Naim Audio NAIT 2, NAP 90, NAP 140, NAP 250, NAP 135 audio amplifier, NAC 62, NAC 72 preamplifier, HI-CAP, NA PST power supply, NAT 01, NAT 02 tuner, NAXO crossover, SNAIC interconnect cable, NAC A5 speaker cable Owners manual
NAIT 2, NAC 62, NAC 72, NAP 90, NAP 140, NAP 250, NAP 135, HI-CAP, NAXO 2, NAXO 3, NAT 02, NAT 01, NA PST. This manual provides information on using and maintaining your Naim hi-fi equipment. It covers topics such as installation, connections, and troubleshooting. Please read the WARNINGS section carefully before using your equipment.
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Noim aucio owners manual io have been manufacturing hi-fi electronics in the cathedral city of Salisbury im Aud since 1971 Na ipment that we sell is designed and made by us in our own factory, f manufacture is under our direct control. All the equ very aspect o where e GLOSSARY Many of the product names are acronyms. Below is a current list. NA Naim Audio NAC Naim Audio Control unit NAP Naim Audio Power amplifier - NAT Naim Audio Tuner NA PST Naim Audio Power Supply Tuner NAXO Naim Audio cross(X) Over NAIT Naim Audio InTegrated amplifier SNAIC Super Naim Audio Interconnect Cable HI-CAP High CAPacity power supply The power amp type numbers are derived from the rated power into 40 both channels driven. NAP 90 = 45 + 45 watts NAP 140 = 70 + 70 watts NAP 250 = 125 + 125 watts 1 HV = 1 microvolt = 0.000001V NAP 135 (mono) = 135 watts 1 mV = 1 millivolt = 0.001V OLDER EQUIPMENT Amplifiers: the NAP 110, 120 and 160 are similar in operation to the NAP 140. Preamplifiers: the NAC 12, 22, 42 and 42-5 are similar in operation to the NAC 62, but have three inputs instead of four. The 32 and 32-6 are similar in operation to the 72. The 32-5 and 42-5 are suitable for use with the HI-CAP dual power supply option (see page 13). 2 NAIT 2 NAC 62 NAP 90 000 00 a NAT 02 NAC 72 NAP 140 C1 00 NA PST NAXO NAP 250 = = = » NAT 01 HI-CAP NAP 135 {9 if = = INSTALLATION INSTRUCTIONS Please keep this manual safely. It will help you get the best out of your hi-fi system. It contains some general advice and guidance as well as instructions, and we hope you will find it useful for reference. Please read the section entitled WARNINGS carefully, before y using the system. YOUR DEALER Normally your Naim equipment will have been installed by the dealer who sold it to you, even if you live outside his immediate area. Your dealer is responsible for making sure that the system sounds exactly as it should, and information given here is not intended to reduce this responsibility in any way. CABLES AND CONNECTIONS Please do not modify the standard interconnect cables supplied with amplifiers and power supplies, either the type of wire or length. This is important for safety as well as performance. One end of each cable is marked with a strip of tape, to establish its direction. The tape markes the end that goes towards the source. (This is explained further in sections for amps and power supplies.) Speaker leads are also very important. Naim Audio speaker cable and speaker cable plugs are correct for your system. Your dealer will make up leads to your own requirements. They should be at least 3.5 metres long and of equal length. Like interconnect leads, they are directional, and should be connected so that the printed arrow points towards the speakers. Incorrect cable will degrade performance, and some types may damage your amplifier. The speaker plugs supplied with all our amplifiers have been very carefully designed to . make a robust mechanical connection between speaker lead and amplifier. Please note that bi-wiring (or tri-wiring) presents severe mechanical problems, as well as reducing safety margins and in many cases degrading sound. It should be approached with the greatest caution. Only our own cable, or cable known to have equally low capacitance, should be used, and only with speakers properly designed for this purpose. Handle such leads very carefully. | 4 The plugs and sockets that come with your equipment have been chosen because they make the best possible connection for their purpose. A poor contact will degrade the signal substantially, and