortcuts mode Normal mode after current Shortcut has been modified DOWN v Shortcuts except last Modify parameter down when available Last Shortcut SETUP Enter Menu mode CANCEL Shortcuts Exit Shortcuts mode Normal mode Push buttons actions for Shortcuts The GAIN Shortcut gives a good illustration of how to navigate a Shortcut screen Navigating other Shortcuts is similar Rev 1 2 Al User Manual 7 CH I C Y N GAIN 6 1 0 dB T lt 2 0 056 0508 5 4 GAIN Shortcut display elements 1 Shortcut title Parameter being adjusted for other Shortcuts title changes accordingly 2 Arrow indicating UP button a if applies The item below indicates the next parameter value up direction 3 Next Parameter Value if UP button a 1 is pushed parameter up 4 Current Parameter Value 5 Next Parameter Value if DOWN button v is pushed parameter down 6 Arrow indicating DOWN button v if applies The item below indicates the previous parameter value down direction The last Shortcut SETUP is always the same and cannot be re
12. is used throughout the unit and binding posts from the same manufacturer provide the best possible interface to your speaker cables The area where the air flows to cool down the amplifier is isolated from the rest of the Al ensuring all electronics are preserved from dust accumulation Pin assembly of all chassis elements provides smooth joints between elements while screws every 6cm ensures protection against electromagnetic interferences First class mechanical and chemical surface treatments provide the luxury finish of the Four steel feet support the unit Each feet ends with a elastomer ring to sit on delicate surfaces but is also equipped with a height adjustable steel spike to fine tune unit positioning Horizontal adjustment is done with the provided screwdriver through the four adjustment shafts accessible from the top of the unit In addition to providing convenient horizontal adjustment from the top of the unit the shafts also serve as vibration evacuation channels for any stacked unit Special shaft covers are provided to interface with the spikes of the stacked unit Any vibration from the upper unit is transmitted by the shaft cover to the shaft of the lower unit and from there to the lower unit s feet or spikes forming a privileged path for vibrations evacuation 1 4 Modular architecture and slot in boards The Al benefits from a fully modular architecture It features separated sections for power rails analog and digital power supp
13. leave the Ethernet port unconnected A future Al firmware release will provide this functionality 3 3 2 ANALOG IN boards ANALOG IN boards feature a user selectable mono analog input on three different connectors single ended RCA single ended BNC and balanced XLR The analog stage design is fully discrete and balanced Both the RCA and BNC inputs can be configured for high impedance or 300 Ohms load the later allowing for optimal signal transmission when connected to the outputs of 50 or 75 Ohm D A controllers or preamplifiers In addition to their inputs ANALOG_IN boards include an XLR output providing a pass through of the input signal This output can be used to daisy chain multiple Als in multi amplification systems for ultimate performance Balanced connections are recommended for optimal performance Following drawing shows the layout of the connectors on the ANALOG_IN boards Unbalanced Inputs HZ 3000 5 Unbalanced Inputs Hi Z 3000 E 5 3 balanced Inputs Hi Z 3 0 E gl Through D D Balanced Input Balanced Input lo ANALOG IN panel layout 3 3 3 Power cord receptacle and voltage selection Make sure that the voltage selection is set to the correct value with respect to the AC voltage in your location Connect the power cord to the power cord receptacle and plug the power plug to an AC wall outlet only after all other connections have
14. massive oxygen free copper plate is used for signal ground Input AC voltage to the power supply can be set to 100V 115V or 230V AC depending on your local mains voltage 12 Al User Manual Rev 1 2 CH 2 Before Use Please read the following carefully 2 1 Package content Make sure that the package content is complete If not please contact your authorized dealer Your package should contain Al power amplifier with one mono bridged or mono passive bi amp modes only or two input boards depending on the ordered configuration e Power cord e Accessory box User Manual this manual located in the accessory box e Al power amplifier Service Booklet with warranty card located in the accessory box e Adjustment screwdriver located in the accessory box e adjustment steel spikes located in the accessory box e 4x adjustment shafts steel stacking covers located in the accessory box 4x adjustment shafts aluminum top covers located in the accessory box Please store the packaging material for future transportation Check your Al power amplifier for apparent damages In case of damage please contact your authorized dealer If your Al power amplifier is still very cold from transport please let it warm up to room temperature in order to avoid condensation inside the unit 2 2 Safety notice Make sure to observe the following rules e Install your Al power amplifier on a stable base e not install your Al p
15. shared among both amplification channels and the Al delivers 100 W under 8 Ohm per channel It is the configuration used when a single Al drives a pair of speakers Adive Bi Amp Mode As for Stereo Mode Active Bi Amp Mode links each amplification stage its dedicated input board Feedback and gain can however be adjusted individually for each channel in order to best match the requirements of each driver An active cross over is generally used to split the signal into different frequency bands between the system controller preamplifier such as CH Precision s C1 and the power amplifiers In the Active Bi Amp Mode the Al delivers 100 W under 8 Ohm on each channel It is optimal if the speaker has an external active crossover filter network 1 1 2 Feedback control One of the Al s most unique features is its user controllable feedback This feature provides control over the ratio between global and local feedback applied in the 5 amplification stage Global feedback takes a portion of the output signal after the power stage and feeds it back to the input of the amplifier This ensures a very low output impedance and low distortion figures Local feedback on the other hand does not include the output stage and lets the latter operate in open loop mode This favors small signal details and timing As a rule of thumb a higher ratio of global feedback is preferred for grip and control in the low frequencies whereas a lower ratio is preferre
