Nexo NXAMP4X1 User Manual
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Nexo NXAMP4X1 User Manual

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NXAMP4X1 Powered TDcontroller
User Manual v1.2 (LOAD2_48)

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  • Page 1 NXAMP4X1 Powered TDcontroller User Manual v1.2 (LOAD2_48)
  • Page 3 FCC requirements. Modifications not expressly approved by which can be determined by turning the unit “OFF” and “ON”, please try to NEXO-SA may void your authority, granted by the FCC, to use the product. eliminate the problem by using one of the following measures: 2.
  • Page 4 • Do not open the device or attempt to disassemble the internal parts or modify them from the outlet, and have the device inspected by qualified NEXO-SA service in any way. The device contains no user-serviceable parts. If it should appear to be personnel.
  • Page 5 • Always turn the power off when the device is not in use. • The performance of components with moving contacts, such as switches, volume controls, and connectors, deteriorates over time. Consult qualified NEXO-SA service personnel about replacing defective components.

  • Page 6: Table Of Contents

    TABLE OF CONTENT TABLE OF CONTENT TABLE OF CONTENT ................................. 6 NXAMP4X1 VERSUS NX242: WHAT’S NEW ? ......................10 ’ ? ............................10 S REMAINING THE SAME ....................................10 CORE ................................10 EVEL AND LATENCY ....................................10 OFTWARE ’ ?................................10 S CHANGED ................................
  • Page 7 TABLE OF CONTENT SETTING-UP ADVICE...............................19 ................................19 ARTH CONNECTION ..................................19 AINS SETTING NXAMP4 & ) .............19 OUNTING THE IN A RACK ROUNDING SHIELDING SAFETY ISSUES NXAMP4 ..........................21 SING THE WITHOUT A RACK ......................................21 USES ...........................21 LECTROMAGNETIC ENVIRONMENTS ............................21 NALOGUE INPUT SIGNAL CABLES NXAMP4 ..........................23 POWER OUTPUTS WIRING...
  • Page 8 NPUT PATCH (11) A ............................... 58 RRAY SETTINGS (12) V ..............................59 IRTUAL FRONT PANEL NXWIN4 SOFTWARE FOR NXAMP4X1 FIRMWARE UPGRADE................60 NXAMP4 1......................60 HAT YOU NEED TO UPGRADE YOUR ................................60 ERIAL PORT UPGRADE PAGE 8 OF 80...
  • Page 9 TABLE OF CONTENT ™ ...............................61 THERSOUND UPGRADE NXAMP4 1 ........................61 ONNECT THE COMPUTER TO THE (1) R ES100 .................................61 EMOTE PORT (2) E ™ IN ..............................61 THERSOUND PORT (3) RS-232 S .................................61 ERIAL PORT ............................61 SING THE SOFTWARE NXAMP4 ..........................63 UT THE IN DOWNLOAD MODE ................................63...

  • Page 10: Nxamp4X1 Versus Nx242: What's New

    What’s remaining the same? DSP core The DSP used in the NXAMP4x1 are from the same family (same core) than the one used in NX242 and on the NXTENSION board. Thus algorithms such as EQ will perform exactly the same on both platforms to allow the user to mix NXAMP4x1 and NX242 with traditional amplifiers at the same time.

  • Page 11: Computing Resources

    The DSP resources have been multiply by 3.5 between the NX242ES4 and the NXAMP4x1 (so it means by 7 between the NX242 and the NXAMP4x1). This will ensure that the NXAMP4x1 will have enough DSP resources to deal with many years of algorithm improvements.

  • Page 12: Quick Start

    This section will allow you to quickly understand the basic functions of this product. If you already know the previous NEXO digital TDcontrollers, such as NX241 or NX242, you may be able to use the NXAMP Powered TDcontroller quickly as it has been designed with a similar user interface.

  • Page 13: Lcd Display

    QUICK START amplifier to be brought back from Stand-by to power on mode through remote control. (N.B.: Stand-by mode not yet implemented in current Beta ESmonitor remote control software). The last LED, ‘Amp Protect’ reflects the protection status of the amplifier. If this LED is lit, it signifies that the amplifier is reducing or muting one or several outputs due to malfunctions as overheating, output DC, short circuitry …...