plugs and sockets should all look clean and free from dirt and corrosion. The easiest way to clean them is to switch off the equipment, pull the plugs out of their sockets and push them back in again. Special contact cleaners and “enhancers” should not be used, they deposit a film which degrades sound and is very difficult to remove. The connection between arm and cartridge is particularly important, but also delicate, so ask your dealer to see to maintenance. TURNING ON AND OFF Always switch the amplifier off before plugging (or unplugging) anything into the system, and wait about a minute for the power-supply capacitors to discharge. If you have a separate power supply for your pre-amp, it’s best to switch the power supply on first, and then the power amplifier. When turning off switch the amplifier off first, then the power supply. Some people prefer to leave the power supply for the preamp turned on permanently: the pre-amp takes a few hours to “warm up” properly, so leaving it on provides more consistent performance. If you have a system without a separate power supply, the pre-amp is being powered by a smaller supply inside the amplifier, and “warming up” is less important. It's worth remembering that all electronic equipment can be damaged by lightning, including the electronic components of your hi-fi system. The amplifier is the most likely victim. Its mains lead should have an independent wall socket, so that it can be turned off when not in use, while the power supply (HI-CAP) is left on. For complete protection from lightning the mains (house current) plugs of all equipment should be pulled out, not just switched off, and any aerials disconnected. 5 MAINS SUPPLY Where fused plugs are used, 13 amp fuses should be fitted. Smaller ones will fail after a period of use. A hi-fi system usually shares a ring main with other household equipment, some of which can cause distortion of the mains wave-form, leading to mechanical hum from the transformers in amplifiers and power supplies. This hum is not transmitted through the speakers, has no effect on thé system, but is purely local to the transformer itself. A separate fused spur from the consumer unit (like the spur reserved for electric cookers) may reduce transformer noise. It's also worth bearing in mind that current from such a spur (ideally with a 30 amp rating) is cleaner and has lower impedance that that supplied on a ring main, and will improve performance. Please don't wire V.D.R.s (voltage dependant resistors) into mains plugs, they degrade the supply, and the music. HOW TO SITE EQUIPMENT Power supplies and amplifiers need to be kept at a reasonable distance from the pre-amp, or their transformer fields will interfere with it, and cause hum audible from the speakers. 12" (300mm) is the minimum distance and that allowed by the standard interconnect lead is the maximum. Turntables and loudspeakers should be sited according to manufacturer's instructions. There are two main objectives to bear in mind. The first is to keep the piece of equipment concerned absolutely stationary, in spite of its tendency to move in reaction to the forces being generated in it. The second is to avoid the equally unpleasant interreaction that will occur if equipment is coupled to large masses such as walls or heavy pieces of furniture. Placing a turntable on a large solid chest may meet the first objective but be horrible in terms of the second, so beware. Improved design of turntables and speakers will eventually reduce the problems of acoustic coupling. Meanwhile, you will probably find that your turntable is best placed on a light but rigid surface such as a small, well-made coffee table. If a shelf is used it should be rested on its 6 supports rather than being fixed to them (to avoid coupling the shelf to the large mass of the wall behind.) The supports should be as nearly as possible under the feet of the turntable, to discourage the shelf from flexing. There are many specialist tables and stands available. There should only be one pair of loudspeakers in the room. Please remember that each extra speaker in your listening room, even those in your TV set or telephone, will have