Nexo NXAMP4X1 User Manual Download Page 26

Page: 26 / 140

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. 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. To reduce the risk of

electric shock, do not perform any servicing other than that contained in the operating

instructions unless you are qualified to do so.

Electromagnetic environments

The

emission

(this word describes all types of electromagnetic noise radiated by the

equipment) requirements which have been applied to Nexo’s Powered TDcontrollers are the

stringent requirements of the “Commercial and light industrial environment” of the product

family EMC standard for emission.

The

immunity

(this word describes the ability to cope with electromagnetic disturbance

generated by other items and natural phenomena) requirements that we have considered

exceed those applicable to the “Commercial and light industrial environment” of the

product family EMC standard for immunity. In order to provide a further safety margin, we

recommend that you do not operate the Powered TDcontrollers in the presence of

electromagnetic interference exceeding half of the limits found in this standard.

These two EMC standards are those applicable to pro-audio equipment for the

implementation of the “EMC directive”.

Analogue input signal cables

Analogue signals should be connected to the input ports of the NXAMP Powered

TDcontroller via shielded twisted pair or Starquad cable fitted with XLR connectors on the

NXAMP side. We recommend the use of low transfer impedance cables with a braided

shield and transfer impedance below 10 m

Ω

/m.

The NXAMP Powered TDcontroller is intended to be used with symmetrical (balanced)

sources (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

PAGE 26 OF 140

Summary of Contents for NXAMP4X1

Page 1: ...NXAMP4x1 NXAMP4x4 PoweredTDcontrollers DigitalPatchingUnit DigitalMetersUnit NXES104 NXDT104 User Manual v2 8 LOAD3_15 ...

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: ...Y PROCEDURE 6 EUROPEAN MODELS 6 TABLE OF CONTENT 6 NXAMP VERSUS NX242 WHAT S NEW 12 WHAT S REMAINING THE SAME 12 DSP CORE 12 LEVEL AND LATENCY 12 SOFTWARE 12 WHAT S CHANGED 12 INTEGRATED AMPLIFIER 12 COMPUTING RESOURCES 13 FOUR SEPARATE INPUTS 13 POWER SUPPLY 13 ETHERSOUND OPTIONAL BOARD 13 DANTE OPTIONAL BOARD 13 OPTIONAL DMU UNIT 14 OPTIONAL DPU UNIT 14 QUICK START 15 FRONT PANEL DESCRIPTION 15 ...

Page 7: ...GROUNDING SHIELDING SAFETY ISSUES 24 USING THE NXAMP WITHOUT A RACK 26 FUSES 26 ELECTROMAGNETIC ENVIRONMENTS 26 ANALOGUE INPUT SIGNAL CABLES 26 NXAMP POWER OUTPUTS WIRING 28 GENERAL DESCRIPTION 29 GLOBAL ARCHITECTURE 29 NXAMP4X1 GLOBAL ARCHITECTURE 29 NXAMP4X4 GLOBAL ARCHITECTURE 29 POWER SUPPLY BLOCK 30 ANALOG INPUT BLOCK 31 CONTROL BLOCK 31 POWER AMPLIFIER BLOCKS 32 POWER OUTPUTS BLOCK 32 USER I...

Page 8: ...Y EQ 46 ADJUSTING HEADROOM 47 HEADROOM CONCEPT 47 OPTIONS MENU 49 SYSTEM CONFIG 49 INPUT PATCH 54 SAVE RECALL USER SETUPS 59 SECURITY 61 GPIO MODE 62 LOAD MONITOR 70 MISCELLANEOUS 72 INSTALLATION RECOMMENDATIONS 74 AUDIO CHAIN RECOMMENDATIONS 74 ABOUT LOUDSPEAKER MANAGEMENT DEVICES 74 OPERATING SUB S FED THROUGH AN AUX OUTPUT 74 OPERATION OF MULTIPLE POWERED TDCONTROLLERS 74 SYSTEM ALIGNMENT 74 GE...

Page 9: ...DE 90 22 SCENE 92 23 CABINET SETUP 93 24 VIRTUAL FRONT PANEL SIZE 94 NXAMP AND NXES104 WITH THE ASIO STREAMER 94 WHAT ARE ASIO ASIO STREAMER 94 INSTALLING THE ASIO STREAMER 95 SETTING UP THE NXAMP FOR ASIO MODE 95 SETTING UP THE ASIOCONTROLPANEL 95 SETTING UP THE ASIO HOST 96 NXDT104 EXPANSION BOARD DANTE PATCHING AND REMOTE CONTROL 97 NXDT104 PHYSICAL DESCRIPTION 97 1 DANTE PRIMARY PORT 97 2 NETW...

