NXAMP4x1 & NXAMP4x4 Powered TDcontrollers Digital Patching Unit Digital Meters Unit NXES104 / NXDT104 User Manual v2.
FCC INFORMATION (U.S.A.) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! Compliance with FCC regulations does not guarantee that interference will not This product, when installed as indicated in the instructions contained in this occur in all installations. If this product is found to be the source of interference, manual, meets FCC requirements.
Power supply/Power cord • Only use the voltage specified as correct for the device. The required voltage is printed on the name plate of the device. • Use only the included power cord. • Do not place the power cord near heat sources such as heaters or radiators, and do not excessively bend or otherwise damage the cord, place heavy objects on it, or place it in a position where anyone could walk on, trip over, or roll anything over it.
XLR-type connectors are wired as follows (IEC60268 standard): pin 1: ground, pin 2: hot (+), and pin 3: cold (-). Use only Neutrik NL4 plugs for connecting Speakon connectors. NEXO-SA cannot be held responsible for damage caused by improper use or modifications to the device or data that is lost or destroyed. • 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.
TABLE OF CONTENT TABLE OF CONTENT FCC INFORMATION (U.S.A.) ............................................................................................................................................ 3 IMPORTANT SAFETY INSTRUCTIONS......................................................................................................................... 3 PRECAUTIONS.................................................................................................................................................
TABLE OF CONTENT (9) CHANNEL INDICATORS .......................................................................................................................................................17 (10) AIR INTAKES ....................................................................................................................................................................17 (11) SCREW HOLES FOR HANDLES ........................................................................................................
TABLE OF CONTENT CROSSOVER SECTION (6)......................................................................................................................................................... 38 POST PROTECTION EQ AND LOW PASS (27) (28) ...................................................................................................................... 38 GAIN SECTION (29).......................................................................................................................................
TABLE OF CONTENT HUBS .......................................................................................................................................................................................80 SWITCHES ................................................................................................................................................................................80 WIRELESS LAN.......................................................................................................
TABLE OF CONTENT ENABLING REMOTE CONTROL OF NXAMP WITH NXDT104 IN ESMONITOR™ .................................................................... 105 GRAPHICAL USER INTERFACE ................................................................................................................................................ 105 (1) DANTE ID SETUP .........................................................................................................................................................
TABLE OF CONTENT DMU TECHNICAL SPECIFICATIONS ........................................................................................................................129 DPU TECHNICAL SPECIFICATIONS..........................................................................................................................129 DMU DIMENSIONS..........................................................................................................................................................
NXAMP VERSUS NX242: WHAT’S NEW? NXAMP versus NX242: What’s new? The NXAMP Powered TDcontroller has been designed in order to provide ascendant compatibility with its predecessor – the NX242 Digital TDcontroller. What’s remaining the same? DSP core The DSP used in the NXAMP 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.
NXAMP VERSUS NX242: WHAT’S NEW? Computing resources The DSP resources have been multiply by 3.5 between the NX242ES4 and the NXAMP (so it means by 7 between the NX242 and the NXAMP). This will ensure that the NXAMP will have enough DSP resources to deal with many years of algorithm improvements. Other key components like CPU speed, memory quantities and so on have been also upgraded.
NXAMP VERSUS NX242: WHAT’S NEW? Ethernet port of a PC/MAC computer to any number of NXAMP with NXDT104 on the network. N.B.: Use LOAD3_11 or better for NXDT104 support. Optional DMU unit The DMU (Digital Meters Unit) is an optional 1U device that can be used together with the NXAMP powered TDcontroller to ease the metering of input channels. This unit provides 8 x level meters, one per analog input plus one per digital input from slot, plus status LEDs for network ports. N.B.
QUICK START 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. However please devote some attention to reading the user manual.
QUICK START Stand-by mode consumes slightly more current than in Power off mode, but allows the amplifier to be brought back from Stand-by to power on mode through remote control. The last LED, ‘Amp Protect’ reflects the protection status of the amplifier.
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). The ‘Peak’ LED will light to red to indicate that the peak limiter is working to protect the amplifier.
QUICK START Back panels description 7 4 3 1 2 6 5 (1) Mains connectors This is the mains input for the NXAMP. There is one mains plug on NXAMP4x1 and two mains plug on NXAMP4x4. • On 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. NXAMP4x1C). • On NXAMP4x4, the plugs are two Powercon 30A for the 100 ~ 120 Volts model (ref. NXAMP4x4U) or the 110 ~ 120 / 220 ~ 240 Volts model (ref.
QUICK START (3) Expansion slot This slot is used for extra audio inputs and remote control. See further in the manual for details about the available options. Since July 2009, all NXAMP4x1s and NXAMP4x4s are shipped with an expansion card fitted in, the NX-DFLT card. This card prevents output noises when main AC power feeding NXAMPs is brutally shutdown. NX-DFLT card should always be fitted in when no other expansion card is used.
QUICK START (6) GPIO port This GPIO port is used for interfacing the amplifier to security system, or to allow a basic remote control of the unit. NEXO DMU (Digital Meters Unit) device also connects here. (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.
QUICK START Select your cabinet set-up In the Options menu, choose Systm Config, and you will be able to choose among the different set-ups within the same cabinet family. (i.e. you don't have to modify the amplifier to cabinet wiring). Press All button and all setups will be available for selection. Using the amplifier without the TDcontroller functionality If you want to use the amplifier without the TDcontroller, just choose the “FLAT mode” setup.
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). The shipping weight of the NXAMP4x4 (U,C or Wversion) is nearly 30 Kg (66 lb). Because of the large size of the carton box it is recommended to manipulate the box with two persons. Open the box with care to prevent damage on the content.