16. termination 2 B CLASS is displayed if the gets too warm and the Class A polarization is turned off 3 Mute indication If the symbol is present the output is muted 4 Meter level of instantaneous power Gives an image of peak power fed to the load Except for bridged mode the maximum power among the 2 channels of the Al is displayed 5 Average temperature of the 2 output boards in degrees Celsius 6 Global feedback applied in the right channel output board only displayed in bi amp modes 7 Global feedback applied in the left channel output board bi amp modes or in both channels output boards stereo or bridged modes 8 Amplifier mode stereo mono bi amp or bridged Displayed elements depend on the installed optional boards and user settings In the example above the Al is set as a bi amplifying mono power amplifier using its balanced XLR input connectors running in class B with its output muted by the way in that case the power display should be 0 W Its internal temperature is 23 C which is not a temperature at which it can turn to class B mode The left channel is only applying local feedback while the right channel is applying a mix of 40 global feedback and 60 local feedback Following table shows the actions of the front panel push buttons in Normal mode Front face push buttons Unit State Unit Action o short push STANDBY Wake from STANDBY Any other state Mute Unmute o long push S
17. unit Each Al unit provides 2 expansion slots each supporting a monaural analog input ANALOG_IN board ANALOG_IN boards provides 3 monaural user selectable analog input connectors balanced XLR single ended high impedance Hi 1 300 Ohm RCA and BNC as well as an XLR output monitoring the input signal This output is used to daisy chain multiple Als in multi amplification systems Installation and removing of optional boards must be done by a qualified technician only Do not attempt to install or remove any optional board by yourself as this would void the unit s warranty 3 3 1 CONTROL board The CONTROL board is factory installed into the Al It provides a USB port for software updates and an Ethernet port for controlling the unit over a network Following drawing shows the layout of the back panel of the CONTROL board 4 Control o Ethernet PoE compliant FAT32 formatted disk only 6 USB fimuare update CONTROL board back panel layout Rev 1 2 Al User Manual 19 CH 3 3 1 1 USB port The USB port on the CONTROL board is dedicated to the firmware update of the Al unit Do not use it for any other purpose For more information on unit firmware update please refer to the corresponding section of this manual 3 3 1 2 Ethernet port The Ethernet port on the CONTROL board is dedicated to network based control of the unit This functionality is currently not implemented thus
18. CH Al Power Amplifier User Manual CH CH Dear Client We are honored that you have chosen the CH Al Power Amplifier Our team has put all his efforts into designing and manufacturing this top quality versatile and future proof product and is proud to present it to you We hope your will bring you uncountable hours of emotion from your musical collection But before starting your musical journey we kindly ask you to pay attention to the information contained in this manual The as you will discover in the following pages is a Swiss precision product designed for ultimate performance and flexibility However reaching sonic excellence requires your unit to be setup and operated correctly and this what this manual is all about If you have any questions or require assistance please don t hesitate to contact your authorized dealer We hope you will enjoy your Al amplifier for many years The Concert has just begun CH CH FCC Notice Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no gu
19. G gt gt BRIGHTNESS GREEN UPDATE FIRMWARE gt gt gt DISPLAY SETTING gt gt COLOR gt gt EDIT CUSTOM gt gt FACTORY SETTING gt gt COLOR EDIT CUSTOM BLUE RESET ALL SETTING FACTORY SETTING gt gt SHORTCUTS lt lt INSTALLED OPTIONS gt gt INSTALLED OPTIONS ANALOG IN 1 INSTALLED OPTIONS gt gt Al SETUP gt gt NETWORK gt gt ANALOG IN 2 NETWORK STATUS NETWORK gt gt CONFIGURE Al Amplifier menu structure There are five main menus used for configuration of the Al e AUDIO SETTING Allows to adjust audio related parameters e DISPLAY SETTING Allows to adjust display related parameters SHORTCUTS Allows to assign and modify Shortcuts for user interface customization e FACTORY SETTING Indicates the software version and allows to update it Also allows to return to factory settings e INSTALLED OPTIONS Provides information about the installed optional slot in boards e NETWORK Provides information about the network setup and enables its configuration 32 Al User Manual Rev 1 2 CH 4 3 1 Al configuration menu items 4 3 1 1 AUDIO SETTING EN Al SETUP gt gt AUDIO SETTING The Al SETUP gt gt AUDIO SETTING menu allows configuration of the audio related Parameters of the unit Accessible Parameters are GLOBAL FEEDBACK Sets the amount of global feedback for output channels mE FEEDBACK n Tm GLOBAL FEEDBACK L Sets the amount of
20. HORTCUT 3 is set to None SHORTCUT 4 to 6 are DISPLAY SETTING menus not displayed in this case or None SHORTCUT 4 Any Parameter of the None If SHORTCUT 4 is not defined Parameter value for AUDIO SETTING and SHORTCUT 4 is set to None SHORTCUT 5 and 6 are DISPLAY SETTING menus not displayed in this case or None SHORTCUT 5 Any Parameter of the None If SHORTCUT 5 is not defined Parameter value for AUDIO SETTING and SHORTCUT 5 is set to None SHORTCUT 6 is not DISPLAY SETTING menus displayed in this case or None SHORTCUT 6 Any Parameter of the None If SHORTCUT 6 is not defined Parameter value for AUDIO SETTING and SHORTCUT 6 is set to None DISPLAY SETTING menus or None Details of SHORTCUTS menu Parameters Rev 1 2 Al User Manual 35 CH 4 3 1 4 FACTORY SETTING Al SETUP gt gt FACTORY SETTING FIRMWARE VERSION UPDATE FIRMWARE RESET ALL SETTING SHORTCUTS 1 0 Update Reset Default mapping The Al SETUP gt gt FACTORY SETTING menu allows to get information about current Al firmware version to update the Al firmware and to reset the unit fo default configuration or subset of setting Accessible Parameters are FIRMWARE VERSION Current firmware version read only UPDATE FIRMWARE Allows to update the unit s firmware RESET ALL SETTING Returns the unit to factory settings SHORTCUTS Redefines all Shortcuts to factory default The following table details the Paramete
