REFERENCE MANUAL INTEGRATED AMPLIFIERS ENGLISH -
REFERENCE MANUALINTEGRATED AMPLIFIERSSUPERNAIT 2 NAIT XS 2 NAIT 5siENGL ISH
C onte ntsSectionPage9.3Speaker Outputs109.4av and hdd Outputs1019.5Headphone Output1019.6AV Bypass11Loudspeaker Cables19.7Other Signal Inputs and Outputs11Mains Power19.8Power Supply Upgrades112.1Mains Plug Wiring19.9General Connections Notes112.2Equipment Fuses19.10External Control and Interface112.3Non-rewirable Mains Plugs110Controls and Connections122.4Mains Circuits and Cables110.1Front Panel Controls123General Installation210.2Rear Panel Connections123.1Siting The Equipment211System Connections133.2Switching On211.1Nait XS 2 with FlatCap XS Power Supply133.3Running In211.2Nait XS 2 with Hi-Cap Power Supply3.4Radio Interference2and NAP 200 Power Amplifier3.5Lightning Precautions212Amplifier Operation3.6Problems?2and Programmable Functions143.7Service and Updates212.1Automatic Input Switching1412.2Handset Volume 6Remote Control1412.7Defaults1412.8Fault 1.1Interconnect Cables1.22134SUPERNAIT 2Introduction, Installation and Connection34.1Mains Power Connection34.2Signal Inputs34.3Speaker Outputs34.4av and hdd Outputs34.5Headphone Output34.6AV Bypass44.7Other Signal Inputs and Outputs414NAIT 5si4.8Power Supply Upgrades4Introduction, Installation and Connection164.9General Connections Notes414.1Mains Power Connection164.10External Control and Interface414.2Signal Inputs165Controls and Connections514.3Speaker Outputs165.1Front Panel Controls514.4hdd Output165.2Rear Panel Connections514.5Headphone Output166System Connections615Controls and Connections176.1SUPERNAIT 2 with Hi-Cap Power Supply615.1Front Panel Controls176.2SUPERNAIT 2 with additional15.2Rear Panel Connections17NAP 200 Power Amplifier16Amplifier Operation6.3SUPERNAIT 2 with Hi-Cap Power Supplyand Programmable Functions18and NAP 200 Power Amplifier16.1Automatic Input Switching187Amplifier Operation16.2AV Bypass18and Programmable Functions816.3Handset Volume Control187.1Automatic Input Switching816.4Mute187.2Handset Volume and Balance Control816.5Display187.3Mute816.6Remote 8Fault Conditions187.6Remote Control817Specifications197.7Defaults87.8Fault Conditions818NARCOM 4 Remote Handset208Specifications918.1Using NARCOM 42018.2NARCOM 4 Keys209NAIT XS 2Introduction, Installation and Connection1019Declaration of Conformity219.1Mains Power Connection1020Statutory Safety Warnings219.2Signal Inputs1067
I ntrod u c tio nNaim Audio products are conceived with performance as the top priority. Carefulinstallation will help ensure that their full potential is achieved. This manual covers allintegrated amplifiers. It begins with some general installation notes. Product specificinformation begins in Section 4.1 Con n ect ionsNote: Please read theStatutory Safety Warningsfound at the end of thismanual.2.1 Mains Plug WiringIn some territories a mains plug may need to be fitted tothe supplied mains lead. As the colours of the wires in themains lead may not correspond with the coloured markingsidentifying the terminals in the plug proceed as follows:It is important for both safety and performance thatthe standard cables supplied are not modified.1. 1 Interconne c t C able sThe wire coloured GREEN-AND-YELLOW must beconnected to the terminal in the plug marked by theletter E or by the safety earth symbol or coloured GREEN orGREEN and YELLOW.If options are available with your equipment andinstallation, DIN interconnect sockets should be used inpreference to RCA Phono sockets. One end of each Naiminterconnect cable is marked with a band to establishits correct orientation. The band denotes the end thatconnects to the signal source. Naim Hi-Line interconnectcable will provide the best results.The wire coloured BLUE must be connected to the terminalin the plug marked with the letter N or coloured BLACK.The wire coloured BROWN must be connected to theterminal in the plug marked with the letter L or colouredRED.Interconnect plugs and sockets should be kept cleanand free from corrosion. The easiest way to clean themis to switch off the equipment, pull the plugs out of theirsockets, and push them back in again. Contact cleanersand “enhancers” should not be used as the film theydeposit may degrade the sound.2 . 