Yamaha Nexo NXAMP4X4 User Manual Download Page 87

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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).

General description of the setup

The drawing bellow shows the setup used to measure the output power:

& Kjær

Audio Generator

with

Distortion Analyzer

Digital Scope

NXAMP Under Test

4x Dummy

Loads

The Audio Generator with distortion analyzer is used to generate test signals. It analyzes

the output of the amplifier to measure the THD+N, thus we can know when we reach the

clip of the amplifier with a certain value of distortion (typically 1 %).

The NXAMP under test is powered through a monitored power supply with voltage adjusted

to 230 Volts (+2/- 0 Volts) and 50 Hz.

The 4 analog inputs of the NXAMP Powered TDcontroller are linked together so all the

channels are fed. DSP setup is “FLAT – NO PROTN”, meaning that no EQ or gain is applied

and that only the amplifier protections are working. The volume is set to 0 dB attenuation.

Each output of the amplifier is connected to a dummy load (8, 4 or 2 Ohms). On one

channel, we loop the voltage back to the distortion analyzer and to a digital scope, to

PAGE 87 OF 91

Summary of Contents for Nexo NXAMP4X4

Page 1: ...NXAMP4X1 NXAMP4X4 Powered TDcontrollers User Manual v1 7 LOAD2_52 ...

Page 2: ......

Page 3: ...f you can not locate the appropriate retailer please contact the After Sales department of NEXO SA Parc d Activité du Pré de la Dame Jeanne B P 5 60128 PLAILLY The above statements apply ONLY to those products distributed by NEXO SA or its subsidiaries This applies only to products distributed in the United States of America IMPORTANT SAFETY INSTRUCTIONS 1 Read these instructions 2 Keep these inst...

Page 4: ...ou are not using the product for a long time make sure to unplug the power cord from the wall AC outlet If this device is to be mounted in an EIA standard rack leave the back of the rack open and make sure that it is at least 10 cm away from walls or surfaces Also if this device is to be mounted with devices that tend to generate heat such as power amplifiers be sure to keep an adequate gap betwee...

Page 5: ...LLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or colored GREEN or GREEN and YELLOW The wire which is colored BLUE must be connected to the terminal which is marked with the letter N or colored BLACK The wire which is colored BROWN must be connected to the terminal which is marked with the letter L or colored RED This applies only t...

Page 6: ...TION 4 IMPORTANT NOTICE FOR THE UNITED KINGDOM 6 COMPLIANCE INFORMATION STATEMENT DECLARATION OF CONFORMITY PROCEDURE 6 EUROPEAN MODELS 6 TABLE OF CONTENT 6 NXAMP VERSUS NX242 WHAT S NEW 11 WHAT S REMAINING THE SAME 11 DSP CORE 11 LEVEL AND LATENCY 11 SOFTWARE 11 WHAT S CHANGED 11 INTEGRATED AMPLIFIER 11 COMPUTING RESOURCES 12 FOUR SEPARATE INPUTS 12 POWER SUPPLY 12 ETHERSOUND OPTIONAL BOARD 12 US...

Page 7: ...AMPLIFIER WITHOUT THE TDCONTROLLER FUNCTIONALITY 19 BACK TO DEFAULT 19 AUTO SAVE 19 ENTER THE DOWNLOAD MODE 19 WHAT S INSIDE THE CARTON BOX 20 SETTING UP ADVICE 21 EARTH CONNECTION 21 MAINS SETTING 21 MOUNTING THE NXAMP IN A RACK GROUNDING SHIELDING SAFETY ISSUES 22 USING THE NXAMP WITHOUT A RACK 23 FUSES 23 ELECTROMAGNETIC ENVIRONMENTS 23 ANALOGUE INPUT SIGNAL CABLES 24 NXAMP POWER OUTPUTS WIRING...

Page 8: ...36 INTERCHANNEL REGULATION 19 37 AMPLIFIER PEAK CURRENT LIMITER 20 37 AMPLIFIER INTEGRATE CURRENT LIMITER 21 37 AMPLIFIER PEAK VOLTAGE LIMITER 22 37 AMPLIFIER SHORT CIRCUIT DETECTOR 24 37 MENU DESCRIPTION 38 CHANGING CABINET FAMILY 38 ADJUSTING VOLUME 39 ADJUSTING DELAY 40 ADJUSTING GAIN 41 ADJUSTING ARRAY EQ 42 ADJUSTING HEADROOM 42 HEADROOM CONCEPT 43 OPTIONS MENU 44 SYSTEM CONFIG 45 INPUT PATCH...