21. NC and balanced XLR Both the RCA and BNC inputs can be configured for high impedance or 300 Ohms load In addition to its inputs the ANALOG_IN board includes an XLR output providing a pass through of the input signal 1 4 2 Firmware update and control CONTROL board The CONTROL board is factory installed into the A1 It provides a USB port for software updates using a flash drive and an Ethernet port for controlling the unit over a network 1 5 Power supply The power supply of the Al is a linear supply with multiple independent local regulations It is based on an oversized magnetically shielded toroidal 1200 VA mains transformer A secondary also toroidal transformer is used as Standby transformer to ensure green Standby mode meeting the latest energy saving regulations Both transformers have static shields between primaries and secondaries They are mounted on a separate steel plate which is isolated from the main base steel plate by silent blocks Custom made Mundorf 4 poles capacitors are used for rectification These capacitors exhibit exceptionally low ESR high speed and high capacitance providing instantaneous response to current draws from the output stage Discrete power transistor and op amp based ultra low noise regulators are used throughout the power supply to ensure the purest low noise DC feed possible to the different sections The input stages of the power section are also fully regulated to avoid any coupling distortion A
22. OL board 3 Power on off switch 4 Analog ground connectors Bottom one can be connected to digital ground Earth using provided jumper 5 single ended analog input for right channel Right ANALOG_IN board 6 BNC single ended analog input for right channel Right ANALOG_IN board 7 single ended analog input for left channel Left ANALOG_IN board 8 single ended analog input for left channel Left ANALOG_IN board 9 Argento Audio left positive or bridged mono negative speaker terminal 10 Argento Audio left negative speaker terminal 11 XLR balanced analog output pass through for Al chaining for left channel Left ANALOG_IN board 12 XLR balanced analog input for left channel Left ANALOG_IN board 13 Transportation security screws to be removed once is placed in its definitive position 14 XLR balanced analog input for right channel Right ANALOG_IN board 15 XLR balanced analog output pass through for Al chaining for right channel Right ANALOG_IN board 16 Earth connector Internally connected to digital ground 17 Power fuse and voltage selection and power cord receptacle 18 USB port for software upgrades CONTROL board 19 Argento Audio right negative speaker terminal The CONTROL board is mandatory in any Al configuration and is always factory installed Depending on arrangement of optional boards in the Al s expansion slots connector arrangement may slightly differ on your
23. Post Left Speaker Binding Post Mono bridged mode 3 4 3 Left or Right Mono mode A pair of Als each equipped with a single analog input board can he used as a pair of high power with very high current capability monoblocks This configuration should be used when low efficiency low impedance speakers are used in large rooms to achieve higher sound level than possible with a single stereo Al The picture below shows how they should be connected in this case Rev 1 2 Al User Manual 21 CH C1 D A Controller TE Tie i 2s emn a li P E gt Al Right Mono Power Amplifier Al Left Mono Power Amplifier ae e le 6 2 Speaker Binding Test E Speaker Binding Mono mode 3 4 4 Passive bi amplification mode A pair of Als each with a single analog input board installed can be used in passive bi amplification mode In such a case each output board of each Al feeds the speaker s drivers of a given frequency range The main advantage of this configuration is the possibility to set optimal global local feedback ratio for the different frequency bands The picture below shows how the Als should be connected in this case CI D A Controller Seo emo 1 Ae 1s AI Right Mono Power Amplifier
24. RAMETER PARAMETER VALUES REQUIRED OPTIONS REMARKS ANALOG IN 1 Analog in left Analog in At least 1x ANALOG_IN Parameters are Read Only ANALOG IN 2 right Details of INSTALLED OPTIONS menu Parameters 4 3 1 6 NETWORK Al SETUP gt gt NETWORK The Al SETUP gt gt NETWORK menu allows knowledge and customization of the network related Parameters of the unit Accessible Parameters are STATUS Listing of all CH products detected product type IP and STATUS 1 device connected MAC addresses eniin CONFIGURE Defines if the Al should interact with the network or not offline The following table details the Parameters of the NETWORK menu PARAMETER PARAMETER VALUES REQUIRED OPTIONS REMARKS STATUS IP address Connection to a wired When the Al is in standby it searches its attached Product type network via its RJ 45 network front LED blinking for other CH products MAC address Ethernet port on the Control board All detected CH products are listed here starting with this Parameters are Read Only CONFIGURE This Al is online Connection to a wired When physically connected to a network the Al can This Al is offline network ignore this network offline or connect to it Details of NETWORK menu Parameters 4 4 Returning to Factory defaults The unit can be reset to Factory default settings by using the RESET ALL SETTING item of the FACTORY SETTING menu For a list of Factory de
25. TANDBY Wake from STANDBY Any other state Go to STANDBY A Any state Enter Shortcuts mode 26 Al User Manual Rev 1 2 o Any state Enter Shortcuts mode v Any state Enter Shortcuts mode Any state No effect Push buttons actions in Normal mode 4 2 2 Shortcuts The Al amplifier is configured by a set of menus as described in the next sections To allow quick access to the most frequently used configuration menu items the Al offers the concept of Shortcuts Shortcuts are fully programmable and the user may choose any configuration parameter as a Shortcut There are up to 6 user programmable Shortcuts To learn how to program individual Shortcuts please refer to the SHORTCUTS menu item in the next section For a list of Factory default Shortcuts please refer to the Specifications section Shortcuts are accessed from Normal mode by a push of the OK e UP 4 or DOWN v buttons on the front face Additional OK push skips to the next Shortcut The last Shortcut is always dedicated to entering the Menu mode SETUP On this last Shortcut an OK e push will return to Normal Mode and an UP a push will enter the Menu mode The individual parameter for a given Shortcut is modified using UP a or DOWN v buttons If there is no user action for about 10 s the unit will revert to Normal mode Following table shows the actions of the push buttons for Shortcuts Front