a disproportionately confusing influence on sound waves. SOURCES The source of your music, whether record and turntable, broadcast and tuner, tape, tape deck or other, is the basis on which all the rest of the system depends. Turntables need particular care, and your dealer should check that your own is properly set up every time you improve any other part of the system. WHEN YOU HAVE A PROBLEM Legal consumer protection varies from country to country. In most places where our equipment is supplied, the dealer must be prepared to take back any Naim equipment he has sold you, at the time of sale, if he cannot make it work to YOUR satisfaction in your own home. A problem may be due to a fault in any part of your system, or its siting, so it is essential to make full use of your local dealer's diagnostic skills on site. Please contact your local distributor, or Naim Audio Ltd at the address in this manual, if any difficulties cannot be resolved. Much of our equipment Is now made in special versions for different countries, adding to other obstacles that make it impracticable to arrange international guarantees, so please make sure of your position with your own dealer NOW, at the time of sale. We are always available to help and advise. It is essential that repairs and modifications should only be carried out by an authorised Naim dealer, or at the factory by Naim Audio. Many components are made, tested or matched specially, and suitable replacements can only be obtained through ourselves. CASE MAINTENANCE Use a soft foam sponge that has been sprayed with an ordinary wax household polish. Fascia panels should be wiped with a soft dry cloth. 7 INTEGRATED AMPLIFIER An integrated amplifier has both the power amplifier and preamplifier stages of amplification fitted into a single case. This apparent simplicity requires a great deal of cunning. We hope you will enjoy your NAIT 2 as much as Naim enjoyed designing it. Low continuous power output is balanced by a very large peak current capacity, so there are no restrictions on the size or type of loudspeakers that may be used. But please don’t expect the impossible. If you demand too much volume from your Nait using difficult speakers, the results will be increasingly disappointing. FACILITIES The Nait 2 has four switch selectable inputs, a phono input for moving magnet cartridges, a tuner input, a tape input and an auxiliary high level input suitable for use with compact disc, cdv or hi-fi video. The tape socket combines input and output for recording and play back. Tuner, tape and auxiliary connections are via 5-pin DIN sockets. Phono input is via RCA jack sockets. For loudspeaker leads and connections, please see the notes about cables in the INSTALLATION INSTRUCTIONS section headed CABLES AND CONNECTIONS. The tape monitor switch allows you to listen to the output of the tape recorder while recording the source you have chosen with the selector switch. This can be useful with a 3-head tape machine to monitor the “off-tape” signal while making a recording. With the monitor switch set to “mute”, there will be no output to the speakers, from any input. A simple retro-fittable conversion is available from dealers, switching the NAIT 2 to “preamplifier- out” operation. lts control section can then be used with one of our larger power amplifiers such as the NAP 90 or NAP 140. Please consult your dealer for details. 8 » LOUDSPEAKERS CH1LEFT CH2RIGHT TAPE AUX TUNER PRE-AMP OUTPUT CH 1 LEFT PHONO 5000 00 MAINS GROUND NAIT 2 Input sensitivities Phono: 2.5mV, 47k ohms. Aux, Tuner and Tape: 75mV, 47k ohms. Tape output level and impedance: 75mV, 1k ohm/source. The mains (house current) fuse is fitted inside the case. NEVER REMOVE THE NAIT'S COVER UNTIL ITS MAINS LEAD HAS BEEN DISCONNECTED FROM YOUR HOUSE CURRENT. The mains earth (ground) should always be connected regardless of what other equipment is used with the NAIT 2. Mains supply: 100V,110V,120V,200V,220V or 240V, 50 or 60Hz Case size: 76mm x 206mm x 276mm PRE-AMPLIFIERS Naim Audio preamplifiers may be used with a variety of power amplifiers besides our own. They require an external regulated power supply. The power supply for your