Page 9: ...AY UNIT 69 5 SECURITY LOCK 69 6 GROUP 69 7 INPUT PATCH 70 8 OUTPUT METERS 71 9 MUTE BUTTON 71 10 VOLUME CONTROL 71 11 GAIN CONTROL 71 12 DELAY SETTINGS 71 13 ARRAYEQ SETTINGS 71 14 HEADROOM SETTINGS 71 15 AMPLIFIER STATUS 71 16 OVERMUTE 72 17 NOTES 73 18 LOCATION 73 19 ALIAS 73 20 HARDWARE AND FIRMWARE 73 21 SCENE 73 22 CABINET SETUP 74 23 VIRTUAL FRONT PANEL SIZE 74 NXWIN4 SOFTWARE FOR NXAMP FIRM...

Page 10: ...N BETWEEN THE AUX AND MAIN OUTPUT OF YOUR DESK 83 WHY IT IS UNLIKELY THE AUX AND MAIN HAVE THE SAME PHASE 83 CONSEQUENCES OF BADLY ALIGNED SYSTEMS 83 PRECAUTIONS CHECK 84 APPENDIX A LIST OF SUPPORTED PRESETS LOAD2_52 86 APPENDIX B HOW IS MEASURED THE AMPLIFIER POWER 87 GENERAL DESCRIPTION OF THE SETUP 87 PRECISION OF THE MEASUREMENT 88 MEASUREMENT METHOD 88 USABLE MAINS CORD IN EUROPE 89 ROHS CERT...

Page 11: ...l NXES104 board the NXAMP has the same gain and delay from digital input to analog output than NX242 ES4 with traditional 26dB amplifier Please note however that both NX242 and NXAMP should have the same firmware revision LOAD to be phase compatible inside a same setup Software Basic MENUs and functions are more or less the same only little learning curve is needed to go from the NX242 to the NXAM...

Page 12: ...ll power supply is used for powering the TDcontroller digital board and to initiate the power amp The other big power supplies are used for power amplifiers On NXAMP4X1 channels 1 2 on one power supply and for channel 3 and 4 on the other one On NXAMP4X4 each channel has its own large power supply These large power supplies are precisely tailored to work around a precise Mains voltage so separate ...

Page 13: ...itch in the upper position to turn the power on Put it down to power the amplifier off Please note that even in the Off position high voltage is still present in some part of the amplifier as long as it is connected to mains Even if it is in the Off position the amplifier will consume a minimal current If you plan to use remote control to turn the amplifier On or Stand by then you must first turn ...

Page 14: ...e two buttons are used most of the time to navigate through the menus However depending on the LCD display they can be used for a specific purpose Anytime pressing the two buttons simultaneously will instantly enter the Volume menu allowing the user to adjust the volume for each channel using the encoder 6 Volume indicators These surrounding LEDs will indicate the position of the volume control fo...

Page 15: ...ak limiter is working to protect the cabinet or the amplifier 10 Air intakes The NXAMP uses forced air cooling The variable speed cooling fan draws air in from the front and exhausts it through the rear Please be sure that you do not block the air intakes or exhaust vents Please be sure not to mix inside the same rack amplifiers with opposite air flow 11 Screw holes for handles These four screw ho...

Page 16: ...owercon 30A for the 100 120 Volts model ref NXAMP4X4U and two Powercon 20A for the 220 Volts model ref NXAMP4X4C The amplifier requires high power so that it can demand high current from the AC service Connections must be properly rated for reliable operation See specification part for details 2 Balanced audio inputs with link For each of the four analog audio inputs you will find an XLR3 female i...

Page 17: ...utput routing is always done this way for 4 channels mode 1 1 2 2 Speakon A Speakon B 1 1 2 2 CH1 CH2 1 1 2 2 Speakon C Speakon D 1 1 2 2 CH3 CH4 Please note the symmetry between speakon A B and C D Also you can notice that Speakon B is always reverse of Speakon A and same for D and C In LOAD2_52 the output routing is always done this way in bridge mode 1 1 2 2 Speakon A Speakon B 1 1 2 2 CH1 CH1 ...

Page 18: ... Simultaneously depressing A B buttons at power up or during device RESET accesses the system change menu Keep the A B Buttons held until Load revision disappears from screen approx 2 seconds This will allow the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and press B to load the required settings 42 GeoD PA WB Back1 3 Front2 4 OK Select your ca...