26. and right channels 0 dB CHANNEL if 2 ANALOG IN are loaded while LEFT BRIDGED or PASSIVE BI AMP mode is selected DISPLAY SETTING Rev 1 2 Al User Manual 43 CH DISPLAY MODE Status LED ON OFF Off BRIGHTENESS 80 COLOR Blue CUSTOM COLOR VFD like SHORTCUTS SHORTCUT None SHORTCUT2 None SHORTCUTS None SHORTCUT4 None SHORTCUTS None SHORTCUT6 None Factory settings 44 Al User Manual Rev 1 2 CH Rev 1 2 AT User Manual 45 CH CH Precision Sarl 7 Le Tr si 6D CH 1028 Pr verenges SWITZERLAND www ch precision com info ch precision com Made in Switzerland 6 Al User Manual Rev 1 2
27. arantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures adjust or relocate the receiving antenna increase the separation between the equipment and the receiver connect the equipment into a mains outlet on a circuit different from that to which the receiver is connected consult the dealer or an experienced ratio TV technician for help Disposal Environmental care Directive 2002 96 EG of the European Parliament requires consumer electro technical appliances to be disposed separately and have to indicated with the following symbol Should you dispose this component please do so in conformity with local and global legal and environmental regulations and according to best practices We strongly encourage you fo recycle any batteries used with this component CH Table of contents LERNTE und nee usa 8 1 1 Unmatched flexibility nes 9 9 0 1 1 3 Gain 7 77 0 1 1 4 Bias 77 0 1 2 Advanced monitoring circuit 10 LAS DONO NET 10 1 2 2 Temperature MONO sn nono nano PP dava nn 11 1 3 Mechanical construction 1 1 4 Modular architecture and sl
28. area 3 must be off Unmute using first button amp is displayed Lost in the settings Restore factory setting and start your setup again Software update fails Try Emergency Software Update procedure If it fails download the latest Al firmware from www ch precision com prepare a software update image on a FAT32 formatted USB stick and run the Emergency Software Update procedure again Troubleshooting If the error cannot be corrected using the information from the above table disconnect the unit from AC wall power and from the rest of your system and contact your authorized dealer Rev 1 2 Al User Manual 4l CH 7 Specifications 7 1 Specifications Output power Stereo passive amp active bi amp modes 2 X 00Wens 8Q 2 X 7 5Wens 40 2 X 300Wens 20 Left or right mono mode X 1 75Wens 4Q X 300Wens 20 1 X 550 1Q Bridge mode X 350Wens 8Q 1 X 600Wens 40 X 800Wens 20 Analog inputs per Analog In input board two Analog In input boards are required for Stereo amp active bi amp modes Single ended RCA 1x BNC per input board Zin 47kQor 3000 Balanced 1x XLR per input board Zin 94kQ pin GND pin pin3 Amplification Input stage Ultra low noise high slew rate zero global feedback full discrete class A design Output stage Ultra low noise high slew rate
29. been made 3 4 Amplifier modes This section describes most standard setups in which one or multiple Als can be integrated 3 4 1 Stereo mode Asingle Al equipped with two analog input boards can be used as a stereo power amplifier This is the simplest configuration that already allows to enjoy the unique sound of the A1 amplifier The picture below shows how it should he connected in this case 20 Al User Manual Rev 1 2 CH Cl D A Controlle 9 6 9 Right Speaker Binding Post Left Speaker Binding Post 9868 Stereo mode 3 4 2 Mono bridged mode A pair of Als each equipped with a single analog input board can he used as a pair of high power with high voltage swing monoblocks This configuration should be used when low efficiency high impedance speakers are used in large rooms to achieve higher sound level than possible with a single stereo This configuration also exhibits a better signal to noise ratio The picture below shows how they should he connected in this case CI D A Controller 43 ie 9 c Al Left Mono Power Amplifier AI Right Mono Power Amplifier e Right Speaker Binding
30. ch Al s channel Both values are sampled at around 100 kHz ensuring peak values are properly detected This circuitry has several purposes give the user a feedback of the peak power fed to the speakers and detect malfunctions such as short circuits disconnected speakers or amplifier damage 10 Al User Manual Rev 1 2 CH 1 2 2 Temperature monitoring The DSPs are also responsible for reading both the power transistors and the radiators temperatures If the temperature gets excessive the fans located underneath the radiator will start forcing a larger air flow to cool down the A1 If that is not sufficient and the Al keeps warming up the class A polarization is turned off forcing the to work in pure class B If removing the output stage bias current is still not enough and the temperature keeps rising the Al will protect itself by entering standby mode Please note that under normal conditions none of the above should happen except for the fans helping the Al to cool down when used at very high level 1 3 Mechanical construction The Al power amplifier is assembled from high quality aluminum and steel elements with no visible screws on the front top and side panels The front panel base side panels and top cover are machined from aluminum The power supply is based on a fully shielded 1200 VA toroidal transformer and custom Mundorf rectifying capacitors sitting in the central position of the unit Argento Audio internal wiring
31. curity screws tilt the unit on its side and unscrew Do not tilt the unit on the front or back panels as this may damage the front plate or the connectors Security screw location 1 Security screws Must be mounted for transport and removed at installation 3 2 Positioning Position the unit on a stable base Make sure cooling air is able to freely flow around the unit especially under the unit and on its sides 16 Al User Manual Rev 1 2 CH When used as a stereo power amplifier or in a horizontal multi amplification configuration each Al driving the same section of both left and right channels the Al should be located close to its matching D A controller or preamplifier with short modulation cables preferably using the XLR balanced input When used as a mono power amplifier or in a vertical multi amplification configuration each A1 driving different sections of either left or right channel we recommend to locate each Al close to the loudspeaker it drives using short speaker cables The recommended modulation cable to connect the Al to its matching D A controller or preamplifier is again a balanced XLR 3 2 1 Unit position adjustment The Al power amplifier is equipped with height adjustable feet More precisely each feet has an internal height adjustable spike which can be accessed with the provided adjustment screwdriver through the adjustment shafts When delivered from factory the adjustment spikes are not