2 E q u i p m en t Fu s esMains powered Naim Audio equipment is fitted with amains fuse on the rear panel adjacent to the mains inputsocket. Replace it if necessary only with the spare fusesupplied or with an identical fuse. Repeated failure of thefuse points to a fault that should be investigated by yourretailer or Naim itself.1. 2 Loudspea ke r C able sLoudspeaker cables are vitally important. They shouldeach be at least 3.5 metres long and of equal length. Therecommended maximum is normally 20 metres althoughlonger cables may be viable with some Naim amplifiers.2 . 3 N on -r ew i r a b l e M a i n s P l u g sSome Naim amplifiers are designed only to work withNaim loudspeaker cable and using alternatives maydegrade the performance or even damage the amplifier.Other Naim amplifiers can be used with any high qualityloudspeaker cable although we recommend that Naimloudspeaker cable is used. Naim loudspeaker cable isdirectional and should be oriented so that the printedarrow points towards the speakers. The Naim loudspeakerconnectors supplied are designed to comply withEuropean safety legislation and must be used.If a non-rewirable plug is cut from a mains lead (forwhatever purpose) the plug MUST be disposed of in a wayto render it totally useless. Considerable shock hazard existsif the cut-off plug is inserted into a mains outlet.2 . 4 M a i n s C i r cu i t s a n d C a b l esA hi-fi system usually shares a mains circuit with otherhousehold equipment some of which can cause distortionof the mains waveform. This distortion can in turn lead tomechanical hum from mains transformers. Some Naimtransformers are large in size, making them relativelysensitive to such distortion, and it may be necessary to takeaccount of transformer hum when siting your equipment.Contact your local retailer or distributor for further adviceon loudspeaker cables and connectors.2 Main s P ow erTransformer hum is not transmitted through the speakersand has no effect on the performance of the system;however, a separate mains circuit may reduce it. Sucha circuit (ideally with a 30 or 45 Amp rating) will alsogenerally improve system performance. Advice on theinstallation of a separate mains circuit should be soughtfrom a qualified electrician.Where fused plugs are used 13 amp fuses should befitted. Fuses of a lower rating will fail after a periodof use. Do not wire voltage dependent resistors ornoise suppressors into mains plugs. They degrade themains supply and the sound.Use only the mains leads and plugs supplied or the NaimPowerLine mains cable.E1
I ntrod u c tio n3 Gen er al Instal l a ti o n3 . 4 R a d i o I n t er f er en ceIn some circumstances, depending on where you liveand the earthing arrangements in your home, you mayexperience radio frequency interference. Controls onbroadcasting in some territories allow very high levels ofradio frequency radiation and both the choice and exactsiting of equipment may be critical. Susceptibility to radiofrequency interference is related to the wide internalbandwidth necessary for high sound quality. A radiofrequency filter kit is available for some Naim equipmentbut sound quality will be progressively compromised asmore elements of the kit are fitted.Naim equipment is designed to offer the finestperformance possible avoiding compromisewherever practical. This can lead to circumstancesthat may be unfamiliar. The notes that follow containadvice specifically related to Naim equipment aswell as more general warnings about the use ofdomestic audio products. Please read them carefully.3. 1 S iting The Equipme ntIn order to reduce the risk of hum audible from theloudspeakers, power supplies and power amplifiersshould be located a reasonable distance away fromother equipment. The maximum separation distance forconnected equipment is that allowed by the standardinterconnect lead.3 . 