Page 19: ...ome functionality like volume control input patching mute delay gain and ArrayEQ are working Remote control can be used as well Back to default Startup the amplifier with the select 1 button down and you will have the possibility to reset the settings to default except if the local controls have been locked see further Auto save The current set up is automatically saved three seconds after the las...

Page 20: ...mended to manipulate the box with two persons Open the box with care to prevent damage on the content Inside you will find 1 x NXAMP Quick start guide 32 pages 7 languages 4 x Rubber pad 1 x NXAMP Powered TDcontroller with NX DFLT card fitted 1 x Mains cord for NXAMP4X1 or 2 x Mains cord for NXAMP4X4 N B The provided mains cord is Chinese type for NXAMP4X1C or NXAMP4X4C 220 240 Volts version and U...

Page 21: ...ers exists under two references for each model NXAMP Reference Mains Voltage Mains current NXAMP4X1U 100 to 120 Volts Max 20 Amps NXAMP4X1C 220 to 240 Volts Max 10 Amps NXAMP4X4U 100 to 120 Volts Max 2x 30 Amps NXAMP4X4C 220 to 240 Volts Max 2x 16 Amps Each model applies to various safety standards only when use with the correct mains voltage Therefore the amplifier won t start or will stop workin...

Page 22: ...y 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 A low impedance networ...

Page 23: ...provided in the unit will not blow during normal operation If one of the fuses blows it means that the Powered TDcontroller has malfunctioned This fuse must only be changed by NEXO certified service personnel In any case do not replace the fuse with a non certified NEXO fuse as this will invalidate the NEXO warranty CAUTION This servicing instruction is for use by qualified service personnel only ...

Page 24: ... for instance a mixer see figure bellow You can see that the TDcontroller provides a low impedance path between pin 1 of its XLR connectors and its chassis The 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 cre...

Page 25: ...in relation to the load resistance and the cable length Too small a cable section will increase both its serial resistance and its capacitance this reduces the electrical power delivered to the loudspeaker and can also induce response damping factor variations For a serial resistance less or equal to 4 of the load impedance damping factor 25 the maximum cable length is given by Lmax Z x S S in mm2...

Page 26: ...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 PAGE 26 OF 91 ...

Page 27: ...iting 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 They all are full resonant type with half bridge converter The ZCS Zero crossing switches PAGE 27 OF 91 ...

Page 28: ...r the input signal is 28 dBu 55 Volts peak to peak The pin out of the input XLR is given bellow Control block The control block contains several sub block that are detailed bellow The plain lines show the audio or sense signal sense are voltage or current signal measured at the output of each amplifier The dashed lines show the digital communication signal among several block You can see the audio...

Page 29: ...at the following address http www yamahaproaudio com topics leading_technology learn_more_about_eeengine index html Power outputs block 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...

Page 30: ...om a PC computer But it could also be used in the future for local communication with other equipments The pin out is given bellow The RxD pin is the Receive data pin from the NXAMP point of view Thus this is an input The TxD pin is the Transmit data pin from the NXAMP point of view Thus this is an output GND is the ground A crossover cable connecting RxD pin of NXAMP to TxD pin of computer and so...

Page 31: ... user to simply fit an expansion board into the amplifier At the moment the only expansion board available is the NXES104 Ethersound board compatible with the ES 100 standard offering full remote control from a computer running 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 Yama...

Page 32: ...ESCRIPTION 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 32 OF 91 ...

Page 33: ...ts are part of the factory set ups and are necessary to time align the corresponding cabinet that is selected User set up delay The user can adjust the delay for each channel see further about the delay menu or delay setting from the ESmonitor The maximum delay allowed is 66 6 meters per channel N B This user delay will be added to the converter latency DSP buffering latency and factory set up del...

Page 34: ...equaliser set allows acting on a specific driver after the crossover rather than on the wideband section This allows to EQ one driver without affecting the others cleaning out of band response fine tuning in a crossover All the parameters are factory set Last generation of NXSTREAM algorithm are also implemented in this section This process uses sophisticated DSP program to go beyond the limits of...

Page 35: ...tage sense input signal is sent to a shaping filter producing a signal whose instantaneous amplitude is proportional to the voice coil excursion this is Global displacement block 7 This signal after rectification is compared to a preset threshold matching the maximum usable value as determined from laboratory measurements Any part of the signal exceeding the threshold is sent to the VCEQ control b...