SETTING-UP ADVICE Setting-Up Advice Earth connection WARNING! THIS APPLIANCE MUST BE EARTHED. The green and yellow wire of the mains cord must always be connected to an installation safety earth or ground. The earth is essential for personal safety as well as the correct installation of the system, and is internally connected to all exposed metal surfaces. Any rack framework into which this unit may be mounted is assumed to be connected to the same grounding circuit.
SETTING-UP ADVICE For the NXAMP4x4W this is slightly different; the unit is sensing the mains voltage on power up, and then will choose to boot either in “110 Volts” mode or “220 Volts” mode. Once the NXAMP4x4W has startup up in one of the two modes, it will be locked to the corresponding voltage range till next power up.
SETTING-UP ADVICE NXAMP4x1 rack holes position NXAMP4x4 rack holes position With NXAMP4x1, because of this layout, it is not possible to use some rack rails with 2 holes per rack unit (see picture bellow), because you will loose ½ U of rack space on the top and bottom of the amplifier. Thus continuous rack rails or with 4 holes per rack unit should be used.
SETTING-UP ADVICE Using the NXAMP without a rack If you do not put the NXAMP 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. Without these rubber pads, some internal components can be damaged when there is a shock (for example dropping the amplifier on a table). Fuses The fuses provided in the unit will not blow during normal operation.
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. This is not the case for most professional audio equipment.
SETTING-UP ADVICE NXAMP 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.
GENERAL DESCRIPTION GENERAL DESCRIPTION Global architecture NXAMP4x1 Global architecture The diagram bellow shows the global architecture of the NXAMP4x1 amplifier. NXAMP4x4 Global architecture The diagram bellow shows the global architecture of the NXAMP4x4 amplifier.
GENERAL DESCRIPTION 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. • On NXAMP4x1, two large power supplies are used, one for channel (1 and 2) and the other for channel (3 and 4). • On NXAMP4x4, four large power supplies are used, one for each channel.
GENERAL DESCRIPTION They all are full resonant type with half bridge converter. The ZCS (Zero Current Switching) design ensures high efficiency and low noise. Moreover, because the two converters work in opposite phase, some noise is cancelled; this is preferable for both sound quality and EMC (Electro magnetic compatibility).
GENERAL DESCRIPTION on…) from the expansion slot. These eight signals can be patched inside the DSP to any channel of processing/amplifying (see further for a block diagram of what is inside the DSP). All signals, audio or sense, use 24 bits converters. The CPU can also set up the analog input and output gain for each channel, thus ensuring that the dynamic range of the system is always optimized (regarding volume, gain, patch and bridge settings).
GENERAL DESCRIPTION NB: The routing from DSP channels (from 1 to 4 on the front panel) and the output speakon (from A to D on the back panel) is done automatically regarding setup configuration. See Input Patch menu further in the manual. You can see with the gray line on the above drawing that unused pins on output speakon are shorted together, but are not connected to ground. Therefore be careful as very high voltage might be present on these unused pins.
GENERAL DESCRIPTION • 4 x 5 Volts outputs • 8 x GND (ground) signals. The pin out of these signals is given bellow: It is mandatory to have a galvanic isolation between these signals and any another equipment. Thus, either the target equipment should present isolated GPIO system, or the signal should goes through small signal relays to guarantee that the NXAMP GPIO will be isolated from the other equipment.
GENERAL DESCRIPTION NEXO expansion slot form factor is not compatible with the Yamaha mini-YGDAI form factor. Thus, Yamaha mini-YGDAI card cannot be fitted inside NXAMP Powered TDcontroller. Since July 2009, all NXAMP4x1s and NXAMP4x4s are shipped with an expansion card fitted in, the NX-DFLT card. This card prevents output noises when main AC power feeding NXAMPs is brutally shutdown (ie power down at the end of the show before NXAMPs are switched off).
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.
BLOCK DIAGRAM DESCRIPTION Patching and routing (1) Basically, any combination of the four XLR analog inputs (numbered A to D on the back panel) can be patched to each channel of the amplifier. If an expansion board is fitted, the four added digital input (numbered E to H) can be mixed as well. In this patch section, digital gain is also added to optimized signal to noise on the audio path. N.B.
BLOCK DIAGRAM DESCRIPTION The high pass filters are also extremely important as they optimise excursion at very low frequency which is a very important safety factor. (Therefore do not use set-ups which are not designed for the cabinet you are using). Equalising wideband acoustical response (3) This wideband equaliser section achieves the correction required to obtain a flat system response, as the cabinets are acoustically designed for maximum efficiency on the whole frequency range.
BLOCK DIAGRAM DESCRIPTION The NXAMP 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).
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. That is why, as previous VCEQs deal with LF loudspeaker, another set of VCEQ is needed to protect HF driver from excessive displacement.
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. Without this, a rough and delayed gain variation would result which would be quite noticeable and unnatural.
MENU DESCRIPTION MENU DESCRIPTION The diagram bellow shows the internal structure of the menus accessible by the user from the front panel. Follow the arrow corresponding to the “A” or “B” button for each menu to enter the next one. NXAMP Startup Nothing pressed Options A+B pressed 1.Systm Config 2.Input Patch Choose Cabinet Setup 3.Save/Recall A Default Display B A Volume B A Delays B A Gains B A B A Array EQ B Headroom A 4.Security B 5.GPIO Mode 6.Load Monitor 7.
MENU DESCRIPTION 0. FLAT - NO PROTN. [4 ch amplifier] Y001 ~ ~ Changing Cabinet Family ~ 42. GeoD PA WB Back1-3 Front2-4 ~ In order to prevent end-user changing between different NEXO systems set-ups during use, the following procedure is recommended. This procedure has been purposely designed to avoid any mistakes. It is nevertheless very easy to change set-up among the same family or between families (see further, “System config”).