5 L i g h t n i n g P r eca u t i on sYour Naim hi-fi system can be damaged by lightningand should be turned off and disconnected from themains when there is risk of lightning strike. For completeprotection all mains plugs and any aerial cables should bedisconnected when not in use.Some Naim equipment is extremely heavy. Check theweight of the equipment prior to lifting and if necessaryuse more than one person so that it can be moved safely.Ensure that your equipment rack or table can easilysupport the weight and is stable.3 . 6 P r ob l em s ?Source components and power supplies should beswitched on before the power amplifiers. Always switchamplifiers off and wait a minute before connecting ordisconnecting any leads. Always use the power switch onthe product rather than a mains outlet switch.Consumer protection varies from country to country. Inmost territories a retailer must be prepared to take backany equipment he has sold if it cannot be made to worksatisfactorily. A problem may be due to a fault in thesystem or its installation so it is essential to make full use ofyour dealer’s diagnostic skills. Please contact your localdistributor, or Naim Audio directly, if any difficulties cannotbe resolved.A “thump” may be heard from the loudspeakers as poweramplifiers are switched on. This is normal, will not causeany loudspeaker damage and does not point to any faultor problem. A mild “pop” may also be heard shortly afterequipment is switched off.Some Naim equipment is made in special versions fordifferent territories and this makes it impracticable toarrange international guarantees. Please establish thelocal guarantee arrangements with your retailer. ContactNaim Audio directly for help and advice if necessary.3. 2 S witching O n3 . 7 S er v i ce a n d Up d a t es3. 3 Running InIt is essential that repairs and updates are only carriedout by an authorised Naim retailer or at the factory byNaim itself. Many components are custom made, testedor matched and appropriate replacements are oftenunobtainable from other sources.Naim equipment takes a considerable time to run inbefore it performs at its best. The duration varies, but undersome conditions the sound may continue to improve forover a month. Better and more consistent performancewill be achieved if the system is left switched on for longperiods. It is worth remembering however that equipmentleft connected to the mains can be damaged bylightning.Direct contact to Naim for service or update informationshould be made initially through Customer Services:Tel: 44 (0)1722 426600Email: info@naimaudio.comPlease quote the product serial number (found on its rearpanel) in all correspondence.E2
SU P E R N A IT 24 SUP E R NAIT 2 Intro d ucti o n, Instal l a ti on a nd C onnecti onThe Supernait 2 is a very high performance stereo integrated amplifier that combines apreamplifier providing six line-level analogue inputs with a power amplifier rated at 80Watts per channel. The Supernait 2 can be controlled by either its remote handset or byfront panel mounted volume and balance knobs, and mute and input selection buttons.The Supernait 2 remote handset is described in Section 18 of this manual. A front panel6.3mm jack socket enables the use of headphones with the Supernait 2.A variety of power supply upgrade, alternative preamplifier and alternative or additionalpower amplifier options are possible for the Supernait 2. Diagrams illustrating theconnection of some of these are shown in Section 6. If no power supply or alternativeamplifier options are to be employed, the Supernait 2 preamp/power amp link plug,supplied in the accessory pack, must be fitted to the rear panel “preamp out” and“power amp in” sockets. The link plug is shown fitted in Diagram 5.2.Your Supernait 2 should be installed on a dedicated equipment stand intended forthe purpose. Do not stand it directly on top of another item of equipment. Care shouldbe taken to ensure that it is level. The amplifier should be installed in its final locationbefore connecting cables or switching on. Ensure that the volume is turned down beforeswitching on.Note: The Supernait 2incorporates an AVBypass switch on its rearpanel. The switch shouldonly be set to “On” if theamplifier is to be usedin conjunction with anAV processor in a hometheatre system. In allother installations theAV Bypass switch shouldbe set to “Off”. Speakerand amplifier damagemay occur if a signal isinadvertently connectedto the Supernait 2 avinput while the AVBypass switch is “On”.4. 