Page 36: ...r is used here each with a separate set of threshold ratio attack and release Temperature control 16 17 The sense signal from amplifier output is fed into a shaping filter each one producing a signal proportional to the instantaneous current flowing into the voice coil of the transducer After rectification this signal is integrated with attack and release time constants equivalent to the thermal t...

Page 37: ...cancel that effect by linking VCAs together When the protection is activated on one channel and reaches a predetermined threshold the regulation section begins to correct the balance between the different channels HF MF and LF by acting on the concerned VCA Amplifier peak current limiter 20 To prevent over current on the output of the amplifier this peak current limiter is implemented leading to a...

Page 38: ...room A B B Default display is the display of the current setup number each setup has a unique number inside for each LOAD revision and setup name see picture bellow After two minutes of inactivity the display will go back to the default display 0 FLAT NO PROTN 4 ch amplifier Changing Cabinet Family In order to prevent end user changing between different NEXO systems set ups during use the followin...

Page 39: ...ppropriate setup by pressing OK button B or press the button A to go back to current setup without changes N B You can reset the unit without powering off by simultaneously repressing buttons A B SELECT CH1 at the same time for at least 3 seconds N B The setup number is blinking when the currently displayed setup is different from the one running into the DSP at the moment Note Selecting a new fam...

Page 40: ...ill increase the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time 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 NXAMP powered TDcontroller NB You can adjust small differences ...

Page 41: ...en 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 Then turn the wheel to change the gain setting from 6 dB to 6 dB You can select multiple channels by pressing several select buttons at the same time When a selected channel reaches the maximum value it will cease...

Page 42: ... by continuing to turn the wheel but other selected channels may still increase the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time In some special circumstances cardioids setups for example it is mandatory to have same Array EQ settings on two or more channels Then changing the Array EQ on one of these channels will automatical...

Page 43: ...ge sensitivity This is the most typical situation In that case the headroom should be adjusted to 0 dB Analog input level control 24 Bits ADCs Analog A Analog B Analog C Analog D Digital Signal Processor 24 Bits DACs Analog Outputs level control Amp ch1 Input Amp ch2 Input Amp ch3 Input Amp ch4 Input Default headroom position 0 dB situation Max input level Max Output Level Example above shows larg...

Page 44: ...0 dB which is the safest position 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 effe...

Page 45: ... 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 If you don t want to change the current speaker setup simply press the A button Back If you want to recall a setup from another family you should first go to the last setup of the current family meaning that the setup ...

Page 46: ... patch is to go to the OPTION menu see above Then select the sub menu 2 Input Patch Then the following menu depends if you have a digital input card fitted into the expansion slot of the NXAMP If not then the next menu will directly appear If yes you will be prompt to select whereas you want to edit the analog input patch or the digital input patch Choose Input patch to edit InPatch Analog Digital...

Page 47: ... available too These digital inputs are named DIGI_E for Digital Input E DIGI_F for Digital Input F DIGI_G for Digital Input G and DIGI_H for Digital Input H Bellow is in example of digital patch if digital inputs have been selected in the previous menu DIGI_E DIGI_F DIGI_G DIGI_H InPatch PS15 In both cases analog or digital if one of the inputs is between brackets it signifies that the input is c...

Page 48: ...r simply by directly pressing the corresponding Select button for another channel then the name of that channel will appear on the bottom line of the LCD screen in front of the channel select button Save recall user setups User setups contain all the settings of the NXAMP Powered TDcontroller so you can consider that a user setup is a snapshot of the amplifier state To access the Save recall menu ...

Page 49: ... the settings are saved the unit will go back to the default screen but the scene number will be displayed on top right corner of the LCD screen as shown on the picture bellow 104 PS10R2 NXS XO2 4 Scene29 LS600 1 3 NB If settings are manually changed regarding the recalled scene the scene number will disappear from the default menu If settings are adjusted back to the saved value of the scene the ...

Page 50: ...ose Yes to go on with recalling this is button Select 4 or No to go back to the previous screen 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 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 ...

Page 51: ...ntered yet it will be asked now Password Control Prev A_______ 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 If the good password is entered you then either go back and edit the previous menu press Select 4 or change the current password press Select 1 In this last situation you will need to enter the new ...