MENU DESCRIPTION Adjusting Volume The volume of each channel can be adjusted from the Volume menu (unit is dB). Bellow is a picture of this menu. The volume setting for each channel can always be clearly seen from the front panel surrounding LED (white/blue) around each mute button. The position of the LED gives the value of the volume, like it would be for a traditional analog volume pot. The picture bellow gives the attenuation value for each LED.
MENU DESCRIPTION NB: You can adjust large differences of gain between channels with the volume menu. There is no difference between gain and volume setting; this distinction is only done by analogy with traditional amplifiers. The CPU will always check gain, volume, patch and headroom settings and decide what the best combination is between analog or digital gain to optimize the dynamic range of the system. Adjusting Delay The delay of each channel can be adjusted from the Delay menu.
MENU DESCRIPTION The gain value can be read on the top of the LCD screen for each channel (unit is dB). To change the gain for a channel, select it first by pressing the corresponding ‘Select’ button. The channel name on screen will then be put between bracket (on picture above, CH2 is selected). Then turn the wheel to change the gain setting (from –6 to +6 dB). You can select multiple channels by pressing several ‘Select’ buttons at the same time.
MENU DESCRIPTION corresponding ‘Select’ button. The channel name on screen will then be put between bracket (see on the picture above, channel 2 is selected). Then turn the wheel to change the Array EQ setting (from – 6 dB to + 6 dB). You can select multiple channels by pressing several ‘Select’ buttons at the same time.
MENU DESCRIPTION With heavy content, like open air rock concert, you will need the full input range sensitivity. This is the most typical situation. In that case, the headroom should be adjusted to 0 dB.
MENU DESCRIPTION Note: Because same analog input signal can be routed to several outputs, it is always best to use same value of headroom on all channels, or to use separate analog input to various outputs (using link at the back of the amplifier if needed). Using different values of headroom on channels using same input can reduce or cancel the effect of the headroom. Note: Headroom effect is compensated on the digital inputs using digital gain.
MENU DESCRIPTION Turn the wheel to make your choice blink on the first line of the screen, then press the “B” button. Nexo config Select one speaker setup by turning the wheel till the setup number appears blinking on the LCD screen (in this example, you can toggle between the Crossover (Xover) and the Wide setup). Then depress the B button (OK). Once the setup is loaded, the amplifier will go back to the default screen.
MENU DESCRIPTION Custom config When entering the Custom config menu, the first display shows the current setup for the selected output (including speaker name, variant and crossover points(s) if available). You can display the current setup information for each output by depressing the corresponding ‘Select’ button. If you want to change a setup for one output, just press the ‘Edit’ button. First step is to select the Serie (i.e. family) by turning the wheel (for example here, the PS Serie).
MENU DESCRIPTION Once the bridge mode has been selected (or not in our example) you will be prompt to choose among various speaker mode if available. In the case of the PS15R2, the mode is either “Normal” or “MON” for Monitoring application. Let’s select the standard mode in this example. NB: if only one mode is available for the selected speaker, this step will be skipped. Now the latest part of this custom setup for a specific channel is to choose among the available crossover, when available.
MENU DESCRIPTION Now you can choose between one of the following solutions: Either you enter the other channel and setup the speaker you wish, or you can copy the setup from any channel to one, two or three other channels. To do this first keep the Select button down for the “Master” channel, the one that will be copied to the other channels. While this channel is kept down, press simultaneously the destinations channels.
MENU DESCRIPTION By depressing the cancel sign (‘x’) the display is now back to default mode; if the chosen setups are equivalent to a known “Nexo setup”, then the default display is the classical one, like displayed on the following picture: If the chosen setups does not match any of the NEXO four channels setups (including chosen crossover frequency) the display will show the speaker selected for each output.
MENU DESCRIPTION to have same signal feeding two channels of amplifier or more. In this situation, changing the patch for one channel will automatically affect the other channels. First step to change the input patch is to go to the OPTION menu (see above). Then select the sub-menu 2.Input Patch. The following menu displays the routing of the unit. Each Colum represents an output speakon, from A to D.
MENU DESCRIPTION Then a blank display is inserted, and the first display (routing to “PS10R2”) is displayed again. Now another example using the setup PS10R2 (2-4) and LS600 (1-3). In that case, the main and the sub are supposed to share the same speakon cable. The ‘Input Patch’ sub menu in the “Options” of the NXAMP will then display the following: Note that the position of the text shows that output speakon A (1rst column) and output speakon C (3rd column) should be used for connecting the LS600.
MENU DESCRIPTION Then a blank display appears to display clearly the limit between the two speakers’ parameters.
MENU DESCRIPTION And the loop can start again. NB: The ‘classical’ PS10R2 + LS600 setup also available allow using independent cable for each output if needed (Speakon A and B for 2 x LS600 and Speakon C and D for 2 x PS10R2). This was for displaying the routing for each channel. The user can edit the input patch for each channel simply depressing the select channel in front of the corresponding speakon.
MENU DESCRIPTION Any combination of input can be patched on each output. Be careful when patching both analog and digital input together to one channel: It is very unlikely that the two signals can be in phase. We recommend using this solution only for analog backup of digital network, meaning that only digital or analog inputs will be used at a time.
MENU DESCRIPTION Once the button “Save” has been pressed, you will be requested to enter the name for that user setup (default name is USERSET followed by the setup number). Starting from the first character, turn the wheel to choose a letter, and then depress the ‘Select 4’ (for “Next”) button to go to the next letter. Depressing button ‘Select 1’ (for “Prev”) will go back to the previous character. When the last letter has been reached, press the “B” button again to actually save the setup.