  • Page 14: Channel Indicators

    QUICK START (9) Channel indicators For each channel, you have three LEDs indicator. The ‘Sense’ LED will light to green when a certain level of current is detected on the output, meaning that a cabinet is connected and that some signal is flowing to it. The ‘Protect’ LED will light to yellow if the TDcontroller is applying a VCEQ protection on that channel (see further for details).

  • Page 15: Back Panel Description

    Back panel description (1) Mains connectors This is the mains input for the NXAMP4x1. The plug is a Powercon 20A for the 100 ~ 120 Volts model (ref. NXAMP4x1U) and a standard IEC 3 pin for the 220 Volts model (ref.

  • Page 16: Rear End Mounting Holes

    QUICK START (7) Rear end mounting holes If the NXAMP is to be rack mounted and transported frequently, be sure to support the rear end of the unit with mounting hardware that matches the size of the rack used. Basic functions Reset You can reset the unit without powering off by simultaneously depressing buttons A, B &...

  • Page 17: Using The Amplifier Without The Tdcontroller Functionality

    QUICK START Using the amplifier without the TDcontroller functionality If you want to use the amplifier without the TDcontroller, just choose the “FLAT mode” setup. In this mode, no EQ and no protection is applied to the cabinets. Please note that the amplifier will still have 2.2 ms analog input to analog output latency in that mode (i.e.

  • Page 18: What's Inside The Carton Box

    WHAT’S INSIDE THE CARTON BOX What’s inside the carton box WARNING ! The shipping weight of the NXAMP4x1 (U or C version) is nearly 21 Kg (46 lb). Because of the large size of the carton box it is recommended to manipulate the box with two persons.

  • Page 19: Setting-Up Advice

    The rack is a free grounding and shielding structure and it provides extra shielding. Therefore, it is desirable that the screws used to fix the NXAMP4x1 Powered TDcontroller in the frame or rack provide an electrical contact between the chassis of the TDcontroller and...
  • Page 20 SETTING-UP ADVICE the rack. The primary reason for grounding is safety. Conformance to the applicable requirements of the authorities having jurisdiction is, of course, mandatory. However, grounding also has an impact on electromagnetic compatibility. From the EMC point of view, it is desirable to have a low impedance ground network, as a current flowing in the ground network will then produce low voltage in the network.

  • Page 21: Fuses

    Using the NXAMP4x1 without a rack If you do not put the NXAMP4x1 into a rack, then it is mandatory to use the four rubber pads enclosed into the amplifier carton box. These auto adhesive pads should be stuck on each corner of the bottom of the amplifier.
  • Page 22 SETTING-UP ADVICE TDcontroller can sustain high current in pin 1 without degradation of output noise. We recommend that the sources and loads you use have the same desirable characteristics. It is sometimes claimed that connecting cable shield at both ends creates ground loops, and that the current flowing in such loops will produce noise.

  • Page 23: Nxamp4X1 Power Outputs Wiring

    SETTING-UP ADVICE NXAMP4x1 power outputs wiring NEXO recommends the exclusive use of multi-conductor cables to connect the system: the cable kit is compatible with all the cabinets, and there is no possible confusion between LF, MF and HF sections. Cable choice consists mainly of selecting cables of the correct sectional dimension (size) in relation to the load resistance and the cable length.

  • Page 24: General Description

    GENERAL DESCRIPTION GENERAL DESCRIPTION Global architecture diagram bellow shows global architecture amplifier. Power Supply Block Power Supply is certainly the most important part of an amplifier. Most of the time, the Power supply is limiting the power of an amplifier, more than the amplifying circuit itself. The two large power supplies used here, one for channel (1 and 2) and the other for channel (3 and 4).

  • Page 25: Analog Input Block

    GENERAL DESCRIPTION the two converters work in opposite phase, some noise is cancelled; this is preferable for both sound quality and EMC (Electro magnetic compatibility). Analog Input block After linking the two XLRs for each channel, the analog input block has an EMC filter and a precision input buffer that will remove the common noise on the input signal.

  • Page 26: Power Amplifier Blocks

    The power outputs block is used for current and voltage sensing at the output of the amplifier. These datas will be used by the DSP for protecting both the amplifier and the NEXO loudspeaker connected. This stage features also a programmable routing unit that allows using the amplifier in bridge mode on the same speakon pins than in non bridge mode.