Page 52: ... Only direct connection is authorized between NXAMP when they are located in the same rack GPIO mode 0 OFF mode In this mode the GPIO port is turn off this is the default mode All the Outputs are set to 1 5 Volts and all the Inputs are unused GPIO mode 1 Basic remote control mode This mode is intended to be used with permanently High or Low state signals There is an action depending on the state o...

Page 53: ...als A state is validated when the state of the pin has changed and is stable for 1 second There is an action depending on the state of each GPI Here is the detail GPInput1 Sequential start up input pin GPInput2 Analog inputs mute unmute GPInput3 Digital inputs mute unmute GPInput4 Change from Setup 1 to Setup 2 GPInput5 ON Stand by function GPOutput1 Sequential start up output pin GPOutput2 Analog...

Page 54: ...4 to the GPI 1 to 4 and each LED to GPO 1 to 4 Here is the detail GPInput1 ON Stand by function impulse input GPInput2 Increase volume impulse input GPInput3 Mute unmute or att impulse input GPInput4 Decrease volume impulse input GPInput5 Mute or attenuator mode selector GPOutput1 ON Stand by status GPOutput2 Max volume reached status GPOutput3 Global mute or attenuator status GPOutput4 Min volume...

Page 55: ... to the GPI 1 to 4 and each LED to GPO 1 to 4 Here is the detail GPInput1 Select preset 1 impulse input GPInput2 Select preset 2 impulse input GPInput3 Select preset 3 impulse input GPInput4 Select preset 4 impulse input GPInput5 not used GPOutput1 Select preset 1 status GPOutput2 Select preset 2 status GPOutput3 Select preset 3 status GPOutput4 Select preset 4 status GPOutput5 Select preset 1 imp...

Page 56: ...t glitches GPOutput7 reflects the GPInput3 with a small delay and without glitches GPOutput8 reflects the GPInput4 with a small delay and without glitches Warning If a setting is changed on the NXAMP unit through front panel or remote control the LED will not turn off and if the corresponding button is pressed again the originally saved setup will be recalled Miscellaneous options This menu will a...

Page 57: ...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 Phase relation between the two feeds is aligned with proper measurement tools Easera Systune...

Page 58: ...in time delay specified in seconds apply t r1 r2 C r1 and r2 in meters C sound speed 343 m S The delay parameter is set in MENU Delay See above However it is a safe practice to double check geometrical alignment with a proper acoustical measurement tool 1200 mm 47 24 750 mm 29 53 750 mm 29 53 1200 mm 47 24 750 mm 29 53 750 mm 29 53 1200 mm 47 24 750 mm 29 53 750 mm 29 53 r2 r1 Measuring and aligni...

Page 59: ...lignment 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 Phase alignment can be considered as correct when phase is coincident over the entire overlapping range typically an octave from 60 Hz to 120 Hz and when the overall response is always superior to SUB s and MAIN SYSTEM s individual response PAGE ...

Page 60: ...00 version This board offers 4 digital inputs chosen among the 2 x 64 Channels of 24 bits 48 KHz audio data of the Ethersound frame and also remote control of the unit through the PC based application ESmonitor 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 NX...

Page 61: ...unplugs This type of connector also ensures a longer life to the internal RJ 45 contacts because if preserves it from external traction Use this port as an Ethersound OUT port when connecting to an Ethersound network 4 Remote ES100 port The ES100 is an upgrade of the original Ethersound standard It offers new functionalities but can also be downgraded to standard Ethersound network for compatibili...

Page 62: ...nd only audio data can be exchanged between devices With ES100 devices can send non audio data between them without passing through the remote control computer Ring topology Instead of the classical daisy chain Ethersound network you can now connect the last OUT port of the network to the IN port of the primary master that has to be defined as the Preferred Primary Master through ESmonitor every o...

Page 63: ... processing because less analysis of the frame is required As the EtherSound protocol contains exclusively layer 2 information switches other than layer two must not be used WARNING Layer 3 and Layer 4 switches are not compatible with the Ethersound networks Only Layer 2 switches can be used These layer 2 switches can be either managed or unmanaged Managed switches are necessary to set up VLAN net...

Page 64: ...ories Horizontal cable also called solid cable is made of plain copper conductors and has a low characteristics shift with aging It must be used for long runs of steady cabling typically the cables inside walls and ceiling Patch cable also called stranded cable more flexible is made of stranded copper conductors and has larger losses and characteristics shifts than horizontal cable It can be used ...