MENU DESCRIPTION At the end of the recall, the default display is shown on the LCD screen. Security The menu allows locking the local control or the remote control of the NXAMP. To access the Security menu, go to the Option menu, and select the sub-menu 4. Security (see above). When the local controls are LOCKED, the user can navigate into the menus but cannot change settings of the unit. However, the MUTE buttons are still working.
MENU DESCRIPTION To change either the local or the remote control access, press the corresponding ‘Select 2’ (for local control) or ‘Select 4’ (for remote control) button. If the password has not been entered yet, it will be asked now. Prev Password ? A_______ Control Next If the wrong password is entered, it will be displayed and you can then only go back to previous menu, which will be still in read-only.
MENU DESCRIPTION This menu allows choosing the way the GPIO are handled by the NXAMP Powered TDcontroller. There are currently 5 modes of GPIO which are described bellow. To change the current GPIO mode, press Edit (‘Select 4’ button) and turn the wheel up or down to the selected GPIO mode. Once done, press OK (‘Select 4’ button) to validate your choice. GPIO is set to MODE 0 GPIO Edit To put a GPI pin in the ‘High’ state, connect it to one of the ‘+5 Volts’ output on the GPIO DB-25 connector.
MENU DESCRIPTION Pin Name In/Out Meaning when set to 0 (Default) Meaning when set to 1 GPInput 1 In CH 1 unmuted CH 1 muted GPInput 2 In CH 2 unmuted CH 2 muted GPInput 3 In CH 3 unmuted CH 3 muted GPInput 4 In CH 4 unmuted CH 4 muted GPInput 5 In NXAMP is ON NXAMP is in Stand-by GPOutput 1 Out CH 1 no current out CH 1 current out GPOutput 2 Out CH 2 no current out CH 2 current out GPOutput 3 Out CH 3 no current out CH 3 current out GPOutput 4 Out CH 4 no current out
MENU DESCRIPTION Pin Name In/Out Meaning when set to 0 (Default) Meaning when set to 1 GPInput 1 In Power amp can start Do not start power amp GPInput 2 In Analog input unmuted Analog input muted GPInput 3 In Digital input muted Digital input unmuted GPInput 4 In Scene 1 is recalled Scene 2 is recalled GPInput 5 In NXAMP is ON NXAMP is in Stand-by GPOutput 1 Out Power amp has started Power amp not started GPOutput 2 Out Reflects the GPInput 2 status GPOutput 3 Out Reflects
MENU DESCRIPTION GPIO mode 3 (CP4SW simple remote mode) This mode is intended to be used with momentary ‘High’ signals (like push buttons). It is recommended to use the Yamaha CP4SW remote control panel for DME. Connect the button 1 to 4 to the GPI 1 to 4, and each LED to GPO 1 to 4.
MENU DESCRIPTION GPOutput4 is blinking each time a decrease volume command is received, and is ON when volume is set to min. GPOutput5 reflects the GPInput1 (with a small delay and without glitches). GPOutput6 reflects the GPInput2 (with a small delay and without glitches). GPOutput7 reflects the GPInput3 (with a small delay and without glitches). GPOutput8 reflects the GPInput4 (with a small delay and without glitches).
MENU DESCRIPTION GPOutput1 is ON when setup 1 has been recalled. GPOutput2 is ON when setup 2 has been recalled. GPOutput3 is ON when setup 3 has been recalled. GPOutput4 is ON when setup 4 has been recalled. GPOutput5 reflects the GPInput1 (with a small delay and without glitches). GPOutput6 reflects the GPInput2 (with a small delay and without glitches). GPOutput7 reflects the GPInput3 (with a small delay and without glitches). GPOutput8 reflects the GPInput4 (with a small delay and without glitches).
MENU DESCRIPTION If GPInput1 is ‘High’, Channel 1 will be muted. If GPInput1 is ‘Low’, Channel 1 will be unmuted. Front Panel mute/Unmute is still working. If GPInput2 is ‘High’, Channel 2 will be muted. If GPInput2 is ‘Low’, Channel 2 will be unmuted. Front Panel mute/Unmute is still working. If GPInput3 is ‘High’, Channel 3 will be muted. If GPInput3 is ‘Low’, Channel 3 will be unmuted. Front Panel mute/Unmute is still working. If GPInput4 is ‘High’, Channel 4 will be muted.
MENU DESCRIPTION Load Monitor This menu allows setting up the NXAMP impedance monitoring function, which allows to report (through its GPIO port of through the Ethersound network) if the speakers are correctly connected to the amplifier and ready to be used. This is particularly useful for safety installations where the status of the connected speakers should always be known, and any default in the audio chain should be reported.
MENU DESCRIPTION If external pilot tone is used (from the audio program sent to the NXAMP on its analog or digital inputs), be sure that the frequency selected here is as close as possible to the frequency of the pilot tone. (2) Internal HF burst generator level The level of the internal HF burst generator can be adjusted here. If the load monitoring function is not needed, or if external pilot tone is used, set the level to OFF.
MENU DESCRIPTION (7) Measured impedance The measured impedance of the channel selected in zone 6 is displayed here. The display is one of the following: 1) If the NXAMP is unable to measure the impedance of the speaker (for example channel is muted or no speaker connected, or no pilot tone at the selected frequency), “Z= ?? Ω” will be displayed (like on the picture above).
MENU DESCRIPTION To change the current delay unit, press Edit (‘Select 4’ button) and turn the wheel up or down to the selected unit. The available options are milliseconds (ms), meters or inches. Once done, press OK (‘Select 4’ button) to validate you choice. Dante Id This sub menu allows changing the Dante™ ID of the NXAMP. This menu is accessible only when a NXDT104 card is fitted into the expansion slot of the NXAMP.