Page 10: ...UTS 112 3 RS232 PORT 113 OPERATING THE DPU 113 CONNECTIONS AND START UP 113 DPU FRONT PANEL CONNECTORS ROUTING 114 DPU DISPLAYED INFORMATION 114 UNUSED FRONT PANEL CONNECTORS 116 LINKING SEVERAL DPU TOGETHER 117 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE 119 WHAT YOU NEED TO UPGRADE YOUR NXAMP 119 SERIAL PORT UPGRADE 119 NETWORK PORT UPGRADE FROM NXES104 OR NXDT104 120 CONNECT THE COMPUTER TO THE ...

Page 11: ...BETWEEN THE AUX AND MAIN OUTPUT OF YOUR DESK 132 WHY IT IS UNLIKELY THE AUX AND MAIN HAVE THE SAME PHASE 132 CONSEQUENCES OF BADLY ALIGNED SYSTEMS 132 PRECAUTIONS CHECK 133 APPENDIX A LIST OF SUPPORTED PRESETS LOAD3_15 135 APPENDIX B HOW IS MEASURED THE AMPLIFIER POWER 136 GENERAL DESCRIPTION OF THE SETUP 136 PRECISION OF THE MEASUREMENT 137 MEASUREMENT METHOD 137 USABLE MAINS CORD IN EUROPE 138 R...

Page 12: ...osing the compatibility with NX242 family of products Now with LOAD3_01 and above the setups themselves offer different level EQ crossover points and protection algorithm which cannot fit into older hardware like NX242 or NX242ES4 Software Basic Menus and functions are more or less the same only little learning curve is needed to go from the NX242 to the NXAMP LOAD3_15 does not fit other hardware ...

Page 13: ...n large power supply These large power supplies are precisely tailored to work around a precise Mains voltage so separate model of NXAMP exists for 110 120 Volts on one side these are models NXAMP4x1U and NXAMP4x4U and for 220 240 Volts on the other side these are models NXAMP4x1C and NXAMP4x4C However a Dual voltage version of the NXAMP4x4 exists to accommodate from both 110 120 Volts and 220 240...

Page 14: ... provides 8 x level meters one per analog input plus one per digital input from slot plus status LEDs for network ports N B Use LOAD3_11 or better for DMU support Optional DPU unit The DPU Digital Patching Unit is an optional 1U device that can be used together with the NXAMP powered TDcontroller to ease the patching of any Nexo speaker This unit will automatically route the amplifier output chann...

Page 15: ...switch 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 tur...

Page 16: ...p selection 5 Navigation buttons A B These 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 indic...

Page 17: ... the peak limiter is working to protect 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 holes are ...

Page 18: ...20 Volts model ref NXAMP4x4U or the 110 120 220 240 Volts model ref NXAMP4x4W 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 wi...

Page 19: ...ay for 4 channels mode 1 1 2 2 Speakon A Speakon B 1 1 2 2 1 1 2 2 Speakon C Speakon D 1 1 2 2 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 The output routing is always done this way in bridge mode 1 1 2 2 Speakon A Speakon B 1 1 2 2 1 1 2 2 Speakon C Speakon D 1 1 2 2 Gray lines shows the points of the ...

Page 20: ...nctions Reset You can reset the unit without powering off by simultaneously depressing buttons A B Select CH1 for 3 seconds at least 0 FLAT NO PROTN 4 ch amplifier For 3 seconds Selecting cabinet family 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 w...

Page 21: ...s not the same than a NX242 TDcontroller in flat mode see introduction for compensating values In Flat mode full amplifier digital protections are still available and some 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 CH1 button down and you will have the possibility ...

Page 22: ...ith 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 1 x CD ROM containing manuals and product brochures for the whole NEXO range N B The provided mains cord is Chinese type for NXAMP4x1C or NXAMP4x4C 220 240 Vo...

Page 23: ...er two references for NXAMP4x1 and three references for NXAMP4x4 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 110 to 120 Volts Max 2x 30 Amps NXAMP4x4W 220 to 240 Volts Max 2x 16 Amps Each model applies to various safety standards only whe...

Page 24: ... or under the TDcontroller shall be obstructed with a blank panel The rack is a free grounding and shielding structure and it provides extra shielding Therefore it is desirable that the screws used to fix the NXAMP Powered TDcontroller in the frame or rack provides an electrical contact between the chassis of the TDcontroller and the rack The primary reason for grounding is safety Conformance to t...