  • Page 27: User Interface Block

    Note the symmetrical structure between channel 1 and 2 on one hand and channel 3 and 4 on the other hand. When using the NXAMP4x1 Powered TDcontroller in bridge mode, here is the output routing: Now amplifier channel 1 and 2 works together in bridge mode (channel 2 is marked “Bridge”...
  • Page 28 GENERAL DESCRIPTION pin-out is given bellow: The RxD pin is the “Receive data” pin from the NXAMP4x1 point of view. Thus this is an input. The TxD pin is the “Transmit data” pin from the NXAMP4x1 point of view. Thus this is an output.

  • Page 29: Expansion Slot Block

    ES monitor by Auvitran application, and 4 channels of 24 bits 48 KHz audio). NEXO expansion slot form factor is not compatible with the Yamaha mini-YGDAI form factor. Thus, Yamaha mini-YGDAI card cannot be fitted inside NXAMP4x1 Powered TDcontroller. PAGE 29 OF 80...

  • Page 30: Block Diagram Description

    BLOCK DIAGRAM DESCRIPTION Block diagram description The block diagram bellow shows the global signal path inside the DSPs, for one channel (identical for all the channels): The detail of each block numbered is given bellow. PAGE 30 OF 80...

  • Page 31: Patching And Routing (1)

    N.B.: This user delay will be added to the converter latency, DSP buffering latency and factory set-up delay. The NXAMP4x1 TDcontroller will limit the delay adjustment to a group of channel in specific case such as: • Active setups where two different channels are in the same physical cabinet: it is then impossible to delay one channel without the other one (for example PS15 Active setup, delay is linked between HF and LF).

  • Page 32: Equalising Wideband Acoustical Response (3)

    User set-up, Array EQ For each channel, an Array EQ is currently implemented in the NXAMP4x1. The cut off frequency of a low-shelving filter is factory tuned for each cabinet set-up. The user has access to the gain of this filter.

  • Page 33: Protections

    BLOCK DIAGRAM DESCRIPTION The NXAMP4x1 TDcontroller will limit the user gain adjustment to a group of channel in specific case such as cardioids setups (for example on CD18 setup, gain is linked between front and rear loudspeaker). Protections Each channel has its own simulation and protection process. Each audio channel contains a combination of controlled gain stages (let's call them VCA’s as in our analogue circuitry).

  • Page 34: Hf Displacement Control (12)

    BLOCK DIAGRAM DESCRIPTION particular area (this is block (10)). As with displacement VCEQ, another set of mechanical stress VCEQ is needed for band-pass cabinets (this is block (11)). HF displacement control (12) In case of passive setups, a channel will deal with several loudspeakers after passing through the passive filter of the cabinet.

  • Page 35: Interchannel Regulation (19)

    BLOCK DIAGRAM DESCRIPTION The so-called Physiologic Dynamic Control (see block diagram) is intended to avoid unwanted effects as a result of a too long attack time constant. By anticipating the operation of the temperature limiter, it prevents a high level Audio signal appearing suddenly then being kept up for a period, which is long enough to trigger the temperature limiter.

  • Page 36: Menu Description

    Changing Cabinet Family In order to prevent end-user changing between different NEXO systems set-ups during use, the following procedure is obligatory. This procedure has been purposely designed to avoid any mistakes.

  • Page 37: Adjusting Volume

    MENU DESCRIPTION Repressing A & B buttons while the NXAMP4x1 is starting (this last 20 seconds). At the end of the boot time, you will hear the output relays moving. You should then see the two up and down arrows surrounded in the above drawing. This means that you can change between any speaker setup by turning the wheel.

  • Page 38: Adjusting Delay

    Please note that all the LEDS for volume indication are white except the last one (corresponding to 0 dB attenuation) which is Blue. That allows to quickly checking that all volumes are correctly set on a NXAMP4x1 powered TDcontroller. NB: You can adjust small differences of gain between channels with the gain menu (see further).

  • Page 39: Adjusting Gain

    MENU DESCRIPTION Adjusting Gain The gain of each channel can be adjusted from the Gain menu. Bellow is a picture of this menu. The gain value can be read on the top of the LCD screen for each channel (unit is dB). To change the delay for a given channel, select the channel first by pressing the corresponding “select”...