INSTALLATION RECOMMENDATIONS Installation Recommendations Audio Chain Recommendations About « Loudspeaker Management Devices » The NXAMP’s factory delay presets are optimised to provide the best possible crossover between the MAIN SYSTEM and SUB systems. Optimum results are always obtained for strictly identical signals feeding simultaneously all the NEXO NXAMP Digital TDcontrollers.
INSTALLATION RECOMMENDATIONS (see example below) We recommend that the system is adjusted so that arrivals from MAIN SYSTEM array and SUB speakers are coincident at a fairly distant listening position (typically further than the mixing position). Geometrical alignment In the example below, r1 being the smaller distance from MAIN SYSTEM array to listener position, and r2 being the smaller distance from SUB to listener position, the distance difference is then r1–r2 (specified meters or feet).
INSTALLATION RECOMMENDATIONS displayed in the low-frequency range. 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.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER NXES104 expansion board, remote control and ASIO driver On the back panel of the NXAMP Powered TDcontroller there is a slot where the user can easily insert an expansion board to add digital inputs and remote control to the unit. Since July 2009, all NXAMP4x1s and NXAMP4x4s are shipped with an expansion card fitted in, the NX-DFLT card.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER (1) Ethersound™ IN Port This port features and Ethercon® connector. Use this type of connector to secure your Ethersound™ network from unwanted unplugs. This type of connector also ensures a longer life to the internal RJ45 contacts, because it preserves it from external traction. Use this port as an Ethersound™ IN port when connecting to an Ethersound™ network.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER connected, the right one (Activity) meaning that Ethernet frames are received. Various Ethersound™ devices description Here is a short reminder about various Ethersound™ devices. Mono-directional, non ES100 devices Simplest Ethersound™ devices are mono-directional, non ES100: These devices features two ports (ES IN and ES OUT) and can be only connected to mono-directional networks (64 channels of 24bits/48 KHz).
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER ES100/spkr devices The ES100/spkr implementation is a light implementation of the ES100 above: ES100/spkr is compatible only with mono-directional Ethersound™ network, and can only extract a maximum of four outputs. Ethernet Additional hardware Hubs A hub (also known as repeater) is a central connection point for computers on a startopology-based network.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER unlicensed frequency or, among others, infrared line of sight. Wireless access points (base stations) are connected to an Ethernet hub or server and transmit a radio frequency that can penetrate walls and other non-metal barriers. Roaming users can be handed off from one access point to another like, for example, in a cellular phone system. Wireless LANs are not suitable for EtherSound networks due to significant bandwidth limitations.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER WARNING! Do not use FTP cabling for live application. STP stands for Shielded Twisted Pair: Screen is made of copper braid. SFTP stands for Overall Braid + Foil Shielded Twisted Pair: Foil screen and braid shield. For all these cables, transmission characteristics are the same. The difference is the behavior with respect to electromagnetic interference. We recommend cabling that has a superior quality sleeve in order to protect the cable.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Fiber Optic Fiber Optic is similar to twisted pair but does not conduct electricity. It is used in situations where a network may suffer from environmental conditions (e.g. lightning), such as in LAN connections between buildings. Fiber optic is also very valuable where electronic emissions or electro-magnetic interferences may have an impact on the network, e.g. on particular factory floors.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER this specific version of the ESmonitor™ software. Please refer to the ESmonitor™ User Manual provided by Auvitran as a pdf file when installing the ESmonitor™ application on your computer. Once your Ethersound™ network is completed, you can access to the control page of the NXAMP Powered TDcontroller. Compatibility issues The table bellow sum up the remote control possibilities with various version of NXAMP firmware and ESmonitor™ software so far.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Here is now the full control page when using ESmonitor™ v3.18.0 and LOAD3_15. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 (1) Virtual front panel This virtual front panel is a copy of the NXAMP 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.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER (3) Standby button Pressing this button will put the NXAMP in standby mode: the large power supplies used by the power amplifiers are turned off, and the controller is put in a low power mode. Once in standby, the control page of the NXAMP in ESmonitor™ will become gray and all the controls are non working.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Select the group you wish to put the NXAMP in. You can group NXAMP4x1 and NXAMP4x4 into the same group. One NXAMP can be part of several groups (for example you can do a group with all units, and some smaller ones for specific applications). The remote control page of the group can be accessed if you press the “Group” tab in the left view of ESmonitor™.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER N.B.: Once a custom setup has been created, it can be stored into the NXAMP memory using the “Scene” function (see bellow). (8) Input Patch For each channel, you can see eight buttons corresponding to the eight available inputs (4 analog, from A to D, and 4 digital, from E to H). Click on the button to patch or unpatch an input. If the button is dark, it means that the input is patched, if not it is white. N.B.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER (14) ArrayEQ settings To adjust the ArrayEQ on one channel, use the arrows bellow the text box. You can also simply go to this control by utilizing the mouse wheel. N.B.: On some setups the ArrayEQ settings may be linked. (15) Headroom settings By using the arrows bellow the text box the Headroom value for one channel can be adjusted. You can also simply go to this control by utilizing the mouse wheel. N.B.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Now, if you press the “Channel 2 Mute” on the amplifier front panel or into ESmonitor™, the “Mute all” function will be copy back to the individual channel mute, except for the Channel 2 that you have just pressed: Channel 1 Channel 2 Mute All Channel 3 Channel 4 (18) Notes In this textbox you can take some notes of your choice. The text is saved on the computer, not on the NXAMP itself.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER ASIO to NXAMP In this mode the four digital inputs of the NXES104 board are not fed by an Ethersound™ compatible device on the IN our OUT port, but from a computer connected directly or through a LAN on the Remote ES100 port of the NXES104, running the ASIO streamer software. In that mode, the “Ethersound” title on the four digital input meters is replaced by “ASIO”, and the Ethersound™ I/O Patch of the NXAMP becomes unavailable.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER ASIO to NXAMP and Ethersound™ network This mode is similar to the previous one except that the four audio channels from the ASIO stream coming on the Remote ES100 port can be routed on the NXAMP on one hand but also forwarded on the Ethersound™ network on the other hand, thus feeding other amp on this network (these NXAMP should then be in ASIO mode OFF).