Page 65: ... shield White CAEGROUPE AudioLan FTP 85 m 75 m Really smooth ruggedized cat5e Look like a mic Cable a little bit hard to mount on RJ45 at the beginning Black CAEGROUPE AX CA23653 S FTP 140m 120 m Ruggedized Cat5e cable really good for exteriors SFTP One shield fold per pair Green CAEGROUPE Giga Audio S FTP 140m 120 m Ruggedized Cat5e cable very good live cable SFTP One shield fold per pair Black D...

Page 66: ...nectors must be used Installation inside the NXAMP To install the NXES104 card inside an NXAMP Powered TDcontroller first remove the two screws on each side of the NX DLFT card on the rear of the amplifier Keep these screws as they will be used with the NXES104 card Use a small screwdriver to slightly separate the card from the NXAMP chassis and remove it Slide the NXES104 board inside the rails a...

Page 67: ...cess 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 ESmonitor Software Revision NXAMP firmware revision Esmonitor before v3 5 Esmonitor v3 5 to v3 7 Esmonitor v3 8 to v3 9 3 LOAD2_46 to LOAD2_51 No control Limited control Limited control LOAD2_52...

Page 68: ... push buttons and the encoder wheel by clicking with your mouse or using its wheel 2 Input meters Here you can see the input meters of the NXAMP The channels A B C and D are the four analog inputs of the unit on XLR at the back and the channels E F G and H are the four Ethersound input of the unit through the NXES104 fitted into the expansion slot N B Use one of the previous tabs Net Patch or I O ...

Page 69: ...delay unit between millisecond meters or feet by depressing the corresponding radio button 5 Security Lock This button allows locking the Local hardware interface on the front panel or the Remote through the ESmonitor buttons to prevent changing the settings on the NXAMP Both controls can be locked at the same time Locking unlocking can be set unset through ESmonitor or through the NXAMP front pan...

Page 70: ...to the user if then the user interface is the same than for an individual NXAMP On top of the output meters you can choose the NXAMP of the group you wish to monitor the output meters If some settings are different between two units inside the same group the corresponding control will be displayed in RED Once a control is changed in the group control page the settings will be applied to all units ...

Page 71: ...es onto this control and use the mouse wheel N B On some setups the volume settings may be linked 12 Delay settings Use the small buttons bellow the text box to increase or decrease the delay settings for each channel N B On some setups the delay settings may be linked 13 ArrayEQ settings To adjust the ArrayEQ on one channel use the small arrows bellow the text box You can also simply go to this c...

Page 72: ...n see in the picture bellow If you are in the following situation Some channels are individually muted and the Mute all is ON like on the picture bellow gray channels are muted Channel 1 Mute Channel 2 Mute Channel 3 Mute Channel 4 Mute Mute All Channel 1 Mute Channel 2 Mute Channel 3 Mute Mute All Channel 4 Mute Now if you press the Channel 2 Mute on the amplifier front panel or into ESmonitor th...

Page 73: ...NXES104 board fitted into the NXAMP The Alias is stored on the computer It uses the MAC address of the NXES104 to identity a specific unit Changing the computer or the NXES104 will disturb the alias of the units 20 Hardware and Firmware Here you check whereas the connected unit is an NXAMP4x1 or an NXAMP4x4 and what is the firmware revision inside 21 Scene Saving or recalling a scene can be done h...

Page 74: ...he setup number if the left column If you go to Show all setups mode by pressing the radio button then all the setups available in the units will be displayed 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 23 Virtual front panel size In order to fit on s...

Page 75: ...vailable firmware that you will find on our website What you need to upgrade your NXAMP NXAMP can be upgraded either By its serial port RS 232 By its Ethersound IN or Remote ES100 port if a NXES104 board is fitted NB Upgrade through one of the above Ethersound ports when the unit is a Primary Master This provides much faster results than the other solution Serial port upgrade To upgrade from the s...

Page 76: ...MP 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 board fitted...

Page 77: ...dld Then choose the serial port connected to the NXAMP Powered TDcontroller note only the detected and available serial port appears 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 board through the Ethersound network choose the Ethersound port interface and select the network card connected to the Ether...

Page 78: ...te 1 button down and keep it down 2 Turn ON the NXAMP Powered TDcontroller The NXAMP 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 NXAMP target and then download the appropriate software PAGE 78 OF 91 ...