  • Page 40: Options Menu

    MENU DESCRIPTION The Array EQ value can be read on the top of the LCD screen for each channel (unit is dB). To change the Array EQ for a given channel, select the channel first by pressing the corresponding “select” button. The channel name on screen will then be put between bracket (see on the picture above, channel 2 is selected).

  • Page 41: Input Patch

    MENU DESCRIPTION family means that same cabinet are connected to same outputs of the amplifier. Mainly this menu is for comparing quickly to setup (Wideband and Crossover for example) without restarting the amplifier. To enter this menu, go to the OPTION menu, and display Bellow is a picture of this menu.
  • Page 42 MENU DESCRIPTION depressing the “A” button. Now that one of the channels is selected, you can see the inputs available on the top line of the screen. On the back of the amplifier, you can see Analog Input A, Analog Input B, and so on.

  • Page 43: Save/Recall User Setups

    Analog input A and Digital input C are patched to this channel. Save/recall user setups User setups contain all the settings of the NXAMP4x1 Powered TDcontroller, so you can consider that a user setup is a snapshot of the amplifier state. To access the Save/recall menu, go to the “OPTION”...
  • Page 44 MENU DESCRIPTION On the center of the screen will be displayed the various setups with the setups name. On each side you can select either “Save” or “Recall” function. To save a user setup select the memory block you want to use (there are 32 different memory blocks) by turning the wheel till the chosen memory block appears on the top line of the LCD screen.

  • Page 45: Security

    This menu is not yet implemented in LOAD2_48. GPIO Mode This menu will allow choosing the way the GPIO are handled by the NXAMP4x1 Powered TDcontroller. This menu is not yet implemented in LOAD2_48.

  • Page 46: Miscellaneous Options

    MENU DESCRIPTION Miscellaneous options This menu will allow tweaking different small options available in the NXAMP4x1 Powered TDcontroller. This menu is not yet implemented in LOAD2_48. PAGE 46 OF 80...

  • Page 47: Installation Recommendations

    NXAMP4x1 as this processing is already included inside the NXAMP. Operating SUB’s fed through an Aux Output If the SUB’s are to be operated through a different output than the main system, NEXO strongly recommends that: • The audio chain is strictly identical for SUB’s and MAIN SYSTEM’s mixing board outputs (same devices with same settings).

  • Page 48: Geometrical Alignment

    –r (specified meters or feet). • r > r , the delay should be set on the SUB NXAMP4x1 Powered TDcontroller(s). • r < r , the delay should be set on the MAIN SYSTEM NXAMP4x1 Powered TDcontroller(s)
  • Page 49 INSTALLATION RECOMMENDATIONS If the MAIN SYSTEM phase reading appears to be superior to the SUB phase reading, then MAIN SYSTEM will have to be delayed with a value close to the one given by the geometrical alignment. If SUB appears to be in advance to MAIN SYSTEM, then SUB will have to be delayed with a value close to the one given by the geometrical alignment.

  • Page 50: Nxes104 Expansion Board And Remote Control

    WARNING! Only 48 KHz Ethersound networks are supported. NXES104 Physical description The NXES104 is designed to fit the NEXO’s slot form factor that can be located on the back panel of the NXAMP Powered TDcontrollers. NB: This slot features an 80-pins internal connector that is not compatible with the Yamaha mini-YGDAI slot.

  • Page 51: Ethersound Out Port

    ESmonitor, the remote control software for Ethersound™ network. Connect the PC computer running ESmonitor to this port. WARNING! Do not use this port if your NXAMP4x1 Powered TDcontroller is used in an Ethersound network with some non ES-100 devices (see bellow for details).

  • Page 52: Bi-Directional, Non Es100 Devices

    (2 x 64 channels of 24 bits/48 KHz). Do not use them in a network where ES100 functions are used. NB: The NEXO NX242-ES4 Digital TDcontroller is a bi-directional, non ES100 devices. ES100 devices These devices compatible with the ES100 variant of the Ethersound™ network are bi- directional devices (compatible with both mono and bi-directional networks) that offer new functionalities (we called them the ES100 functions).