32. d for speed and details in the high frequencies This rule is however not absolute as each speaker and cross over are different and we highly recommend fo try out various settings to find the best match with the connected loudspeakers especially if the Al is driving a complete full bandwidth loudspeaker In multi amplification systems different feedback settings are commonly used for the various speaker sections opening a whole new level of performance We recommend to start with pure local feedback and increase the global feedback until the bass are tight enough for your personal taste Feedback settings can be adjusted on the fly from the Al s front panel 1 1 3 Gain control The Al provides an integrated gain control with a 24 dB range and 0 5 dB steps This gain control allows for optimal matching of speaker sensitivity room size and preamplifier output level In multi amplification systems it can be used to match the sensitivity of the individual speaker sections Gain is conveniently accessed by a front panel control and can be set on the fly 1 1 4 Bias adjustment The Al provides an advanced bias control circuitry that not only follows slow temperature variations but also accurately takes into account all the dynamic aspects induced by transients in the musical content 1 2 Advanced monitoring circuit 1 2 1 Power monitoring Each power amplifier board is equipped with a DSP that monitors the instantaneous voltage and current output of ea
33. e of aluminum can be used when units are not stacked or for the top unit when stacked It covers the shaft and provides a smooth finish to the top of the unit Shaft covers are located in the accessories box delivered with your Al unit Rev 1 2 Al User Manual 17 CH Never stack any component other than CH s on your Al Never use the aluminum shaft covers top covers when another CH component is to be stacked on top of your Shaft covers stacking cover right top cover 3 3 Connections This section provides information about how to connect your Al power amplifier to your system As the 15 a modular design with different optional boards the description applies to the example configuration presented below For details about how to integrate you AI s in a specific setup please refer to the Amplifier modes section of this user manual If you don t feel secure with the connections to be applied fo your configuration please contact your authorized dealer for assistance The example configuration is a stereo ready 2 input boards power amplifier Your configuration could only contain a single input board 1 2 3 qw 5 6 07 8 9 19 18 13 13 17 16 15 14 13 12 11 10 Al rear panel connections 1 Argento Audio right positive or bridged mono positive speaker terminal 18 Al User Manual Rev 1 2 CH 2 Ethernet port for command interface CONTR
34. eturn to previous menu level without saving Push button actions in Menu mode Following illustration shows the elements of a the A1 SETUP Menu page the entry point to the A1 menu structure a Y N Al SETUP AUDIO SETTING gt Global feedback DISPLAY SETTING Clock source SHORTCUTS Input FACTORY SETTING Amplifier mode INSTALLED OPTIONS Gain NETWORK 3 2 Al SETUP menu display elements Rev 1 2 Al User Manual 29 CH 1 2 3 Menu title When entering a menu item the title also shows the parent menu If the AUDIO SETTING menu is entered the title line would display Al SETUP gt gt AUDIO SETTING Shows the accessible parameters when entering the currently highlighted menu item In this example AUDIO SETTING is highlighted and the second column shows the parameters accessible in the AUDIO SETTING menu List of items in the current menu Navigate from one item to the other by pressing the UP a and DOWN v buttons To enter the highlighted menu item press the OK e button To return to the previous menu level press the CANCEL button In this example the CANCEL x button exits the Menu mode and sets the unit back to Normal mode Once a menu item is selected by a push of the button parameters for the corresponding menu item can be navigated and accessed As an example the following drawing shows the display elements of the Al SETUP gt gt AUDIO SETTING sub menu
35. ev 1 2 CH 4 3 1 3 SHORTCUTS Al SETUP gt gt SHORTCUTS SHORTCUT SHORTCUT 2 SHORTCUT 3 Global feedback Display mode None The Al SETUP gt gt SHORTCUTS menu allows configuration of the Shortcuts Accessible Parameters are SHORTCUTI SHORTCUT2 SHORTCUTS SHORTCUTA SHORTCUTS SHORTCUTS Defines action for Shortcut 1 Defines action for Shortcut 2 Defines action for Shortcut 3 Defines action for Shortcut 4 Defines action for Shortcut 5 Defines action for Shortcut 6 Note that unused Shortcuts are not displayed The first available e g non defined Shortcut has a Parameter Value of None the example on the left has 2 defined Shortcuts hence Shortcut 3 has a Parameter Value of None The following table details the Parameters of the SHORTCUTS menu PARAMETER PARAMETER VALUES REQUIRED OPTIONS REMARKS SHORTCUT 1 Any Parameter of the None If SHORTCUT 1 is not defined Parameter value for AUDIO SETTING and SHORTCUT 1 is set to None SHORTCUT 2 to 6 are DISPLAY SETTING menus not displayed in this case or None SHORTCUT 2 Any Parameter of the None If SHORTCUT 2 is not defined Parameter value for AUDIO SETTING and SHORTCUT 2 is set to None SHORTCUT 3 to 6 are DISPLAY SETTING menus not displayed in this case or None SHORTCUT 3 Any Parameter of the None If SHORTCUT 3 is not defined Parameter value for AUDIO SETTING and S