1 Mains P owe r C o nne c tio nConnect the Supernait 2 to a mains power socket usingeither the mains cable supplied or a Naim Power-Line.4. 2 S ignal Inp utsalways be used. Naim speaker cable will provide the bestresults, however, a wide range of speaker cable types canbe used without risk of damage to the amplifier.The Supernait 2 front panel input buttons select the sourceinput signal to be routed to the integral power amplifierand the loudspeakers or headphones. The six buttons arelabelled cd, tuner, hdd (hard disk drive), av, aux 1 and aux 2.Ensure when connecting speakers that they are “inphase”. That is, the positive and negative connectionorientation at both the speaker and amplifier ends of thecable is the same for both channels.The cd, tuner, hdd and av input buttons correspond toparallel DIN and RCA phono input sockets on the rearpanel, while the aux 1 input button corresponds only to apair of RCA phono sockets.4.4 av and hdd OutputsNote: The hdd and av sockets carry both inputs andoutputs. See Section 4.4 for more information.The Supernait 2 av and hdd inputs have associatedoutputs that enable the selected input signal to be routedexternally; to an audio recording component for example.The aux 2 input button corresponds to a DIN input socketon the rear panel. The aux 2 DIN socket also carries apower supply output intended to power a Naim Stagelineor SuperLine phono preamplifier.Note: The av and hdd outputs remain active whiletheir corresponding inputs are selected. Take care thata feedback loop is not inadvertently created by thesimultaneous selection of input and output.Note: For optimum sound quality DIN sockets should beused in preference to RCA phono sockets.4 . 5 H ea d p h on e O u t p u tNote: Where an input has DIN and phono socket optionsonly one should be connected at any one time.The Supernait 2 headphone output is able to drive themajority of headphone types. The 6.3mm (1/4”) jacksocket, rather than the smaller 3.5mm jack socket, providesmore reliable connection and potentially higher soundquality. Most high-quality headphones are supplied withan adaptor that enables use with either 3.5mm or 6.3mmjack sockets. Inserting a headphone plug will mute theSupernait 2 speaker outputs. Removing the headphoneplug will restore the outputs.Always use high quality interconnect cables to connectsources to inputs. The Naim Hi-Line will produce the bestresults.4. 3 S peaker OutputsA set of stereo speaker connection sockets is provided onthe rear panel. Custom Naim loudspeaker connectors aresupplied to make the connection and in order to complywith current European safety regulations these shouldE3
SU P E R N A IT 24. 6 A V BypassDiagrams 6.1, 6.2 and 6.3 illustrate some applications ofthe Supernait 2 preamp out, power amp in and bi-ampsockets.The Supernait 2 can be integrated within a multi-channelhome theatre system, driving the front left and rightchannel speakers, by engaging its AV Bypass mode.AV Bypass mode enables a home theatre processor totake over volume control of signals connected to theSupernait 2 av input. It is engaged using the switch on therear panel. The Supernait 2 volume control indicator willextinguish when AV Bypass mode is engaged and the avinput is selected. The remote handset volume control willalso be disabled.4 . 8 P ow er S u p p l y Up g r a d esThe Supernait 2 preamplifier can be upgraded through theconnection of an external Flatcap, Hi-Cap or Supercappower supply. Diagrams illustrating power supply upgradesare shown in Section 6. The Supernait 2 and external powersupply must be switched off when connections are made.Switch on the external power supply first followed by theSupernait 2 when all connections are complete.Note: The AV Bypass feature must be used with care. Itbypasses the Supernait 2 volume control leaving any signalconnected to the av input to be passed to the speakers atfull volume.4 . 