NAIM Amplifiers Owner's Manual

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Contents

NAIM Amplifiers Owner's Manual Manual pdf 3 page image

12 Audio ConnectionsIt is important for both safety and performance thatthe standard cables supplied are not modified.2.1 Interconnect CablesIf options are available with your equipment and installation,DIN interconnect sockets should be used in preference to RCAPhono sockets. One end of each Naim interconnect cable ismarked with a band to establish its correct orientation. The banddenotes the end that connects to the signal source.Interconnect plugs and sockets should be kept clean and freefrom corrosion. The easiest way to clean them is to switch offthe equipment, pull the plugs out of their sockets, and pushthem back in again. Contact cleaners and “enhancers” shouldnot be used as the film they tend to deposit may degrade thesound.2.2 Loudspeaker CablesLoudspeaker cables are vitally important and your dealer shouldmake them up to suit your installation. The cables shouldeach be at least 3.5 metres long and of equal length. Therecommended maximum is normally 20 metres although longercables may be viable with some Naim amplifiers. Contact yourdealer or Naim Audio for advice.Many Naim amplifiers are designed only to work with Naimloudspeaker cable and using alternatives may degrade theperformance or even damage the amplifier. Naim loudspeakercable is directional and should be oriented so that the printedarrow points towards the speakers. The amplifier/loudspeakerconnectors supplied are designed to make a robust electro-mechanical connection and to comply with European safetyregulations. They should be used in preference to alternatives.3 Mains Power ConnectionWhere 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.IntroductionNaim Audio products are conceived with performance as the top priority.Careful installation will help ensure that their full potential is achieved.This manual covers all Preamplifiers, the Nait 5i Integrated Amplifier,all Power Amplifiers and all Power Supplies but begins with generalinstallation notes and statutory safety warnings for all Naim Audioproducts. Product specific information begins in Section 5.1 Equipment InstallationNormally your Naim Audio equipment will have been installed by the dealer who soldit to you - even if you live outside their immediate vicinity. In any event howeveryour dealer is responsible for making sure that the system sounds as it should.Information given here is not intended to reduce this responsibility in any way.3.1 Mains Plug WiringIn some territories a mains plug may need to befitted to the supplied mains lead. As the colours ofthe wires in the mains lead may not correspond withthe coloured markings identifying the terminals in theplug proceed as follows:The wire which is coloured GREEN-AND-YELLOW must beconnected to the terminal in the plug which is marked by theletter E or by the safety earth symbol or coloured GREEN orGREEN and YELLOW.The wire which is coloured BLUE must be connected to theterminal in the plug which is marked with the letter N orcoloured BLACK.The wire which is coloured BROWN must be connected to theterminal in the plug which is marked with the letter L or colouredRED.3.2 Non-rewirable Mains PlugsIf a non-rewirable plug is cut from a mains lead (for whateverpurpose) the plug MUST be disposed of in a way to render ittotally useless. Considerable shock hazard exists if the cut-offplug is inserted into a mains outlet.3.3 Mains Circuits and CablesA hi-fi system usually shares a mains circuit with otherhousehold equipment, some of which can cause distortion ofthe mains waveform. This distortion can lead to mechanical humfrom amplifier and power supply transformers. Naim transformersare large in size with heavy gauge windings, making themrelatively sensitive to such distortion and it may be necessary totake account of any hum when siting your equipment.Transformer hum is not transmitted through the speakers andhas no effect on the performance of the system; however, aseparate mains circuit may reduce it. Such a circuit (ideally witha 30 or 45 Amp rating) will also improve system performance.Advice on the installation of a separate mains circuit should besought from a qualified electrician.Do not substitute alternative mains leads and plugs tothose supplied. They are selected to offer the best possibleperformance.