36. fault settings please refer to the Specifications section Rev 1 2 Al User Manual 37 CH 5 Firmware update 5 1 Introduction The Al power amplifier includes multiple programmable circuits This approach allow the unit to be updated to support new features It includes a host micro controller a display controller and a pair of DSPs for operating conditions monitoring All of these components run firmwares which can be updated when needed for instance to support additional features or to correct possible bugs The following sections describe how to update the complete firmware of your Al power amplifier 5 2 Firmware Update procedure 5 2 1 Preparing the firmware image Before doing the actual firmware update it is necessary to prepare the firmware update image Firmware update images are available in the form of compressed z ip files from our website at www ch precision com The following procedure shows how to prepare the firmware image 1 Start by downloading the latest Al firmware image from www ch precision com 2 Prepare a blank FAT32 formatted USB stick 3 Decompress the firmware image zip file to the root of your USB stick After doing so your USB stick should contain the following files e Al 9 1 Firmware update file for Al operating conditions monitoring DSPs e Al 1 Firmware update file for A1 Micro controller e Al 11 Firmware update file for Al Display controller where lt
37. global feedback for left channel aiance SUBIRE Mono bridged ore FEEDBACK js the amount of global hs right channel GAIN 0 dB elects an input connector and impedance termination AMPLIFIER MODE Selects in which mode the amplifier works stereo mono GAIN Adjusts the gain for both channels GAIN L Adjusts the gain for left channel GAIN R Adjusts the gain for right channel CHANNEL Selects which input channel should used The following table details the Parameters of the AUDIO SETTING menu PARAMETER PARAMETER VALUES REQUIRED OPTIONS REMARKS GLOBAL FEEDBACK 0 20 80 100 Stereo or bridged mode None GLOBAL FEEDBACK 0 20 80 100 mode None GLOBAL FEEDBACK R INPUT Balanced XLR Hi Z None None BNC 300 Ohm BNC Hi Z RCA 300 Ohm RCA Hi Z AMPLIFIER MODE Stereo 2 input boards None Mono active bi amp 2 input boards Mono passive bi amp None Mono bridge None Mono left None Mono right None GAIN 24 dB range by 0 5dB Stereo or bridged mode None steps GAIN L 24 dB range by 0 5 48 Bi amp mode In passive bi amp mode left and right channel can GAIN R steps only have a gain difference of up to 6 dB CHANNEL Left Right 2 input boards passive bi amp or bridged mode Details of AUDIO SETTING menu Parameters Rev 1 2 Al User Manual 33 CH 4 3 1 2 DISPLAY SETTING Al SETUP gt gt DISPLAY SETTING DISPLAY MODE Status BRIGHTNESS 80 Blue COLOR The Al SETUP
38. gt gt DISPLAY SETTING menu allows configuration of the display related Parameters of the unit Accessible Parameters are DISPLAY MODE Selects what is displayed in normal mode LED ON OFF Selects if the LED is turned on when the display is off BRIGHTNESS Sets the display brightness COLOR Selects the display color The following table details the Parameters of the DISPLAY SETTING menu PARAMETER PARAMETER VALUES REQUIRED OPTIONS REMARKS DISPLAY MODE Off None Allows to select what is displayed Al status power Status meters or temperature gauges if anything Power This is combined with the LED ON OFF Parameter Temperature LED ON OFF On None If the display is turned off setting the LED ON OFF Off Parameter to On will make sure the LED in the logo remains lit during operation If the LED ON OFF Parameter is set to Off the LED will turn off during operation whatever the value of the DISPLAY ON OFF parameter BRIGHTNESS 10 None Sets the display brightness 20 30 90 100 COLOR Predefined colors None Selects the display color for PCM playback Custom color Edit custom color Predefined colors represents a set of factory defined colors Custom color is a user definable color To Edit the custom color select the Edit custom color Value Sub menus allow 10 individually configure Red Green and Blue components RGB of the custom color Details of DISPLAY SETTING menu Parameters 34 Al User Manual R
39. input devices 24 Al User Manual Rev 1 2 CH 1 o0 aO eO vO 4 nO 5 Front panel push buttons Button number Buttonsymbol Description 1 o Standby long push Mute Unmute short push 2 A Up 3 e OK 4 Y Down 5 Cancel Front panel push buttons description 4 2 Operating modes The Al power amplifier has two main operating modes Normal mode and Menu mode Normal mode is mainly used to display general status such as power or temperature of the Al whereas Menu mode is used to configure the unit The Al also includes Shortcuts for quick access to selected Menu mode items Shortcuts are user programmable and most Menu mode items can be selected as Shortcuts 4 2 1 Normal mode In normal mode the Al can he configured to display its general status such as operating mode stereo mono input XLR BNC RCA feedback ratio peak power and average temperature in a standard CH Precision manner like in the 01 and It can also be set to display a peak power vu meter or a temperature gauge of each output channel When powered on the Al starts in Normal mode The status display looks as follows Rev 1 2 Al User Manual 25 CH 1 2 3 1 r BALANCED XLR 1455 60 12W4 GLOBAL FB 0 40 230 lt 6 7 6 Normal mode display elements 1 Input connector selected and impedance
40. ion the Al is delivered with a single input board and provides following modes of operation Bridged Mono Mode In this mode the Al operates as a very high power mono power amplifier where both amplification channels are used in balanced mode for a single audio channel When configured in Bridged Mono Mode the Al can deliver up to 350 W under 8 Ohm It is optimal for high impedance speakers in large rooms requiring large voltage swings Left or Right Mono Mode In this mode the entire power of the transformer is dedicated to a single output channel In Left or Right Mono Mode the Al can deliver 550 W under 1 Ohm It is optimal for low impedance speakers requiring large amount of current Passive Bi Amp Mode In this mode the Al operates its two power amplification stages in parallel each channel driving a different speaker terminal with the same signal Feedback and gain can be adjusted independently for each channel to best match the individual speaker sections In Passive Bi Amp Mode each channel delivers 100 W under 8 Ohm It is optimal with speakers with more than one binding post pair on its passive crossover filter network By adding a second input board the Al provides following additional operating modes Stereo Mode In Stereo Mode each amplification stage is driven by its dedicated input board and the amplifier operates Rev 1 2 Al User Manual 9 CH as a standard stereo power amplifier Feedback and gain settings are