9 G en er a l C on n ect i on s N ot esThe Supernait 2 negative input and output connectionsfor each channel are common. The mains earth (ground)should always be connected regardless of what otherequipment is used in conjunction with the amplifier. Themains earth only grounds the case and the electrostaticNote: Inserting a headphone plug while AV Bypass modeis selected temporarily returns the Supernait 2 to normaloperation. Removing the headphone plug will return theSupernait 2 to AV Bypass mode.screen within the transformer, and is not connected to thesignal negative. In order to avoid hum loops, the signalnegative of the whole system should be connected to themains earth (ground) in one place.Note: The mute function is disabled when AV Bypass modeis engaged.4. 7 O ther S ign al I nputs and O utpu t sA signal ground connection is fitted to the Supernait 2 rearpanel. This is intended to be used to connect a turntablepick-up arm signal earth only.The Supernait 2 incorporates DIN bi-amp (output), RCAphono sub out, DIN pre-amp out, and DIN power-amp insockets on its rear panel. In normal use the pre-amp outand power-amp in sockets are connected by a link plug.The link plug should be removed only in the followingcircumstances:4 . 1 0 E x t er n a l C on t r ol a n d I n t er f a ceThe Supernait 2 is fitted on its rear panel with a 3.5mm jackRemote In socket and a mini-USB interface socket. A power supply upgrade is to be used.The Remote In socket can be used for RC5 remote controlof the Supernait 2 via a wired connection or a remote IRrepeater. A n alternative preamplifier is to be used with theSupernait 2 power amplifier.The mini-USB socket enables firmware upgrades anddiagnostic tests to be carried out. Contact your Naimretailer for more information if required. A n alternative power amplifier is to be used with theSupernait 2 preamplifier.Note: When an external preamplifier is connected to theSupernait 2 power-amp in socket, a fault will initially beindicated by the Supernait 2 mute button flashing. To clearthe fault, press and hold the flashing mute button. This willun-mute the amplifier and turn off the display and volumeindicator.Note: The mini-USB interface is not intended for theconnection of USB memory devices.Note: The power amp in socket carries a 24V DC powersupply output intended for Naim preamplifiers that requirean external power supply.The Supernait 2 DIN bi-amp output socket provides apreamp output signal that enables a second poweramplifier to be used in conjunction with the Supernait 2power amplifier.The RCA phono sub out sockets provide a stereo outputintended for connection to an active subwoofer. Theoutput signal is a duplicate of the preamplifier output. Nolow-pass filtering is applied.E4
SU P E R N A IT 25 Con t r ols and Connecti o ns5. 1 Front P ane l C o ntro lssource selectionvolumebalancemuteheadphonesocket5. 2 Rear P anel C o nne c tio nsleftspeakermainsinputand fusecd and tunerInputsncncav and hddInputsch2-vech1(out)ch2(out)ch1ch2-ve-vepreamp andbi-amp outch1ncbi-amp outavremote eakersignal groundpreamp out andpower amp in. Linkplug fitted. vech1 vech2suboutaux 1 av inin RCA RCAhdd tuner cdin RCA in RCA in RCANote: The link plug should be removed only if a powersupply upgrade is to be used or an alternative preamplifieris to use the Supernait 2 power amplifier section. It shouldremain fitted in all other circumstances.aux 2 input-vepower amp inch2-veaux 2in &power av in hdd in tuner& out & out inoutcd inch1 veE5
SU P E R N A IT 26 Sy st em Conne cti o nsThe following three diagrams illustrate examples of Supernait 2 system connections. Manyother systems using external power supplies or additional power amplifiers are possible.Contact your Naim retailer or local distributor for more information.6. 1 S UP E RNAIT 2 with H i- C ap P o we r S u p p l ypowermainsinputand fuseNote: The Supernait 2 should remain connected to mainspower at all times.cabledirectionmarkermains inputand fuse6. 2 S UP E RN AI T 2 with additio nal NA P 2 0 0 P ow er A m p l i f i erpowermainsinputand fuseNote: The Supernait 2 should remain connectedto mains power at all times.mains inputand fuseE6Interconnect Cables4 to 4 pin DIN240 5 to 5 pin DIN