preamp is very important to its performance. The Naim NAP 90 and 140 power amplifiers have a suitable regulated supply for the preamplifier built into them, though you may use a separate power supply if you wish. If you are using a Naim NAP 250 or 135 (or an amplifier made by another manufacturer) you will need a Naim HI-CAP preamp power supply. More information about Power Supplies is on page 13. A Link Plug is supplied with your preamp to fit the 240° 5 pin DIN socket on the right of the rear panel (the socket used for connection to a HI-CAP.) Leave the Link Plug in place unless you have a HI-CAP. Removing it will not cause any damage, but the preamp cannot function. PHONO TUNER AUX TAPE CH1 (LEFT) GROUND CH2 (RIGHT) OUTPUT VIA 5 PIN SNAIC OUTPUT VIA 4 PIN SNAIC NAC 62 BASIC PREAMPLIFIER FACILITIES The NAC 62 has four switch-selectable inputs, for phono, tuner, auxiliary and tape. The auxiliary input is suitable for use with compact disc. The tape socket combines input and output for recording and replay. There is a mute/monitor switch. 10 o AE o OCC aC eo pe СОН > a eee 3 Ee PHONO AUX TUNER TAPE 1 TAPE 2 CH1 (LEFT) OUTPUT VIA 5 PIN SNAIC GROUND CH2 (RIGHT) OUTPUT VIA 4 PIN SNAIC NAC 72 The NAC 72 has five switch-selectable inputs, one for phono, one variable auxiliary, one for tuner and two buffered inputs for tape. The auxiliary input is particularly suitable for compact disc, but either tuner or tape inputs may be used if desired. Tape sockets combine input and output for recording and replay. TAPE FACILITIES AND MONITOR SWITCH Tape input sensitivity 75mV, 100k ohms. Tape output level and impedance 75mV, 600 ohms. The tape monitor switch allows you to listen to the output of the tape recorder whilst recording the source that you have chosen with the selector switch. This can be useful with a 3-head machine to monitor the “off-tape” signal while making a recording. I In the “normal” position, the source selected will be fed to the power amp. In the “monitor” position, the output from tape 1 will be heard, unless tape 1 is chosen on the selector switch, when the output of tape 2 will be heard. With the monitor switch set at “mute”, there will be no output to the speakers, from any input. 11 PHONO OPTIONS The following types of board to suit different inputs, are completely interchangeable in all preamps: Sensitivity Impedance NA 323S for low-output moving coil cartridges 100 uV 470 ohms NA 322 for high-output moving magnet cartridges 2 mV 47K ohms NA 323K for Linn Karma and Troika cartridges 100 uV 560 ohms NA 326 for high-level inputs 75mV 100K ohms NA 328 has variable sensitivity for high-level inputs 25 mV-375 mV 47K ohms The pre-set on the NA 328 should be adjusted using a small insulated shaft screwdriver; turn anti- clockwise for maximum gain, clockwise for minimum gain. Turn fully clockwise for use with CD players. HEADPHONES For low impedance headphones see POWER AMPLIFIER section. Headphones with an impedance of 600 ohms or higher can have a specially wired 4 or 5-pin connection straight to the preamplifier. Please consult your dealer. | CONNECTIONS Please read the paragraphs headed CABLES AND CONNECTIONS in the INSTALLATION INSTRUCTIONS section. Never disconnect any leads, except the mains (house current) lead or move equipment about in such a way as to disturb connections, unless the amplifier is switched off. Naim preamplifiers use BNC sockets for phono input. If your tone arm cable has an unsuitable termination, your dealer will convert it with the BNC plugs supplied. Output to the amplifier is delayed until voltages in the preamplifier have reached operating level, when you will hear a noticeable soft “plop” as the relay circuit allows the preamp to turn on. OTHER SPECIFICATIONS Tape, tuner, and NA 326 conversion of phono input, will accept up to 7.5V rms and are thus suitable for the output from a professional tape recorder or a compact disc player. Overload margins: 40dB on all inputs at all audio frequencies. Main outputs: Level: 1V Impedance: 47 ohms. Case size: 76 mm x 205mm x 300mm. 12 HI-CAP (old label) An adequate and correctly ch 1 7 Te Tue designed power supply is ue o = tremely important to th £ % 3 4 performance of the preamplifier. A separate power supply is not ONE AMP : Socket 2 to Amp. Socket 3 to Pre-Amp. i I ifi TWO MONO AMPS: Sockets 1 & 2 to Amps. Socket 3 to Pre-Amp. required when Tam praamplifices NAXO 2 or 3 : Socket3to Naxo. Socket2to Pre- -Amp power supply. are used with the NAP 90 or SOCKET 4 : To equipment marked “HI-CAP Socket 4”. 