41. lies front panel signal routing and central host processor monaural analog input boards and single channel amplification boards This modular architecture combined with the USB plug for firmware update allows for easy servicing and upgrade should one section become faulty or obsolete The slot in boards section consists in a vertically mounted mother board with optional boards plugged into it Optional boards provide audio functionality and connectivity to other equipment There are two types of slot in boards ANALOG_IN provides mono single ended and BNC both configurable as either high impedance or 300 Ohm terminated and balanced XLR analog audio input One left or right or two left and right such boards can be fitted into the Al By default the Al is factory delivered with a single ANALOG_IN board e CONTROL provides a USB port for software upgrade and an Ethernet port for command The CONTROL board is factory mounted in each Al Rev 1 2 Al User Manual CH There are three slots the Al Two of them can be populated with a left ANALOG IN and or a right ANALOG_IN board The last slot is dedicated to the CONTROL board Note that optional boards MUST be installed by a qualified technician Failure to do so will void any warranty 1 4 1 Monaural analog inputs ANALOG_IN board The ANALOG_IN board features a user selectable mono analog input on three different connectors single ended RCA single ended B
42. mounted in the feet but are located in the accessory box Remove the adjustment spikes from the accessory box and put one into each adjustment shaft Place the provided screwdriver into the adjustment shafts and turn clockwise to secure the spikes and make the required adjustments When the spikes are fully retracted the sits on elastomer rings to protect the base If the base which the is located is fragile or should not be scratched please make sure to use the optional CH support discs to protect the base P Adjustment shafts feet and spikes 1 Adjustment shafts Insert adjustment spikes and use screwdriver to secure and adjust individual feet spikes 2 Feet 3 Adjustment spike heads when inserted into adjustment shafts 4 Adjustment spike 3 2 2 Adjustment shaft covers Once the position of the unit is adjusted place the appropriate shaft covers on the four adjustment shafts There are two types of shaft covers delivered with your Al unit One type of shaft cover stacking cover made of steel is used when different CH units are stacked This type of cover includes a receptacle to receive the corresponding spike of the unit placed just above By doing so mechanical vibrations are optimally transmitted to ground and minimized inside CH units The second type of shaft cover top cover mad
43. moved or altered It gives access the Menu mode to access the detailed setup of the unit 1 DETAILED SETUP EXIT gt T 3 ENTER x SETUP Shortcut display elements 1 Shortcut title It indicates that Detailed Setup Menu mode can be entered at this stage 2 Current value of the parameter Default action is to exit go back to Normal mode 28 Al User Manual Rev 1 2 CH 3 Arrow indicating UP button A 4 Next parameter value If UP button a is pushed the unit enters into Menu mode 4 2 3 Menu mode The Menu mode allows for Configuration and Setup of the Al power amplifier through a set of menus Menu mode is entered from the last Shortcut item see above From Normal mode enter the Shortcut mode by pushing the OK button By successive OK e button pushes step to the last Shortcut item DETAILED SETUP and push the TOP A button once to enter the Menu mode Navigation in Menu mode is based on UP 4 and DOWN v buttons to select an item or to change a value The OK button is used for validation and CANCEL zs to exit without saving Front face push buttons Unit Action STANDBY c Short Push Mute Unmute the unit STANDBY c Long Push Put the unit into Standby UP Move to next menu item upward e Enter next menu level or Validate choice save setting DOWN v Move to next menu item downward CANCEL R
44. ot in boards 1 1 4 1 Monaural analog inputs ANALOG_IN board 12 1 4 2 Firmware update and control CONTROL board 12 M M D MD A ME 12 2 Before c NN ORC 13 2 1 TTE URN RE 13 ES NOl oot edm dia Mu MM EM DU MEE 13 4 2A Moins D RENNES 14 2 5 Transport and 14 a 15 2 7 Maintenance and 15 KNEE TENET 16 SNR DAD MENS NR PT 16 3 1 1 Removing the security screws 16 2 2 OMIS En e GN tenons UTRUM NO TUO 16 3 2 1 Unit position AMEN naar du one 17 3 2 2 Adjustment shaft covers 7 17 9 9 COMUNE OTS unc quemar PR a Sauer p meri FM REN n FOX ndr enr free 18 3 3 1 CONTROL DOOR ne ne nd 19 RARE DI P a ed ne 20 dI Ri 20 20 3 3 3 Power cord receptacle and voltage selection 20 3 4 Amplifier TOURS ne en anion eic tr 20 EN ESTUDIOS 20 3 4 2 Mono bridged ae bat a EH E Gum ORA Du rade 21 3 4 3 Left or Right Mono mode 21 1 7 22 3 4 5 Active bi amplification mode 22 8 3 0 ADEE 24 4 1 Front panel controls us 24 4 1 1 Front pe etes 24 4 1 2 Front face push buttons 24 6 Al User Manual Rev 1 2 CH A LO 25 25
45. ower amplifier near water e Always handle with care The Al power amplifier is heavy so have someone help you when moving it around not expose the unit to any kind of liquid e not install in direct sun light or near any heat source such as radiators or other apparatus generating heat Rev 1 2 Al User Manual 13 CH e Do not install in a confined space and make sure sufficient air can flow around the unit including under the unit e Never install your Al power amplifier directly on a carpet or any soft material as fresh air flow from openings under the unit to the side apertures is required for proper cooling of the unit not operate under high ambient temperature gt 40 C or with extremely high humidity such as in humid cellars e Only use options and accessories specified or recommended by the manufacturer not open the unit nor try to service it by yourself Do not try to install any option board by yourself Always refer to a qualified technician for service maintenance or upgrades Failure to do so will void the unit s warranty 2 3 User Manual Please read this manual carefully before making connections or operating your Al power amplifier After reading store the manual in an accessible place for future reference If after reading this manual you feel unsure about how to make connections or how to operate the unit please contact your authorized dealer 2 4 Mains supply Make sure to use 3