Page 25: ...XAMP4x1 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 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 PAGE 25 OF 140 ...

Page 26: ...wered TDcontrollers are the stringent requirements of the Commercial and light industrial environment of the product family EMC standard for emission The immunity this word describes the ability to cope with electromagnetic disturbance generated by other items and natural phenomena requirements that we have considered exceed those applicable to the Commercial and light industrial environment of th...

Page 27: ...rmed by grounded conductors among which are protective earth conductors PE and signal cable shields When a cable shield is grounded at both ends a loop is closed and the resulting current causes a reduction of the voltage induced on signal lines This effect is what the cable shield is intended to produce since this is how it protects your signal from magnetic fields If you are using an asymmetrica...

Page 28: ... 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 Z in Ohm Lmax in meters The table below indicates these values for...

Page 29: ...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 29 OF 140 ...

Page 30: ...ier 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 PAGE 30 OF 140 ...

Page 31: ...ffer that will remove the common noise on the input signal The maximum level allowed for 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 dashe...

Page 32: ...he sonic quality of the conventional class AB amplifier with the efficiency of the class D Power outputs block The power outputs block is used for current and voltage sensing at the output of the amplifier These data will be used by the DSP for protecting both the amplifier and the NEXO loudspeaker connected This stage features also a programmable routing unit that allows using the amplifier in br...

Page 33: ...oups the RS232 port on a sub D9 plug and the GPIO port on a sub D25 plug The RS232 port is mainly used to upgrade the firmware of the unit from a PC computer or to connect a NEXO DPU Digital Patching Unit 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 a...

Page 34: ... The expansion slot uses unique 80 pins connectors that will allow the user to simply fit an expansion board into the amplifier At the moment there is two expansion boards available the NXES104 Ethersound board and the NXDT104 Dante board The NXES104 is compatible with the ES 100 standard offering full remote control from a computer running ES monitor by Auvitran application and 4 channels of 24 b...

Page 35: ...ered 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 NX DFLT card should always be fitted in when no other expansion card is used PAGE 35 OF 140 ...

Page 36: ...SCRIPTION 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 36 OF 140 ...

Page 37: ... 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 delay The NXAMP TDcontroller will limit the delay adjustment to a group of channel in specific case such as Active setups where two different channels are in the sa...

Page 38: ...qualiser 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 39: ...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 40: ...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 41: ...ancel 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 42: ...Nothing pressed B B B B B Headroom 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 If the current setup does not match any of the provided NEXO setup i e the NXAMP is running a ...

Page 43: ...g down Please note that you don t need to wait for the amplifier to start for choosing your cabinet setup You should then see the two up and down arrows surrounded in the above drawing This means that you can change the speaker setup by turning the wheel Select the appropriate 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...

Page 44: ...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 volume setting 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 to increase by continuing to turn the wheel but other selected chan...

Page 45: ...n be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the delay setting maximum delay is 66 6 meters 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 to increase by continuing to turn the wheel but other selected channels may still increase the setting...

Page 46: ...e special circumstances cardioids setups for example it is mandatory to have same gain settings on two or more channels Then changing the gain on one of these channels will automatically adjust the gains on the other channels 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 anal...

Page 47: ...eadroom value can be read on the top of the LCD screen for each channel unit is dB To change the headroom for a given channel select the channel first by pressing the corresponding Select button The channel name on screen will then be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the headroom setting from 8 dB to 0 dB You can select multiple chann...

Page 48: ...put Amp ch3 Input Amp ch4 Input Min headroom position 8 dB situation Max input level Max Output Level Example above shows small input attenuation and small output gain Overall gain is 0 dB before amplifier In the same time the output analog or digital gains of all the channels are automatically adjusted to keep the same overall gain from inputs to outputs of the NXAMP Advantage of reducing the hea...

Page 49: ...er this sub menu OK is displayed on the screen align with Select 4 button Turn the wheel to select another sub menu When coming back to the Options menu later the last selected sub menu will be displayed first System config This menu allows changing between several speaker setups inside a same family or even through any family even if this last solution is not recommended Same family means that sa...

Page 50: ...o the default screen If you don t want to change the current speaker setup simply press the A button Back 201 S1210 XO RS15 CD 80 All OK If you want to recall a setup from another family you should first press the Select 4 All button the previous display without All on screen will be displayed but this time all the setup will be available when turning the wheel 201 S1210 XO RS15 CD 80 OK N B When ...