SU P E R N A IT 26. 3 S UP E RNAIT 2 with H i- C ap P o we r S u p p l y a n d N A P 2 0 0 P ow er A m p l i f i erpowermainsinputand fuseNote: The Supernait 2 should remain connected to mainspower at all times.cabledirectionmarkermains inputand fusemains inputand fuseE7Interconnect Cables4 to 4 pin DIN240 5 to 5 pin DIN
SU P E R N A IT 27 Amplifier Op era ti o n a nd Prog ra m m a b l e F uncti onsThe Supernait 2 incorporates some programmable functions and operational nuances.These are described in the following paragraphs.7. 1 A utomatic I nput Switc hing7.3 M ut eWith Automatic Input Switching engaged the appropriatesource input will be selected as soon as any handsetfunction for that (Naim) source component is operated.For example, if the tuner input is selected and the cdplay key is pressed on the handset, the Supernait 2 willautomatically switch to the cd input. Automatic InputSwitching can be programmed to operate on anycombination of the cd, tuner, hdd and av input buttons.Mute silences the outputs and can be selected ordeselected by pressing the front panel mute button orremote handset mute key.7 . 4 Di s p l a yThe Supernait 2 front panel button illumination canbe switched off by pressing the remote handset (inpreamplifier mode) disp function. Any subsequent handsetor front panel operation will temporarily restore the display.A second operation of the disp function will restore thedisplay.To enable Automatic Input Switching, first switch theSupernait 2 into program mode by pressing and holdingthe handset prog key (with the handset in preamplifiermode). The front panel mute button will illuminate ifautomatic switching is already enabled. If it is not enabledit can be switched on by pressing the mute button.7 . 5 S w i t ch -onAfter switch-on the Supernait 2 will remain muted for 30seconds while control systems and circuits stabilise.With automatic switching enabled, pressing the mutebutton again will reveal the inputs selected for autoswitching by their indicators illuminating for a short time.Repeated operation of the mute button will sequentiallyselect through each possible combination of cd, tuner,hdd and av inputs and auto switching disabled (allindicators off). When the desired inputs selected for autoswitching are indicated, stop pressing the button.7 . 6 R em ot e C on t r olThe Narcom 4 remote handset supplied with theSupernait 2 duplicates all configuration and controlfunctions. See Section 18 for more information.7 . 7 Def a u l t sTo restore all Supernait 2 programmable settings to thefactory defaults press and hold the remote handset dispkey while the unit is in program mode. The Supernait 2 willexit from program mode following this operation.Automatic Input Switching only becomes operationalon exit from program mode by pressing and holding thehandset prog key.Note: The Supernait 2 will leave program modeautomatically if no control commands are received for fiveminutes.7 . 8 Fa u l t C on d i t i on sThe Supernait 2 will indicate fault conditions by flashingfront panel button buttons. The following table lists the faultindications.Note: In a few cases some further equipment configurationmay be required for auto switching to operate correctly.Please contact your retailer or local distributor for advice.FaultFlashing ButtonLink Plug or Power SupplymuteExcess TemperaturecdExcess Current tuner7.2 Handset Volume and Balance ControlThe remote handset volume and balance keys providesome alternative control characteristics. A short press andrelease of a key will adjust by a preset “nudge”, whilepressing and holding the key will result in three seconds ofslow adjustment followed by continual fast adjustment.E8