140, but optional use of the FUSE 120V-8.0 Amp. antisurge. 240V-4.0 Amp. antisurge. : A.C. CONSUMPTION : 25 W. D.C. (+ve):24V. 500ma. HI-CAP 24V supply offers the benefit of a larger and quieter SOCKET 4 : This applies to NAC 67,72 and -4 -5 and -6 products. RO REA. SOCKET3 : Suitable for older types of equipment. The HI-CAP is a large dual 24V supply for use with preamplifiers, or NAXO crossovers. An alternative socket is provided for earlier preamplifiers or crossovers. HI-CAP (new label) DESIGNED & MADE BY NAIM AUDIO LTD, SOUTHAMPTON RD, SALISBURY, ENGLAND TYPE HI-CAP S/No DISCONNECT SUPPLY CORD BEFORE OPENING ATTENTION DEBRANCHER AVANT Ch 1 a 1 Ch 1 e D'OUVRIR cha Ch Ch Le Ch 1 a 2 —ve 7 SOCKET 1 SOCKET 2 SOCKET 3 © 4 FUSE RATING ANTISURGE —— PASSIVE —— —— PRE-AMP —— 100 TO 120V: 8A(T) 200 TO 240V: 4A(T) AMP 1 AMP 2 4 PIN DIN OR 5 PIN DIN ACTIVE —— L— МАХО A.C. ONLY ~ FREQ: 50/60 HZ. I/P POWER: 25 V.A. OTHER THIS EQUIPMENT IS DESIGNED TO CONFORM TO BS 415. 1979. HI-CAP 13 CABLE CONNECTIONS TURNTABLE=1 NAIT 2 / — e ———- O O <A ( - a free fm ma TAPE #1 \ / : NAIT 2 (as pre-amp) i 59 Senn... — meme Eoooo[ 77 \ : 1— O 000 O ————— 7 i = я: = I ; NAT 02 EN / NAC 62 i HI-CAP ! . < ! = 90 ...... : \ om A O 00 O _—— Тоны A = a y Ob fr © ® ® 1 E EE ! ; — NAT 01 : \ NACT2 0 * / 1 O a = I l E O. Ooo O" NA PST ° o KEY TO CONNECTING CABLES | EE ==—-==-=====—==— As supplied em SNAIC 4 to 4 pin DIN а в Лай el «са ик у в SNAIC 5 to 5 pin DIN 4 pin DIN to 3 pin XLR 14 NAP 90 or 140 oJ NAP 90 or 140 oO =— J Y NAP 250 oc NAP 135 - | == a NAP 135 = TO LOUDSPEAKERS oc NAC A5 Speaker Cable s0ueur wave desc we AS SUpplied — for full interconnection details see tuner manual. BI-AMP CABLE CONNECTIONS NAP 250 NAC 72 = rer es rn or МАС 62 : HI-CAP : 2000000 n 9990 | 1 2 3 4 od jp — | — т, — | | r iS Sm mn mw en 71 HI-CAP | | | n 0900 00000 = 1 2.3.9 = 4 NAXO 2-4 CH 1 LF HF CH 2 LF HF Qp O ap AP О | Of nap 250 О о Er e LL LU > Y < < a a N N Р Р VV Y Y KEY TO CONNECTING CABLES SNAIC Eta 5 pin DIN © Ders EHE m a SNAIC 4 to 4pinDIN + -------------------=--- 4 pin DIN to 3 pin XLR NAC A5 Speaker Cable 16 FOUR-PACK CABLE CONNECTIONS NAC 72 à E EL HF = ==) NAP 135 35 2O000 < = TO SPEAKERS CH 1 i Неве, POH LF LS >) NAP135 HI-CAP - 0 ©9990 1 2 3 A E Dec 99 5 xX | HF [= >} NAP135 | | | HI-CAP | TO SPEAKERS CH 2 оо99|----/-/. = 99% Y О 1 2 3 4 | LF О = NAP 135 | | | НЕ СН 1 | О О НЕ СН 2 «Fr. LECH2 INPUT LFCH 1 NAXO 2-4 17 TRI-AMP CABLE CONNECTIONS NAC 72 pes or NAC 62 9900000 0999 O _ _ 1 23 4) HI-CAP | : NUI | & 0000 Ó 000000 1 2 3 4] HI-CAP 41 NAXO 3-6 CH1AMP LF MF CH2AMP LF MF НЕАМР CH1 CH?2 oO QP ор О aß QP О i o| 0 3 ol la О © МАР 250 e NAP 250 о МАР 250 Y y y т < 3 a a o Y N wn | ° 9 NV Y Vv Y v N KEY TO CONNECTING CABLES SNAIC 5 to 5 pin DIN ee _ SNAIC 4to 4pinDIN ---------------------—- 4 pin DIN to 3 pin XLR NAC A5 Speaker Cable 18 SIX-PACK CABLE CONNECTIONS NAC 72 or NAC 62 HF el SH 0000 TR 09 оо 9 О С МАР 135 HI- | - = = CH 2 a TO SPEAKERS QP DTO [Eras CS) ap 128 HI-CAP | MF CH1 CH2 : O O O Of--= = ==-=]-; mm A e I n OSOS | О МАР 135 | CH1 CH2 я OOOOOQG| NAXO aa SS QC SAE NAP 135 1532255) LF ~ CHT CH2 > 2296299 = ae EE Fine 1 00 ap (Y) NAP 135 CH1 CH2 , OO ap xX) ME A NAP 135 > 19 POWER AMPLIFIERS Naim Audio power amplifiers should only be used with Naim pre-amplifiers. This is very important, since operating conditions for the amplifier are defined by the pre-amplifier. The use of a passive volume control is not recommended. It will seriously limit the bandwidth in the audible region, and the stability of the amplifier may be compromised. Any damage resulting from use without a Naim pre-amplifier is likely to invalidate warranties. GENERAL The negative input and output connections are all common. The mains earth (ground) should always be connected regardless of what other equipment is used