Page 51: ...p 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 You can then choose the speaker model among this Serie In the above example the PS15R2 has been selected You can now choose between normal mode and bridge m...

Page 52: ...cific channel is to choose among the available crossover when available Most passive cabinets and subs offer multiple crossover options but HF output for active cabinets usually has just one NB if only one crossover is available for the selected mode this step will be skipped Once the OK button is pressed the display goes back to the four channel information display while the selected speaker for ...

Page 53: ...rst 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 In the example bellow channel one cabinet PS15R2 is copied to channel two three and four 1 Keep 1 down 2 Press the other three at once Once this new setup is recalled 4 x PS15R2 PA 50 20k the display will be back to ...

Page 54: ...nnels patched on the outputs channels of the NXAMP To access the Input Patch menu go to the Option menu and select the sub menu 2 Input Patch By default and depending on the selected speaker setup selected some or all of the four inputs will be patched to the outputs For example 4 independent channels setups like 4 x PS15 will use each analog input patched to each output but 4 way active setups li...

Page 55: ...N 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 On the example bellow 4x PS10R2 setup you can see that input A to D are patched to PS10R2 processing channels After a few seconds the display will show the output speakon letter automatically Then a little bit later the display will change ...

Page 56: ...ain 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 This is confirmed in the next display It is followed by the output pinout display PAGE 56 OF 140 ...

Page 57: ...U DESCRIPTION Then a blank display appears to display clearly the limit between the two speakers parameters Now the display of the second speaker connected to these output speakon can start PAGE 57 OF 140 ...

Page 58: ...tput speakon B Turning the encoder allows now to adjust the input patched on this channel PS10R2 going to that output Speakon B The bottom line of the display is still displaying alternatively the speaker name PS10R2 the concern speakon Out B and the pinout 2 2 Once the desired input channel is selected from A to D for analog input on XLR A to analog input on XLR B and from E to H for digital inpu...

Page 59: ...roller so you can consider that a user setup is a snapshot of the amplifier state To access the Save recall menu go to the Option menu and select the sub menu 3 Save Recall see above On the center of the screen will be displayed the various setups with the setups name On each side you can select either Save or Recall function To save a user setup select the memory block you want to use there are 3...

Page 60: ...splayed on screen To recall a user setup select the memory block you want to use by turning the wheel till the chosen memory block appears on the top line of the LCD screen Then press the Select 4 button for Recall Anytime you can exit this menu by depressing the A button for Back Once the button Recall has been pressed a confirmation step is added Choose Yes to go on with recalling this is button...

Page 61: ...gate into the menus but cannot change settings of the unit However the MUTE buttons are still working This feature is enabled through a password that the user can choose 8 letters The default password is NEXONEXO When the remote controls are LOCKED the user can monitor the unit but cannot change settings through the network However the MUTE buttons are still working This feature is enabled through...

Page 62: ...en 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 password Password Ok Change Back In the previous menu you can then press the Select 2 or Select 4 buttons and toggle the Local or Remote access between FREE or LOCKED If you leave this menu and come back to this security menu later on you w...

Page 63: ...PI the state is Low internal pull down A switch can be directly connected to this input but if a GPIO output of another device should be connected it is mandatory to ensure a galvanic insulation between the two devices Only direct connection is authorized between NXAMP when they are located in the same rack GPIO mode 0 Default mode DMU mode In this default mode the GPIO port can be used with a NEX...

Page 64: ...nput2 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 If GPInput4 is Low Channel 4 will be unmuted Front Panel mute Unmute is still working If GPInput5 is H...

Page 65: ...lies Once started it will put its GPOutput1 pin Low also so several amplifiers can be linked together If GPInput2 is High the analog inputs will be muted If GPinput2 is Low the analog inputs will be unmuted If GPInput3 is High the digital inputs will be unmuted If GPinput3 is Low the digital inputs will be muted If GPInput4 is High Saved Scene number 2 will be recalled IF GPInput 4 is Low Saved Sc...

Page 66: ...ulse out to other amp GPOutput 7 Out GPInput 3 impulse out to other amp GPOutput 8 Out GPInput 4 impulse out to other amp When an impulse of at least 3 seconds is detected on GPInput1 amplifier will go from ON to Stand by state or from Stand by to ON state When an impulse is detected on GPInput2 the volume of all channels is increased by one volume step see volume menu for steps values When an imp...