  • Page 53: Switches

    NXES104 EXPANSION BOARD AND REMOTE CONTROL computer that is ‘listening’ for the data actually receives and processes the transmission. Hubs are the ‘unintelligent’ relatives of switches. WARNING! Due to their internal architecture, repeater hubs MUST NOT be used in Ethersound™ networks. Switches There are different types of switches, using different protocols that interact with other protocols to provide all the necessary transmission services.
  • Page 54 NXES104 EXPANSION BOARD AND REMOTE CONTROL you will find descriptions of cables listed for reasons of completeness, but that are not suited for EtherSound networks. CAT5, 5e, 6, 7 cables Level 5 cable supports transmission rates of up to 100Mbps (200Mbps in full-duplex), CAT5e, even 1Gbps - is the most common today.

  • Page 55: Fiber Optic

    NXES104 EXPANSION BOARD AND REMOTE CONTROL order to protect the cable. Ideally this sleeve should halogen free in order to comply for the installation standards. Bellow is some various cables that have been seriously tested by Auvitran (see www.auvitran.com for more information). Cable Max.

  • Page 56: Installation Inside The Nxamp4X1

    NXES104 card. Slide the NXES104 board inside the rails, and push it firmly inside the NXAMP4x1. Then put the two screws back to fix the NXES104 on the rear panel of the NXAMP.

  • Page 57: Input Meters Choice

    NXES104 EXPANSION BOARD AND REMOTE CONTROL (1) Input meters choice Here you can choose between analog input meters or digital inputs (from Ethersound™ network) meters. Mixed mode is not accessible in this release. Click on the text corresponding to the input you wish to monitor. (2) Input meters Here you can see the input meters for the four channels selected above.

  • Page 58: Security

    NXES104 EXPANSION BOARD AND REMOTE CONTROL (4) Security This control is not accessible with this release: Security settings are not yet implemented . However, you can use the security settings from the ESmonitor software itself, allowing several users to have access to the Ethersound™ network with different level of security. Please refer to the ESmonitor User Manual for details.

  • Page 59: Virtual Front Panel

    N.B.: On some setups the ArrayEQ settings may be linked. (12) Virtual front panel This virtual front panel is a copy of the NXAMP4x1 user interface. You can see the LCD display and the front panel LEDs status. You can use all the push buttons and the encoder wheel by clicking with your mouse or using its wheel.

  • Page 60: Nxwin4 Software For Nxamp4X1 Firmware Upgrade

    • NXAMP4x1 remote control functions. WARNING! NXAMP4x1 Powered TDcontroller is delivered with a FLAT firmware only (no NEXO setup installed), so it is mandatory to upgrade the firmware of the unit to the last available firmware that you will find on our website.

  • Page 61: Ethersound™ Upgrade

    This port can be used to upgrade the NXAMP when a NXES104 board is fitted. You can either directly connect the computer to this port or reach the NXAMP4x1 through the Ethersound™ network. If several NXAMP are connected together in an Ethersound™...
  • Page 62 Ethernet port for the software to set up correctly. Then through the start menu, double-click on Programs> Nexo> Firmware Update> NXwin4. The Nexo loader will appear on the screen of the computer. Use the “Browse” button to select the firmware file (the extension is .dld).

  • Page 63: In Download Mode

    The Nx screen will display the revision of the boot loader, and then the following message will appear: Begin the upgrade You can now confirm the download in the splash screen. The Nxwin4 will detect the connected NXAMP4x1 target, and then download the appropriate software. PAGE 63 OF 80...

  • Page 64: Using The Controller After A Firmware Update

    Using the controller after a firmware update Choosing a cabinet setup After the download of a new firmware, the NXAMP4x1 powered TDcontroller will be by default in FLAT mode, it means that the audio flows from the inputs to the outputs without treatment.

  • Page 65: Technical Specifications

    TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS POWER SPECIFICATIONS FOR NXAMP4x1 Powered TDcontroller Number of channels 4 channels, 3 channels (2 non bridged + 1 bridged) or 2 channels (2 bridged) Max. output power (8 Ω) 600 W (non bridged) 1800 W (2 channels bridged) Max.

  • Page 66: Thermal Dissipation And Current Drawn

    2023 2ohms/ch 21.8 12.0 2126 1 BTU = 1,055.06 J = 0.252 kcal (W)*864=cal N.B. These values are for NXAMP4x1 without NXES104 board fitted. If card is fitted, please add 5 Watts to these values. Dimensions PAGE 66 OF 80...