in conjunction with Naim power amplifiers. This only grounds the case and the electrostatic screen within the transformer, and is not connected to the signal negative. In order to avoid hum loops, the signal negative of the whole system should be connected to the mains earth (ground) in ONE place. This will normally be at the turntable. CONNECTIONS The NAP 90 and 140 can be used with or without a separate pre-amp power supply. When they are used on their own, the signal is carried from the pre-amp to the power amp using the SNAIC-4 interconnect lead supplied, and the same lead takes the DC supply from the NAP 90 or 140 to power the pre-amp. OUTPUT TO SPEAKERS MAINS INPUT AND FUSE CH 1 CH 2 +24V —VE INPUT CH2+VE CH1+VE NAP 140 20 When the 90 or 140 is used witha HI-CAP to power the preamplifier, the SNAIC-4 interconnectt takes the signal from the power supply instead of from the pre-amp. Please see the diagrams on pages 14 and 15. The NAP 250 and 135 are always used with a separate power supply for the preamplifier. The signal is taken from the power supply via a 4 pin DIN to 3 pin XLR interconnect. When connecting a pair of NAP 135s to their HI-CAP, make sure that one of the XLR leads from the HI-CAP goes to the socket marked ‘Left Channel’ on one NAP 135 and the other XLR lead goes to the socket marked ‘Right Channel’ on the other NAP 135. DO NOT USE NON-STANDARD INTERCONNECTING LEADS. DO NOT UNDER ANY CIRCUMSTANCES PLUG OR UNPLUG THE INPUT WHILE THE AMPLIFIER IS TURNED ON, OR DAMAGE MAY RESULT TO BOTH THE AMP AND SPEAKERS. PROTECTION If the cases of the NAP 140 or 250 reach 70°C due to prolonged running at high dissipation, the mains supply will be interrupted and the indicator light will go off until the amplifier has cooled down. This may take up to 30 minutes. There is no need to turn the amplifier off, but the sudden return of full volume when it has cooled down can be surprising, and you may prefer to turn down the volume on the pre-amp. The regulated power supplies in the NAP 250 will shut down if more than 17 amps is drawn for more than 10 microseconds, but the indicator light will not go off. To reset, turn the amplifier off for 1 minute. OUTPUT TO SPEAKERS MAINS INPUT AND FUSE CH1 CH2 CH1 —VE INPUT NAP 250 CH? 21 In the NAP 135, fan speed is increased in response to an increase in amplifier dissipation. If the heatsink of the NAP 135 reaches 70°C due either to prolonged running at very high dissipation, blocked airflow, or fan failure, the mains supply will be interrupted and the indicator light will go off until the amplifier has cooled down. This may take up to 30 minutes. There is no need to turn the amplifier off, but reducing volume will avoid surprises. The regulated power supply will shut down if more than 18 amps is drawn for more than 10 microseconds, but the indicator light will not go off. To reset, turn the amplifier off for 2 minutes. LOW IMPEDANCE HEADPHONES Introducing any form of switch in the output of the amplifier degrades sound quality, so if you wish to use headphones with Naim amplifiers, the loudspeakers must be disconnected and the headphones substituted. Care is required in the choice and use of headphones, both for safety and satisfactory results. Some electrostatic headphones have a combination of reactance which is not isolated by normal speaker cables, giving an unbalanced frequency response. It should also be borne in mind that Naim amplifiers have a common earth, so if headphones with a common earth are connected the wrong way round, both headphones and amplifier may be damaged. SPEAKER CABLE For best results Naim Audio’s own speaker cable should be used to connect a loudspeaker to the output of the amplifiers. Alternatively use two conductors of 4 sgqmm single core multistrand wire (R.S. type 360-396) lightly twisted together, about 4 turns per metre. Suitable 4mm connectors are supplied to make the connection to the amplifier. DO NOT, FOR ANY REASON, USE SO CALLED HIGH DEFINITION WIRE OR ANY OTHER SPECIAL CABLE BETWEEN AMPLIFIER AND LOUDSPEAKER. INPUT MAINS INPUT AND FUSE CH 1 LEFT or CH 2RIGHT OUTPUT TO SPEAKERS E e of AIR INLET je Y FAN NAP 135 22 Naim Audio Equipment is designed to offer the finest sound quality that can be achieved, avoiding compromise whenever possible. This can lead to situations that may be unfamiliar. The material that follows contains advice and information specifically related to Naim equipment, as well as more general warnings about the use of domestic amplification, so please read it carefully. 