Page 67: ... scene 4 GPInput 5 In Unused Pin Name In Out Meaning when set to 0 Default Meaning when set to 1 GPOutput 1 Out Scene 1 not in use Scene 1 in use GPOutput 2 Out Scene 2 not in use Scene 2 in use GPOutput 3 Out Scene 3 not in use Scene 3 in use GPOutput 4 Out Scene 4 not in use Scene 4 in use GPOutput 5 Out GPInput 1 impulse out to other amp GPOutput 6 Out GPInput 2 impulse out to other amp GPOutpu...

Page 68: ... Impedance monitoring This mode is used for outputting the status of the loudspeaker impedance monitoring system integrated into the NXAMP on the GPIO port You will need to set up the Load Monitoring in the Options Load Monitor menu to use this function properly 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 m...

Page 69: ... AND the NXAMP is able to measure the impedance of the speaker s connected to CH2 AND this impedance is between the high and low impedance limits set up by the user see Load monitoring menu GPOutput3 is High only if CH3 amplifier reports no fault AND the NXAMP is able to measure the impedance of the speaker s connected to CH3 AND this impedance is between the high and low impedance limits set up b...

Page 70: ...am sent to the NXAMP contains a HF pilot tone the impedance of the speakers can still be monitored at the pilot tone frequency Thanks to the 24 bits 48 KHz current and voltage sense circuitry only a small HF burst voltage is needed in most of the case typically 1 volt To access the Load Monitor menu go to the OPTION menu and select the sub menu 6 Load Monitor The following display will then appear...

Page 71: ...e reading of the impedance in the zone 7 of the display Long speaker cable and high impedance speaker s connected might need a higher output voltage A too big output voltage can lead to sub harmonic generation that can be audible at the speaker output 3 and 4 Impedance low and high limits Once the measured impedance is display in the Zone 7 you can select low and high limits that will trigger the ...

Page 72: ...the impedance will be displayed for example Z 17 3 Ω 3 If the impedance of the connected load is above 100 Ohm Z 100 Ω will be displayed Miscellaneous This menu will allow tweaking different small options available in the NXAMP Powered TDcontroller In LOAD3_15 it allows to change the delay unit and to set up the Dante ID when a NXDT104 card is fitted Bellow is a picture of this menu The sub menu l...

Page 73: ...a device on a Dante network when used in conjunction with other Yamaha compatible equipment The Dante Id is always represented with a Y followed by four hexadecimal numbers the range is from Y000 to YFFF and the default Dante Id is Y001 To change the Dante Id press Edit Select 4 button and turn the wheel up or down to change the highest digit of the address The Y part of the Dante Id cannot be edi...

Page 74: ...cessing 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...

Page 75: ...er s To convert the result 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 Measuring and aligning phase in the overlapping region Microphone must be set on the ground at a fairly distant listeni...

Page 76: ... 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 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 individ...

Page 77: ...s ES100 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 Since NXES104 firmware 0x0D0D a new ASIO functionality is also available the user can now stream 4 channels of 24bits 48 KHz audio...

Page 78: ... mono directional Ethersound network if no remote control computer is connected only the Tx LED of the OUT port will blink 3 Ethersound OUT Port This Port features an 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 if preserves it from external traction Use ...

Page 79: ... a list of the new ES100 functions Device to device communication With classical Ethersound implementation only the remote control computer can communicate with the various devices or the network and 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 dais...

Page 80: ...wide ISO standard called OSI Open System Interconnection Layer 2 is the communication protocol that contains the physical address of a network device It is called the data link layer or MAC Media Access Control layer and contains the address inspected by a bridge or switch Layer 2 processing is faster than layer 3 processing because less analysis of the frame is required As the EtherSound protocol...

Page 81: ...y flexible for bending around corners Solid wire cable has less attenuation and can span longer distances but is less flexible than stranded wire and cannot be repeatedly bent and therefore not suitable for live applications Following are the twisted pair categories Horizontal cable also called solid cable is made of plain copper conductors and has a low characteristics shift with aging It must be...

Page 82: ...ite 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 DRAKA 79909...

Page 83: ...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 and push it firmly inside the NXAMP Then put the two screws back to fix the NXES104 on the...

Page 84: ...onitor Revision NXAMP Revision ESmonitor before v3 5 ESmonitor v3 5 to v3 7 ESmonitor v3 8 to v3 15 2 ESmonitor v3 15 13 to v3 18 0 LOAD2_46 to LOAD2_51 No control Limited control Limited control Limited control LOAD2_52 to LOAD2_58 No control Limited control buggy vue meters Full control Full control LOAD3_01 to LOAD3_15 No control Limited control buggy vue meters Limited control No custom setups...