Page 79: ...t 0 FLAT NO PROTN 4 ch amplifier For 3 seconds Selecting cabinet family Simultaneously repressing A B buttons at power up or during device RESET accesses the system change menu Keep the A B Buttons held until the default display appears approx 20 seconds This will allow the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and press B to load the req...

Page 80: ...tups GPIO port 5 Global Purpose Inputs and 8 Global Purpose Outputs Front Panel On Off switch Wheel A B buttons 40 char x 2 display Amp protect Stand by Power LED s For each ch volume 15 LEDs Mute w LED Output current LED Protect LED Peak LED Rear Panel 1 mains socket 2 for NXAMP4X4 RS232 GPIO Expansion slot 4 XLR w link 4 Speakon 4 NXAMP4X1 NXAMP4X4 Dimensions Weight 3U 19 Rack 457 mm 18 Depth 16...

Page 81: ...1 390 1337 337 4ohms ch 16 7 9 2 590 2023 510 1 8out 2ohms ch 21 8 12 0 620 2126 536 Line Current A Thermal Dissipation NXAMP4X4 120V 230V Watts Dissipated Btu h kcal h Idle 2 3 1 3 120 411 104 8ohms ch 26 0 14 3 800 2743 691 4ohms ch 40 0 22 0 1300 4457 1123 1 8out 2ohms ch 50 0 27 5 1700 5829 1469 1 BTU 1 055 06 J 0 252 kcal W 864 cal N B These values are for NXAMP without NXES104 or NX DFLT boa...

Page 82: ...DIMENSIONS Dimensions NXAMP4X1 front view dimensions NXAMP4X4 front view dimensions NXAMP4X1 and NXAMP4X4 top view dimensions PAGE 82 OF 91 ...

Page 83: ...surement tools you will never be able to tune the system as it should be Why it is unlikely the AUX and MAIN have the same phase Signal paths are likely to be different any filter modifying the bandwidth and EQ of the signal is also affecting the phase Example a 24dB oct high pass filter set at 15Hz is only affecting amplitude of the signal by 0 6dB at 30Hz but the phase shift is 90 At 100Hz we ca...

Page 84: ... the one with the CD12 2ms delayed The difference is 2dB at 100Hz This example is displaying the consequences of a slightly incorrect alignment If we add to this the delay introduced by a slightly different electric path plus the small delay introduced by some processing plus an EQ filter done by the user near the cut off frequency The graph above could shows differences in excess of 6dB Up to the...

Page 85: ... 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 85 OF 91 ...

Page 86: ...tation to see a complete list of presets supported in LOAD 2_52 by the NXAMP Please refer to the documentation enclosed with the firmware if the one loaded in your NXAMP is not LOAD 2_52 Keep in mind that you should hold the A B buttons down when resetting the NXAMP Powered TD controller to switch from one family of setups to the other PAGE 86 OF 91 ...

Page 87: ...nals It analyzes the output of the amplifier to measure the THD N thus we can know when we reach the clip of the amplifier with a certain value of distortion typically 1 The NXAMP under test is powered through a monitored power supply with voltage adjusted to 230 Volts 2 0 Volts and 50 Hz The 4 analog inputs of the NXAMP Powered TDcontroller are linked together so all the channels are fed DSP setu...

Page 88: ...r the power output of each channel of the amplifier in a precision of 10 Measurement method The input signal is a burst sine wave at 1 KHz for 20 ms every 500 ms We increase the input level up to reaching 1 THD N on the distortion analyzer We measure the signal with the scope cursor as shown in the picture bellow The last one wave of burst signal shall be measured Close up The center of the emissi...

Page 89: ...LI H05VV F 3G 1 0mm YUNG LI YC 12 NXAMP4X1 for UK PLUG CORD CONNECTOR WELL SHIN WS 012A WELL SHIN H05VV F 3G 1 0mm WELL SHIN WS 002 1 LONGWELL LP 61L LONGWELL H05VV F 3G 1 0mm LONGWELL LS 60 VOLEX MP5004 VOLEX H05VV F 3G 1 0mm VOLEX V1625 YUNG LI YP 60 YUNG LI H05VV F 3G 1 0mm YUNG LI YC 12 NXAMP4X4 PLUG CORD CONNECTOR WELL SHIN WS 010 WELL SHIN H05VV F 3G 1 5mm Neutrik NAC3FCA WELL SHIN WS 010A W...

Page 90: ...ROHS CERTIFICATE ROHS certificate PAGE 90 OF 91 ...

Page 91: ...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 91 OF 91 ...

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