1. Naim pre-amplifiers are supplied with BNC sockets on the phono input. The impedance of the more common RCA (phono) socket does not match the majority of arm cables, and your BNC sockets MUST be used if you wish to realise the full potential of your Naim equipment. Their method of operation also provides a slight extra safety factor. Unlike the BNC, the RCA socket breaks the ground before the signal, and can therefore cause damage to speakers if plugged or unplugged while the equipment is turned on. . The transformers in the amplifiers and power supplies may sometimes make a mechanical noise caused by distortion of the mains (house current.) Naim transformers are large in size and have large gauge secondary windings, making them quite sensitive to this distortion. A separate spur from your consumer unit for your Hi-Fi system can often reduce the effect, while also giving an overall improvement in sound quality, but it may be necessary to take account of mechanical transformer noise when siting your equipment. In some circumstances you may experience Radio Frequency interference, depending on where you live and the earthing arrangements in your home. Controls on broadcasting in some countries allow very high levels of RF, and the choice and especially the exact siting of equipment may become critical. If there is a problem in your area, arrange for a home demonstration before purchase to find out if your Naim equipment will be affected. RF interference is related to the wide internal bandwidth required for good amplification, and in general moving magnet pre-amps and passive systems are less likely to suffer. An RF kit is available for some Naim equipment, but sound quality will be progressively compromised. In extreme situations customers may find Naim equipment unsuitable. . The electronic components of your hi-fi system can be damaged by lightning. The amplifier is particularly sensitive to adverse conditions during an electrical storm, and should always be turned off when not in use. For complete protection, the mains (house current) plugs of all equipment should be pulled out, and any aerials disconnected. . Whenever connecting or disconnecting either your Naim electronics or ancillary equipment ALWAYS switch off the power first, then wait at least one minute before proceeding. EQUIPMENT IS DESIGNED TO CONFORM TO BS415:1979 AND SIMILAR INTERNATIONAL SAFETY REQUIREMENTS. FOR YOUR OWN SAFETY, DO NOT UNDER ANY CIRCUMSTANCES OPEN NAIM EQUIPMENT WITHOUT FIRST | DISCONNECTING THE MAINS (HOUSE CURRENT). DO NOT UNDER ANY CIRCUMSTANCES ALLOW ANYONE TO MODIFY YOUR NAIM EQUIPMENT WITHOUT FIRST CHECKING WITH YOUR DEALER, DISTRIBUTOR OR THE FACTORY. 23 IX) naim audio ltd SOUTHAMPTON ROAD SALISBURY ENGLAND SP12LN TEL (0722) 332266 TELEX 477811 NAIM G ">

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Key features
- Four switch selectable inputs
- Phono input for moving magnet cartridges
- Tuner input
- Tape input
- Auxiliary high level input for use with compact disc, cdv or hi-fi video
- Tape monitor switch
- Preamplifier-out operation
- Suitable for use with a variety of power amplifiers
- External regulated power supply
- Large dual 24V supply for use with preamplifiers, or NAXO crossovers
Frequently asked questions
Connect the turntable to the NAIT 2 using the SNAIC-4 interconnect lead supplied. The tape mark on the cable should point towards the source.
The tape monitor switch allows you to listen to the output of the tape recorder while recording the source you have chosen with the selector switch. This can be useful with a 3-head tape machine to monitor the “off-tape” signal while making a recording.
The use of a passive volume control is not recommended. It will seriously limit the bandwidth in the audible region, and the stability of the amplifier may be compromised.