Page 85: ...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 Network inputs of the unit through the NXES104 fitted into the expansion slot N B Use one of the previous tabs Net Patch or I O patch to select which Ethersound channel will be r...

Page 86: ... the 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 fron...

Page 87: ... 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 in the group 7 Channels name...

Page 88: ... showing the output current A 10 Mute button Click on this button to mute or unmute individually a channel 11 Volume control This button can set up the volume for each channel of the NXAMP To adjust the volume with this virtual pot you can click and drag the button itself or use the mouse wheel while you are on the virtual pot area or use the two small arrows bellow the virtual pot N B On some set...

Page 89: ...e Amplifier If all parameters are OK like temperature DC offset mains value etc the display will be NXAMP ALL OK If not the error will be displayed here If the unit is in standby it will be also shown here 17 Overmute The Mute all button acts as an Overmute button When pressed the four channels of the unit will be muted but the individual mute status of each channel is preserved That is why the Mu...

Page 90: ... of the MAC address of the 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 information Here you check whereas the connected unit is an NXAMP4x1 or an NXAMP4x4 and what is the firmware revision inside 21 ASIO Mod...

Page 91: ...rectly 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 NB Although remote control of the NXAMP can be done from the Ethersound IN port or from the Remote ES100 port streaming ASIO can only be done from the R...

Page 92: ...rsound network on the other hand thus feeding other amp on this network these NXAMP should then be in ASIO mode OFF In that mode the NXAMP is no longer an Ethersound receiver and becomes a four channel Ethersound source 22 Scene Saving or recalling a scene can be done here pressing the Set button Select the Scene of your choice and then choose Save or Recall The scene and there name are saved into...

Page 93: ...lays the list of the setups available into the memory of the NXAMP By default only the setup from the same family are displayed NB First time you press the Set button for a NXAMP firmware that is not known yet by ESmonitor on this computer it might take a few seconds to read all the setups available The current setup is marked with a star You can also see the setup number if the left column If you...

Page 94: ...al audio software referred as ASIO host bellow supports ASIO protocol The ASIO streamer allows you to send directly four channels of digital audio in 24 bits 48 KHz from a PC computer to any NXAMP connected directly or through a local area network No soundcard or external hardware is needed Thus the NXAMP can be seen as a remote soundcard The ASIO streamer works in point to point mode meaning that...

Page 95: ...l be the physical receiver of the audio data sent by the Host Setting up the NXAMP for ASIO mode See the NXAMP control page in ESmonitor software above for details Setting up the AsioControlPanel The settings are very straightforward Here is a picture of the AVS AsioControlPanel The ASIO settings should be let unchanged in most of the cases See the ASIO streamer user manual on the Auvitran website...

Page 96: ...the computer so if 2 channels are enough for stereo track playback for example we recommend using this setting The Status light should be green in the AVS AsioControlPanel if the NXAMP is ready to receive audio It will blink if any ASIO host is currently streaming audio to the NXAMP Setting up the ASIO host Select Auvitran ASIO in the ASIO host output device menu Most of the time the ASIO host wil...

Page 97: ... inputs of 24 bits 48 KHz audio data from a Dante network and also remote control of the unit through the PC based application ESmonitor WARNING Only 48 KHz audio from Dante network is supported NB The firmware of the NXDT104 is automatically updated if needed when the firmware of the host NXAMP is updated see further in this manual NXDT104 Physical description The NXDT104 is designed to fit the N...

Page 98: ... Dante audio data on the dedicated Primary and or Secondary ports WARNING Do not connect several ports of the NXDT104 to the same switch This will create a loop and stop all traffic on all network ports of the card Another advantage of the Remote control port is to provide a redundancy of the remote control when the two Primary Secondary Dante ports are used in redundant mode as Secondary Dante po...

Page 99: ...ct cable but you can run through a 100 Mb 1 Gb switch Wireless LAN A local area network that transmits over the air typically but not exclusively in an 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 ha...

Page 100: ...isible in the Dante controller Dante controller does not take care of remote control or monitoring of Dante devices WARNING Dante controller can be in conflict whit other hardware software trying to monitor the Dante network status for example Yamaha CL consoles are using an embedded controller of the Dante network It is recommended to use Dante controller for patching audio over the Dante network...

Page 101: ...s supports Zeroconf protocols meaning that you don t have to enter any IP address manually If a DHCP Dynamic Host Configuration Protocol server is available on the network it will assign IP addresses to Dante devices if not they will find a unique and unused IP address by themselves WARNING Some manufacturers use some proprietary software layer on top of standard Dante set of protocols which somet...