  • Page 67: Application Note: Driving The Sub From The Aux Send

    It is then up to the user to adjust the delay on the NXAMP4x1 to match the physical path difference of the different systems. It is thus possible to get a well adjusted system, even without measuring instruments.

  • Page 68: Precautions & Check

    Before using the AUX send of your desk ensure that the outputs are in phase (you can feed a 100Hz signal at the input and monitor the MAIN and AUX on a dual trace scope) Always apply EQ or processing to all signals feeding the NXAMP4x1. So the phase relation is not affected.
  • Page 69 APPLICATION NOTE: DRIVING THE SUB FROM THE AUX SEND Never add additional low pass filtering on the SUB. (or high pass to the main system) Inverting polarity on one channel should always result in a massive difference near the crossover point. If the sound is more or less the same the system is no longer aligned. PAGE 69 OF 80...

  • Page 70: Appendix A : List Of Supported Presets (Load2_48)

    NXAMP. Please refer to the documentation enclosed with the firmware if the one loaded in your NXAMP is not LOAD 2_48. Keep in mind that you should hold the A & B buttons down when resetting the NXAMP4x1 Powered TD controller to switch from one family of setups to the other.
  • Page 71 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name PS15 StereoXover LS1200 PS15 Xov PS15 Xov + LS1200 Bridged PS15Wide Bridged LS1200 PS15 Wide + LS1200 Bridged PS15Xov Bridged LS1200 PS15 Xov + LS1200 Bridged 2 PS15 Ch 3 + 4 PS10 Wide PS10 Wide...
  • Page 72 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name PS10 StereoXover RS15 Omni 80Hz RS15 Omni 80Hz PS10 Xov RS15 PS10 Xov RS15 RS15 Omni 80Hz PS10 Stereo Wide RS15 Omni 80Hz PS10 Wide RS15 PS10 Wide RS15 RS15omni Bridged PS10 StereoXover...
  • Page 73 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name S830 Stereo Wide ALPHA S2 XOV GEO ALPHA S2 XOV GEO GEO S830 Wide GEO S830 Wide + S2 80Hz Stereo S830 StereoXover ALPHA S2 XOV GEO ALPHA S2 XOV GEO GEO S830 Xov GEO S830 Xov...
  • Page 74 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name GeoT Xover 75Hz GEO T4805 HF 75 GEO T4805 HF 75 GEO T4805 HF 75 GEO T4805 HF 75 HF (1-2-3-4) CD18 Cardio CD18 back 140 CD18 front 140 CD18 back 140 CD18 front 140...
  • Page 75 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name GeoSub 75-200Hz GEO SUB BACK 75-200Hz GEO SUB FRONT 75-200Hz (2 Bridged ch) GEOD 10 FRONT ACT. GeoD 3way Active GEOD 10 BACK Wide GEOD 10 HF ACT. Wideband Wide GEOD 10 FRONT ACT.
  • Page 76 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name GEO SUB FRONT 35- S1210 Active Xov GEO SUB BACK 35-200Hz GEO S1210 LF LF Xov GEO S1210 HF ACT. GeoSub 35-200Hz 200Hz S1210 Active Xov RS15 CARDIO Back 80Hz RS15 CARDIO front 80Hz GEO S1210 LF LF Xov...
  • Page 77 APPENDIX A : LIST OF SUPPORTED PRESETS (LOAD2_48) LOAD2_48 Setup List Output patch Setup Name S1230 Active Xov GEO S1230 LF Xov GEO S1230 HF ACT. (2 Bridged ch) S1230 ActiveWide GEO S1230 LF Wide GEO S1230 HF ACT. (2 Bridged ch) S1230 Active Xov CD18 back 85 CD18 front 85...
  • Page 78 Usable mains cord in Europe The SEMKO (CE) certification in Europe is based on the assumption that the user will use one of the following mains cord to use NXAMP4x4 or NXAMP4x1. Please choose one from the list bellow. NXAMP4x1...
  • Page 79 ROHS CERTIFICATE ROHS certificate PAGE 79 OF 80...
  • Page 80 USER NOTES User Notes Nexo S.A. Parc d’Activité de la Dame Jeanne F-60128 PLAILLY Tel: +33 3 44 99 00 70 Fax: +33 3 44 99 00 30 E-mail: info@nexo.fr www.nexo-sa.com PAGE 80 OF 80...

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