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Warning: Switching from a scene to another one is immediate and does not ask for any confirmation, even if the cabinet family or cabinet type is changed. Therefore take care when changing scene under live conditions. (23) Cabinet Setup Pressing the “Set” button in this control displays the list of the setups available into the memory of the NXAMP. By default only the setup from the same family are displayed.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER If you recall a setup from a different family, a confirmation window will appear to prevent any mistake. A key combination on the computer keyboard will be then required to confirm the selection. (24) Virtual front panel size In order to fit on smaller computer screen, you have the possibility to reduce the size of the virtual front panel to display all the control of the unit on screen.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER Installing the ASIO streamer The ASIO streamer is a piece of software designed by Auvitran and that can be downloaded from there website (www.auvitran.com). It works on Windows® based PC computer. This software will install: 1) A virtual soundcard ASIO driver (named “Auvitran ASIO”) on your computer with 2 or 4 audio outputs. Thus any ASIO host will have the possibility to output sound on this virtual soundcard.
NXES104 EXPANSION BOARD, REMOTE CONTROL AND ASIO DRIVER In Network audio device select the target NXAMP. This NXAMP should be connected to the LAN through its Remote ES100 port and should be in ASIO mode “To NXAMP” or “To NXAMP+ES”. Select the number of Inputs/Outputs with the I/O count setting. For NXAMP, this setting is either 2/2 (meaning 2 channels of audio out from the computer to the NXAMP) or 4/4 (meaning 4 channels of audio out from the computer to the NXAMP).
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL NXDT104 expansion board, Dante™ patching and remote control On the back panel of the NXAMP Powered TDcontroller there is a slot where the user can easily insert an expansion board to add digital inputs and remote control to the unit. Since July 2009, all NXAMP4x1s and NXAMP4x4s are shipped with an expansion card fitted in, the NX-DFLT card.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL Use this port as a Dante™ Primary port when connecting to a Dante™ network. (2) Network Ports Status LEDs The two LEDs next to the Primary port show the link/activity status of the Primary port. The two LEDs next to the Secondary port show the link/activity status of the Secondary port. (3) Dante™ Secondary Port This Port running at 100 Mb or 1 Gb (automatically selected) features an Ethercon® connector.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL implementation of Ethersound™ networks. Dante™ networks can be compared to a standard computer network. Dante™ is based on TCP/IP so a very large choice of devices can deal with Dante™ information just like standard network packets. Bellow is a few advices for correct Dante™ network implementation. Hubs A hub (also known as repeater) is a central connection point for computers on a startopology-based network.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL they will be used with the NXDT104 card. Use a small screwdriver to slightly separate the card from the NXAMP chassis, and remove it. Slide the NXDT104 board inside the rails, and push it firmly inside the NXAMP. Then put the two screws back to fix the NXDT104 on the rear panel of the NXAMP. NB: Keep the NX-DFLT card in a safe place as you would need to put it back if you decide to remove the NXDT104 board for some reason.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL Advanced option of the Dante™ controller Next tab (Device Status) shows some generic information on the devices like Name, Type (should be always Bklyn2 with NXDT104), the version of the Dante™ firmware (3.5.3 is the last and only one at the moment of writing), the IP address and Link Speed for each Primary and Secodary port. NB: When used in Switched mode (default mode), the Secondary Address and Secondary link speed is grayed.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL The IP address when the device is in auto configuration mode is 169.254.xxx.xxx whereas most of the time the local address when a local DHCP is used is 192.168.xxx.xxx or 172.16.xxx.xxx or 10.0.xxx.xxx. Next tab (Clock Status) will show you which device is the Master clock of the network.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL Dante™ protocol includes a network latency compensation ensuring all receivers patched on the same source will output audio at the exact same time, but this is only for receiver using the same receive latency. WARNING! We recommend to always set the same receive latency for all NXAMP on a Dante™ network. The default value is 1 ms which will fit most of cases, but the value can be lowered down to 0.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL network. WARNING! Switching from one link to the other can take up to a few seconds. During that time audio will be muted. NB: When redundant mode is used, the remote control data can go only through the Primary port. Thus is the link connected to this port fails, it will be no more possible to remote control the unit. A solution could be to send control data to the Remote port, thus ensuring that the remote control will still be available.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL NEXO provides in each revision of the NXAMP firmware the last version of the ESmonitor™ software that has been successfully tested with this firmware. It is recommended to use this specific version of the ESmonitor™ software. Please refer to the ESmonitor™ User Manual provided by Auvitran as a pdf file when installing the ESmonitor™ application on your computer. Once completed, you can access to the control page of the NXAMP Powered TDcontroller.
NXDT104 EXPANSION BOARD, DANTE™ PATCHING AND REMOTE CONTROL 1 We will not detail any of the controls that are common with the control page when NXES104 is used. Please see above in the manual the complete description of this user interface. (1) Dante ID setup Here you can see or adjust the Dante ID of the NXAMP. The Dante Id is used to easily address a device on a Dante™ network when used in conjunction with other Yamaha compatible equipment.