Page 102: ...can be useful for troubleshooting Device View When the name of a Dante device is double click in the Dante controller a new window called Device View will open This new windows offers more information on a particular device The first tab Receive allows checking which Dante device will send audio to the current NXAMP It is also the only place where you can Unsubscribe by pressing the button in the ...

Page 103: ...ndant mode Switch mode is the default mode The three network ports of the NXDT104 Primary secondary and Remote can be seen as three ports of a switch the NXAMP being connected on an internal fourth port Dante network can be connected to any of this ports and the remaining ports can be used to link to other devices on the network Each port can run independently at 1 Gb or 100 Mb depending on the co...

Page 104: ... available Last buttons in the bottom of the page are here for compatibility reason and should not be used WARNING Never press the Reboot or Factory Reset buttons when speakers are connected to NXAMP as it can lead to unpredictable noise on the output NXAMP with NXDT104 control page in ESmonitor software ESmonitor software by Auvitran is a free PC based application running under Windows XP and Win...

Page 105: ...access to the control page of the NXAMP Powered TDcontroller Enabling remote control of NXAMP with NXDT104 in ESmonitor To enable the monitoring of NXAMP on a Dante network through ESmonitor you have to check the Enable Dante device control option in the AVS Control Panel installed together with the ESmonitor software NB This option is only available from ESmonitor v3 16 9 WARNING Do not use ESser...

Page 106: ...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 The Dante Id is always represented with a Y followed by four hexadecimal numbers the range is from Y000 to YFFF and the default Dante Id is Y001 More information about setting up a Dante network Check the Audinate website http www au...

Page 107: ...og outputs of a mixer for example to the NXAMP input Both XLR3 male and female are in parallel for each input marked A to D allowing to link several DMU together 2 Input view meter Fore each input a view meter is installed between the two XLR This meter shows the audio level with a maximum of 0 dBr meaning the clip of the input stage witch is 28 dbU The scale is the following Number of LEDs ON NXA...

Page 108: ...imize the distortion on the signal path The analog audio signal will always flow from the front panel to the back panel of the DMU even if it is not powered 3 GPIO port This GPIO port is intended to be connected to the NXAMP GPIO Thus power supply 5 Volts from the NXAMP will be fed to the unit and the view meters data will also be provided through the GPIO port You will need a straight DB25 male m...

Page 109: ...port of the DMU to the GPIO port of the NXAMP using a straight DB25 male male cable Connect the NXAMP mains plug s and turn the NXAMP ON Check the LOAD revision while booting up it should be LOAD3_11 or above All LEDs will be on at startup for a short time allowing an easy check that the unit is correctly powered and that all LEDs are working Then after a few seconds the view meters will represent...

Page 110: ...DMU DIGITAL METERS UNIT FOR NXAMP PAGE 110 OF 140 ...

Page 111: ...There are four connectors like this on the front panel These connectors will be used to connect any Nexo speaker that uses the same type of connector 2 SpeakON 8 poles output There are two connectors like this on the front panel These connectors will be used to connect the Nexo speaker of your choice if it uses the same type of connector of it is uses EP6 connector The use of speakers with EP6 con...

Page 112: ...ted to the power outputs of the NEXO NXAMP4x4 or NXAMP4x1 powered TDcontroller Connect the NXAMP Speakon A output to the DPU Input A input Connect the NXAMP Speakon C output to the DPU Input C input WARNING Use 4 x 4 mm AWG11 cable and four poles speakON to connect NXAMP power outputs to DPU inputs 2 meters 16 feet max This mark indicates a dangerous electrically live terminal When connecting an e...

Page 113: ...re is nothing to set up The only requirement is that the NXAMP firmware supports the DPU otherwise it will stay in Stand by mode with nothing patched on its front panel connectors WARNING NXAMP firmware should be at least LOAD3_11 for the DPU to work If not the DPU will stay in stand by with nothing routed on its outputs Connections and start up Be sure that the host NXAMP and the DPU are both dis...

Page 114: ...only one of this plug kind will be used at a time but this parallel wiring can be useful to carry two SPK4 outputs over a SPK8 long cable for example with breakout box at the other end or to link several amplifier together see further in this manual Or course the routing from the amplifier output to these front panel connectors is done dynamically regarding the combination of four speakers setups ...

Page 115: ...SPK8 the other one to the SPK4 because you can either use a SPK4 to connect directly the S2 and the B1 15 or you can use a SPK8 to a M3 cabinet from which you will link a S2 or B1 15 using a SPK4 The M3 cabinet can be connected using SPK8 only so it shows only arrow to this plug Note that the M3 text is displayed on both line because is is an active speaker using both 3 3 pair and 4 4 pair of the ...