SU P E R N A IT 28 Specificat io nsPower Output:80W 80W RMS into 8ohms (135W 135W into 4ohms)Inputs:6 analogue line level suitable for 2V sources (0.5V to 7.0V)Headphones: Front panel 6.3mm (1/4”) jack socket suitable for 16Ω to 1kΩheadphonesAuxiliary Power Output: 24V on ‘aux 2 in & pwr’ for Naim phono stagesFixed Line Level Outputs:‘av out’ and ‘hdd out’Variable Line Level Outputs: ‘sub out’, ‘bi-amp out’ and ‘pre-amp out’Quiescent Consumption:37VADimensions (H x W x D):87 x 432 x 314mmWeight:13.9kgMains Supply:100V, 115V or 230V, 50/60HzFor full technical specifications please visit our ernait-2E9
NAIT XS 29 NAIT XS 2 Introd ucti o n, Instal l a ti on a nd C onnecti onThe Nait XS 2 is a very high performance stereo integrated amplifier that combines apreamplifier providing six line-level analogue inputs with a power amplifier rated at 70Watts per channel. The Nait XS 2 can be controlled by either its remote handset or by afront panel mounted volume knob and mute and input selection buttons. The Nait XS 2remote handset is described in Section 18 of this manual. A front panel 6.3mm jack socketenables the use of headphones with the Nait XS 2.A variety of power supply upgrade, alternative preamplifier and alternative or additionalpower amplifier options are possible for the Nait XS 2. Diagrams illustrating the connectionof some of these are shown in Section 11. If no power supply or alternative amplifieroptions are to be employed, the Nait XS 2 preamp/power amp link plug, supplied inthe accessory pack, must be fitted to the rear panel “preamp out” and “power amp in”sockets. The link plug is shown fitted in Diagram 10.2.Your Nait XS 2 should be installed on a dedicated equipment stand intended for thepurpose. Do not stand it directly on top of another item of equipment. Care shouldbe taken to ensure that it is level. The amplifier should be installed in its final locationbefore connecting cables or switching on. Ensure that the volume is turned down beforeswitching on.Note: The Nait XS 2incorporates an AVBypass switch on its rearpanel. The switch shouldonly be set to “On” if theamplifier is to be usedin conjunction with anAV processor in a hometheatre system. In allother installations theAV Bypass switch shouldbe set to “Off”. Speakerand amplifier damagemay occur if a signal isinadvertently connectedto the Nait XS 2 av inputwhile the AV Bypassswitch is “On”.9. 1 Mains P owe r C o nne c tio nConnect the Nait XS 2 to a mains power socket usingeither the mains cable supplied or a Naim Power-Line.9. 2 S ignal Inp utsThe Nait XS 2 front panel input buttons select the sourceinput signal to be routed to the integral power amplifierand the loudspeakers or headphones. The six buttons arelabelled cd, tuner, hdd (hard disk drive), av, aux 1 and aux 2.The cd, tuner, hdd and av input buttons correspond toparallel DIN and RCA phono input sockets on the rearpanel, while the aux 1 input button corresponds only to apair of RCA phono sockets.always be used. Naim speaker cable will provide the bestresults, however, a wide range of speaker cable types canbe used without risk of damage to the amplifier.Ensure when connecting speakers that they are “inphase”. That is, the positive and negative connectionorientation at both the speaker and amplifier ends of thecable is the same for both channels.9.4 av and hdd OutputsNote: The hdd and av sockets carry both inputs andoutputs. See Section 9.4 for more information.The Nait XS 2 av and hdd inputs have associated outputsthat enable the selected input signal to be routedexternally; to an audio recording component for example.The aux 2 input button corresponds to a DIN input socketon the rear panel. The aux 2 DIN socket also carries apower supply output intended to power a Naim Stagelineor SuperLine phono preamplifier.Note: The av and hdd outputs remain active whiletheir corresponding inputs are selected. Take care thata feedback loop is not inadvertently created by thesimultaneous selection of input and output.Note: For optimum sound quality DIN sockets should alwaysbe used in preference to RCA phono sockets.9 . 