46. ransformer of each Al is dedicated to a loudspeaker but only one output board is used bridged mode to nearly quadruple the available power per channel passive bi amp each channel powers a specific speaker driver or active bi amp when an active crossover network is placed between the preamplifier and the Al Moreover multiple Als can be chained for ultimate performance using multiple Als per speakers For increased flexibility the A1 also provides two unique features global local feedback ratio and gain adjustments The amount of global feedback in the amplifying loop of each channel can be adjusted to best match virtually any speaker on the market The amplifier gain can also be adjusted over a 24 dB wide range by 0 5 dB steps This also greatly helps in matching the output level of the preamplifier the efficiency of the connected loudspeakers and the listening room Three standard input connectors are available balanced XLR single ended RCA and BNC Unbalanced inputs can be configured as high impedance input or a 300 Ohm load can be engaged to match the output of 50 or 75 Ohm D A controllers or preamplifiers A pass through XLR line level output is also provided for daisy chaining multiple Als 4 5 2 6 7 8 9 8 6 SW Wl DA Contin LEE pee ty FS NENNEN
47. rs of the FACTORY SETTING menu PARAMETER RELATED ACTION VALUE REQUIRED OPTIONS REMARKS FIRMWARE VERSION Firmware version Firmware version indicates the version of the current firmware Format is x y This parameter is read only None UPDATE FIRMWARE Update Selecting Update launches the Al firmware update process A USB flash disc drive with a valid set of firmware must be inserted in the A shaped USB port None RESET ALL SETTING Reset None Selecting Reset returns the to its factory settings Factory settings are detailed in the Specifications section SHORTCUTS Default mapping Selecting Default Mapping returns the Al s Shortcuts fo their factory settings Factory settings are detailed in the Specifications section None 4 3 1 5 Details of FACTORY SETTING menu Parameters INSTALLED OPTIONS Al SETUP gt gt INSTALLED OPTIONS ANALOG IN 1 Analog in left ANALOG IN 2 Analog in right The Al SETUP gt gt OPTIONS menu provides read only information about installed slot in boards Details are ANALOG IN 1 Input board installed in Slot 1 ANALOG IN 2 Input board installed in Slot 2 Each slot indicates the type of board it handles A indicates that the slot is currently unpopulated 36 Al User Manual Rev 1 2 CH The following table details the Parameters of the INSTALLED OPTIONS menu PA
48. terminals phase neutral and earth power cords with ground conductor Make sure that the mains voltage selection of the unit matches your mains voltage Make sure your Al power amplifier is disconnected from AC wall power in the following cases e When making connections it is also recommended to disconnect the rest of the system from AC wall power e When cleaning e During thunder storms When unused for a long period 2 5 Transport and packaging The Al power amplifier must always be stored in its original packaging for transportation Doing so will ensure optimal level of protection of your unit Therefore keep all the packaging material in a dry and clean place for future use In addition the transformer base plate must be secured for transportation to avoid excessive constraints on the silent blocks isolating the chassis from transformer vibrations This is done hy the insertion of three security screws on the bottom of the unit Failure to do so will void the warranty as it may cause the silent blocks to tear up and the heavy transformer module to move inside the A1 resulting in severe damages to all Al components Do not forget to install these screws for transportation and to 14 Al User Manual Rev 1 2 CH remove them at installation of the unit in its new location Finally we recommend to remove the adjustment spikes and to put them into the accessory box for transportation Indeed vibrations during transport may cause the
49. the unit do NOT unplug the unit from the AC wall outlet and do NOT turn the mains power switch off Interruption of the Firmware Update procedure may result in corrupted firmware and non functioning unit In case something has gone wrong during a Firmware Update and the unit is not functioning correctly anymore apply the Emergency Firmware Update procedure described in the next section 5 2 3 Emergency Firmware Update procedure Apply the following Emergency Firmware Update procedure if your unit is not functioning correctly after a failed Firmware Update procedure l 2 Turn the unit completely off by setting the Power on off switch to off Prepare and insert the USB key with the appropriate firmware image for your unit make sure all files are present Push the STANDBY c button and power up the unit by setting the Power on off switch to on Keep the STANDBY button pushed until you hear the internal relay dick a couple of seconds The unit will start up in Emergency Firmware Update mode and will update its internal firmware with the firmware images present on the USB stick Do not interrupt or unplug nor interact with the unit until the Emergency Firmware Update is finished This will take several minutes Please note that the unit will perform a quick Reset display turning off and back on during this procedure Once the Emergency Firmware Update is finished the units goes into Standby mode Remove the USB stick and wake
50. with adjustable feedback full discrete class AB design Feedback Unique user programmable local global feedback ratio of the amplification stage Gain 24 dB range adjustable gain 0 5 dB steps Analog Audio outputs Speaker terminals 2 pairs of Argento Audio binding posts THD Noise Less than 0 01 1kHz signal BW 20Hz 20kHz 10Wus under 8C all operating modes with 100 global feedback SNR A Better than 115dB Stereo Mode better than 11 8dB Bridge Mode Bandwidth DC to 450kHz 3dB at 1Wens General Display 480 x 272 24bits RGB AMOLED Power supply Selectable 1 00V 11 5 or 230V AC 47Hz to 63Hz 1W in Standby Dimensions 440mm x 440mm x 120mm 43kg Software update USB port for software update Ethernet based system control future release Specifications Design and Specifications are subject to change without notice Weight and dimensions are approximate Illustrations are informative only and may differ from actual production models Casing design by Mana Ishoni 42 Al User Manual Rev 1 2 CH 7 2 Dimensions 120 mm 133 mm including feet 440 mm 483 mm including connectors Al Power Amplifier dimensions 7 3 Factory settings Following table lists the factory settings of your Al power amplifier SETTING Value AUDIO SETTING GLOBAL FEEDBACK both left and right channels 0 INPUT Balanced XLR AMPLIFIER MODE Bridged GAIN both left

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