Page 116: ...The DPU will always try to use the maximum of outputs available to fit all the need of the user without external adaptor or difficult cabling Thus sometimes the same channel is routed on several outputs Even if the DPU will never output a speaker signal on a wrong pinout check the display information to be sure to load the wanted amplifier channel In the bellow example a setup using PS10R2 LS600 P...

Page 117: ...akON 8 connector to a complete STM system S118 B112 M46 First NXAMP4x4 will run the setup number 67 of the LOAD3_15 running the STM in stacked mode feeding Main boxes M46 in active on two channels and the STM bass box B112 on two other bridged channels The DPU outputs will then be Note that the 1 1 pins of the first SPK4 are not connected to anything and that the corresponding display line is empt...

Page 118: ...DPU DIGITAL PATCHING UNIT FOR NXAMP SPK8 To STM Stack SPK4 Link between DPUs PAGE 118 OF 140 ...

Page 119: ... the setup list in a separate document 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 By any of the network ports of a NXDT104 board NB Upgrade through one of the above Ethersound ports when the unit is a Primary Master This provides faster results than the other solution WARNING When...

Page 120: ...mputer running Windows XP 32 bit Windows Vista 32 bit Windows Vista 64 bit Windows Seven 32 bit Windows Seven 64 bit with NXwin4 installed A RJ45 Ethernet 100 base TX full duplex port A cat5 network cable crossover or straight Connect the computer to the NXAMP Locate the serial port or the one of the usable network port at the back of the controller and use the null modem cable or the crossover ca...

Page 121: ...fitted because NXwin4 can also upgrade the firmware of the network card itself what cannot be done through the serial port 4 Dante primary secondary or remote port These ports are equivalent for firmware download you can use any of them Several amp with NXDT104 cards can be linked through the available ports and even NXAMP with NXES104 board can be connected through their Remote ES100 port allowin...

Page 122: ...PI 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 Then through the start menu double click on Programs Nexo Firmware Update NXwin4 The Nexo loader will appear on the screen of the computer Use the Browse button to select the firmware file the extension ...

Page 123: ...ork card connected to the NXAMP s Select device that you want to upgrade by default only units in Download mode will be selected 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 If a NXES104 or NXDT104 is fitted and need to be upgraded it will be automatically done as well WARNING Af...

Page 124: ... 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 3 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 ...

Page 125: ...NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE PAGE 125 OF 140 ...

Page 126: ...new cabinet setups 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 ...

Page 127: ... 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 NXDT104 or NX...

Page 128: ...NXAMP DIMENSIONS NXAMP Dimensions NXAMP4X1 front view dimensions NXAMP4X4 front view dimensions NXAMP4X1 and NXAMP4X4 top view dimensions PAGE 128 OF 140 ...

Page 129: ... DPU TECHNICAL SPECIFICATIONS Routing features Routing matrix Route any of the four input channels to one or several Speakon pins pairs on the front Front panel features Power outputs 4 Neutrik SpeakON 4 and 2 Neutrik SpeakON 8 LCD Displays 4 x Alphanumeric displays with backlight 2 lines of 8 characters Back panel features NXAMP power inputs Neutrik SpeakON 4 for connecting the NXAMP Powered TDco...

Page 130: ...DMU DIMENSIONS DMU Dimensions 44 480 50 DMU top and front view dimensions in mm DPU Dimensions 44 480 248 DPU top and front view dimensions in mm PAGE 130 OF 140 ...

Page 131: ...Latency 0 10 ms 0 25 ms to 5 0 ms Front panel features Network inputs 2 shielded Neutrik Ethercon 2 shielded Neutrik Ethercon Additional port RJ45 for additional remote control Additional remote control Dante port LEDs on network ports Tx and Rx on each port Link Act and Speed on each port LEDs on additional port Link and activity Link and activity Specifications Power supply 3 3 Volts DC 2 W from...

Page 132: ...urement 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 can...

Page 133: ...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 134: ...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 134 OF 140 ...

Page 135: ...r 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 Please refer to the documentation enclosed with the firmware if the one loaded in your NXAMP is not LOAD3_15 PAGE 135 OF 140 ...

Page 136: ...als 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...

Page 137: ... 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 emissio...

Page 138: ...I 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 WE...

Page 139: ...ROHS CERTIFICATE ROHS certificate PAGE 139 OF 140 ...

Page 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 com PAGE 140 OF 140 ...

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