DMU DIGITAL METERS UNIT FOR NXAMP DMU Digital Meters Unit for NXAMP The Digital Meters Unit (DMU) is a 1U 19” accessory for NXAMP4x1 and NXAMP4x4 powered TDcontrollers. This device is intended to monitor the input level on the four analog inputs and the four network inputs (from an Ethersound™ or Dante™ network if expansion board is fitted) of the NXAMP powered TDcontroller. Network ports status can be monitored as well.
DMU DIGITAL METERS UNIT FOR NXAMP Network card fitted Network LEDs state OFF ON Toggle NXDT104 NXES104 No link No Link Link OK unused Activity Link or Activity Back panel description 1 2 3 (1) Network outputs These three RJ45 outputs are passively connected to the front panel Ethercon® connectors. A great care has been taken in PCB design to ensure a minimum loss on the signal path. The network data will always flow from front panel to back panel of the DMU even if it is not powered.
DMU DIGITAL METERS UNIT FOR NXAMP WARNING: NXAMP firmware should be at least LOAD3_11 for the DMU to work. If not, the DMU view meters won’t work. Connections and start up Be sure that the host NXAMP is disconnected from mains. Connect the four XLR-3 cables between DMU back panel XLR connector (from A to D) and the NXAMP analog inputs (marked A to D). If any network card is fitted, you will need also to connect the three RJ45 links between the DMU back panel RJ45 and the network card ports.
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DPU DIGITAL PATCHING UNIT FOR NXAMP DPU Digital Patching Unit for NXAMP The Digital Patching Unit (DPU) is a 1U 19” accessory for NXAMP4x1 and NXAMP4x4 powered TDcontrollers. This device is intended to set up automatically the power outputs of an NXAMP4x1 or NXAMP4x4 Powered TDcontroller to the correct pins on speakON® 4 and speakON® 8 connectors. Thus connecting any of the NEXO speakers is very straight forward.
DPU DIGITAL PATCHING UNIT FOR NXAMP Back panel description 1 2 3 (1) Mains connectors There are two mains connectors on the DPU. These two connectors lead to two fully redundant power supplies for redundancy purpose, meaning that the DPU can still work even if one main is missing or in the very unlikely case that a power supplies fails. Be sure to connect the two mains input to separate mains circuit to ensure maximum redundancy.
DPU DIGITAL PATCHING UNIT FOR NXAMP (3) RS232 port Connect this serial port to NXAMP RS232 port using a shielded crossover (null-modem) cable only (2 meters / 16 feet max) with female db9 connectors on each side. Bellow is the cable to be used to connect NXAMP to DPU pinout.
DPU DIGITAL PATCHING UNIT FOR NXAMP while booting up; it should be LOAD3_11 or above. After a few second the current selected speakers on the NXAMP are routed inside the DPU and their names are displayed on the DPU screens. DPU front panel connectors routing The front panel of the DPU is very symmetrical and shows two groups (one on grey background, the other one on black background), each with two SPK4 and one SPK8.
DPU DIGITAL PATCHING UNIT FOR NXAMP There is three kind of information displayed alternatively on the DPU screens. But the speakon to use is always indicated clearly with arrows next to the plug in use. (1) Speaker Name The speaker name is indicated next to each plug to be used. For example bellow for a set of PS15R2 (setup number 41 in LOAD3_15). You will notice that the second line of the display is used, meaning that the output is on the 2+/2- pair of each speakON® 4 connector.
DPU DIGITAL PATCHING UNIT FOR NXAMP For our Alpha example, the S2 and the B1-15 has no alternate information to display but the M3 output will show that 3+/3- pins are connected to the MF whereas the 4+/4- are connected to the HF speaker of the cabinet. (3) Amplifier channel The amplifier channel in use on each output is also shown alternatively with the displays above.
DPU DIGITAL PATCHING UNIT FOR NXAMP then a setup with PS10R2/LS400/PS8/LS600 should be recalled. Linking several DPU together With some speakers setup it could be useful to link several DPU together. For example with active setups, using NXAMP4x1 for HF and NXAMP4x4 for LF, or with GeoT setups, requiring more than one NXAMP to feed all channels, or with STM to feed a four way system using bridge amplifiers.
DPU DIGITAL PATCHING UNIT FOR NXAMP SPK8 To STM Stack SPK4 Link between DPUs PAGE 118 OF 140
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE NXwin4 software for NXAMP firmware upgrade Please check regularly on NEXO website (www.nexo-sa.com) for NXAMP Powered TDcontroller firmware upgrade. These upgrades are freely downloadable and can improve: • NEXO’s setup for cabinets (including new setups for new products). • NXAMP firmware functions. • NXAMP remote control functions.
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE NXAMP serial port pins 2 (RXD) 3 (TXD) 5 (GND) Other PC COM port pins NXAMP Receive NXAMP Transmit Signal ground Unused 3 (TXD) 2 (RXD) 5 (GND) Other NB: The serial port cable used to connect the DPU to the NXAMP is a null-modem cable: you can use it together with a USB to serial adapter to upgrade your NXAMP.
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE (2) Ethersound™ IN port 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 NXAMP through the Ethersound™ network. If several NXAMP are connected together in an Ethersound™ network, you can upgrade automatically one after the other. (3) RS-232 Serial port This port can be used with or without NXES104/NXDT104 board fitted inside the amplifier.
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE Using the NXwin4 software Use the Nxwin4_setup.exe to install the software on a Windows based computer. During the installation, there will be an option to upgrade the Ethersound™ API. This option will be checked by default if no Ethersound™ API is present on your computer or is obsolete, and will be unchecked if no update is necessary. We recommend leaving this option unchanged.