5 H ea d p h on e O u t p u tNote: Where an input has DIN and phono socket optionsonly one should be connected at any one time.The Nait XS 2 headphone output is able to drive themajority of headphone types. The 6.3mm (1/4”) jackAlways use high quality interconnect cables to connectsources to inputs. The Naim Hi-Line will produce the bestresults.socket, rather than the smaller 3.5mm jack socket, providesmore reliable connection and potentially higher soundquality. Most high-quality headphones are supplied with anadaptor that enables use with either 3.5mm or 6.3mm jacksockets. Inserting a headphone plug will mute theNait XS 2 speaker outputs. Removing the headphone plugwill restore the outputs.9. 3 S peaker OutputsA set of stereo speaker connection sockets is provided onthe rear panel. Custom Naim loudspeaker connectors aresupplied to make the connection and in order to complywith current European safety regulations these shouldE10
NAIT XS 29. 6 A V Bypass9 . 8 P ow er S u p p l y Up g r a d esThe Nait XS 2 can be integrated within a multi-channelhome theatre system, driving the front left and rightchannel speakers, by engaging its AV Bypass mode.AV Bypass m
This manual covers all integrated amplifiers. It begins with some general installation notes. Product specific information begins in Section 4. Introduction 1 Connections It is important for both safety and performance that the standard cables supplied are not modified. . RCA RCA RCA RCA
RF/IF Differential Amplifiers 5 Low Noise Amplifiers 7 Low Phase Noise Amplifiers 10 Gain Blocks 11 Driver Amplifiers 13 Wideband Distributed Amplifiers 13 Power Amplifiers 15 GaN Power Amplifiers 18 Variable Gain Amplifiers 19 Analog Controlled VGAs 19 Digitally Controlled VGAs 20 Baseband Programmable VGA Filters 21 Attenuators 22
RF/IF Differential Amplifiers 9 Low Noise Amplifiers 9 Gain Blocks and Driver Amplifiers 10 Wideband Distributed Amplifiers 11 Linear and Power Amplifiers 12 GaN Power Amplifiers 13 Active Bias Controllers 13. Variable Gain Amplifiers 14. Analog Controlled VGAs 14 Digitally Controlled VGAs 14 Baseband Programmable VGA Filters 14. Attenuators 15
Semiconductor optical amplifiers (SOAs) Fiber Raman and Brillouin amplifiers Rare earth doped fiber amplifiers (erbium – EDFA 1500 nm, praseodymium – PDFA 1300 nm) The most practical optical amplifiers to date include the SOA and EDFA types. New pumping methods and materials are also improving the performance of Raman amplifiers. 3
51.3 Types of Semiconductor Optical Amplifiers SOAs can be classified as either subthreshold or gain clamped. Subthreshold amplifiers are lasers operated below threshold, and gain-clamped amplifiers are lasers operated above threshold but used as amplifiers. Subthreshold SOAs can be further classified according to whether optical feedback .
Optical Amplifiers vs Regenerators (1 of 2) Transparent: Regenerators specific to bit rate and modulation format used; O-Amps are insensitive Easily upgraded: A system with optical amplifiers can be more easily upgraded to higher bit rate without replacing the amplifiers Optical amplifiers
sistor amplifiers. Thirty years ago, transistor amplifiers were all the rage and valve amplifiers had become passe. Anybody who was anybody was discarding their large, hot and fragile valve amplifiers for small, cool, and — generally far more expensive — transistor amplifiers. Mullard and Philips had released their OC16's, which
Semiconductor Optical Amplifiers There are two types of SOAs: --- Fabry- Perot amplifiers (FPA) When the light enters FPA it gets amplified as it reflects back and forth between the mirrors until emitted at a higher intensity. It is sensitive to temperature and input optical frequency.---Non-resonant traveling-wave amplifiers (TWA)
optical networks have been made possible by the optical amplifier. Optical amplifiers can be divided into two classes: optical fibre amplifiers (OFA) and semiconductor optical amplifiers (SOAs). The former has tended to dominate conventional system applications such as in-line amplification used to compensate for fibre losses.