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE Then choose the serial port connected to the NXAMP Powered TDcontroller (note: only the detected and available serial ports appear in the list), and finally press the download button. The following splash window should pop up on screen: To upgrade the NXAMP (fitted with NXES104 or NXDT104 board) through the network, choose the network port interface and select the network card connected to the NXAMP(s).
NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE At the end of the download the NXAMP will start up normally, displaying the new firmware revision. Using the controller after a firmware update Choosing a cabinet setup After the download of a new firmware, the NXAMP powered TDcontroller will be by default in FLAT mode, it means that the audio flows from the inputs to the outputs without treatment.
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NXAMP TECHNICAL SPECIFICATIONS NXAMP TECHNICAL SPECIFICATIONS POWER SPECIFICATIONS FOR NXAMP Powered TDcontroller Number of channels 4 channels, 3 channels (2 non bridged + 1 bridged) or 2 channels (2 bridged) NXAMP4X1 Max. output power (8 Ω) NXAMP4X4 600 W (non bridged) 1900 W (non bridged) 1800 W (2 channels bridged) Max. output power (4 Ω) 900 W (non bridged) 6600 W (2 channels bridged) 3300 W (non bridged) 2600 W (2 channels bridged mode) 8000 W (2 channels bridged) Max.
NXAMP THERMAL DISSIPATION AND CURRENT DRAWN NXAMP Thermal dissipation and current drawn Test signal: Pink Noise, bandwidth limited 22Hz to 22 kHz. All channels driven. NXAMP4X1 Line Current (A) 120V Idle 8ohms/ch 1/8out 4ohms/ch 2ohms/ch NXAMP4X4 230V 1.6 11.1 16.7 21.8 0.9 6.1 9.2 12.0 Line Current (A) 120V Idle 8ohms/ch 1/8out 4ohms/ch 2ohms/ch 230V 2.3 26.0 40.0 50.0 1.3 14.3 22.0 27.
NXAMP DIMENSIONS NXAMP Dimensions NXAMP4X1 front view dimensions NXAMP4X4 front view dimensions NXAMP4X1 and NXAMP4X4 top view dimensions PAGE 128 OF 140
DMU TECHNICAL SPECIFICATIONS DMU TECHNICAL SPECIFICATIONS Meters features Integrated vue-meters 8 channels of 8 levels vue-meters, one per input (4 x Analog and 4 x Network) Network activity 2 Leds per network input Front panel features Analog audio connectors 4 x Neutrik XLR-3 with parallel output link on XLR-3, named from A to D Network connectors 3 x Neutrik Ethercon connectors, named from 1 to 3 Back panel features Analog audio connectors 4 x Neutrik XLR-3 passive connection to front panel XLR
DMU DIMENSIONS 44 50 DMU Dimensions 480 DMU top and front view dimensions in mm 44 248 DPU Dimensions 480 DPU top and front view dimensions in mm PAGE 130 OF 140
NXES104 & NXDT104 TECHNICAL SPECIFICATIONS NXES104 & NXDT104 TECHNICAL SPECIFICATIONS NXES104 NXDT104 Compatible networks Ethersound™ netwokrs Dante™ networks Network type Ethernet 100 Mb TCP/IP over Ethernet, 100 Mb or 1 Gb Device addressing Automatic, based on MAC address Automatic, based on IP address with Zeroconf Number of channels 4 channels from network to NXAMP 4 channels from network to NXAMP Resolution / Sample Rate 24 bits / 48 KHz 24 bits / 48 KHz Latency 0.10 ms 0.
APPLICATION NOTE: DRIVING THE SUB FROM THE AUX SEND Application Note: Driving the Sub from the AUX send It is quite common to use the AUX send of a mixing desk to drive the Sub section of a PA system. This gives the mixing engineer more flexibility to set the level of its subbass relative to the main PA, apply special effects, use a different EQ on the Sub…However, it also rises some serious issues for the performance & safety of the system (mostly time alignment).
APPLICATION NOTE: DRIVING THE SUB FROM THE AUX SEND Consider the simple example of the AUX signal passing through a digital device (without processing) that is adding a delay of 2ms due to its conversion time. The AUX is then sent to a CD12 sub while the MAIN is send to the S850 rig. The first graph display the phase around the crossover point (85Hz in this case). The two overlapping phases are those of the CD12 and S805 as they should be. The bellow curve is the same as the above one with a 2ms delay.
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.
APPENDIX A: LIST OF SUPPORTED PRESETS (LOAD3_15) Appendix A: List of Supported presets (LOAD3_15) Please see the LOAD3_15_4ch_setups_list.pdf included in the documentation to see a complete list of four channels presets supported in LOAD3_15 by the NXAMP powered TDcontroller. Please see the LOAD3_15_speakers_setups_list.pdf included in the documentation to see a complete list of the various modes and crossovers available for each speakers of each family in the LOAD3_15.
APPENDIX B: HOW IS MEASURED THE AMPLIFIER POWER? Appendix B: How is measured the amplifier power? This part of the document describes the setup we have used to measure the power available on the NXAMP Powered TDcontroller outputs for each load (8, 4 and 2 Ohms).
APPENDIX B: HOW IS MEASURED THE AMPLIFIER POWER? measure directly the output voltage on the screen. Precision of the measurement • All the measurement tools (Digital scope and distortion analyzer) have been recently calibrated (less than one year).
USABLE MAINS CORD IN EUROPE 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 PLUG CORD CONNECTOR WELL SHIN WS-010 WELL SHIN H05VV-F 3G 1.0mm² WELL SHIN WS-002-1 WELL SHIN WS-010A WELL SHIN H05VV-F 3G 1.0mm² WELL SHIN WS-002-1 LONGWELL LP-33 LONGWELL H05VV-F 3G 1.
ROHS CERTIFICATE ROHS certificate PAGE 139 OF 140
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.
