NAIM Amplifiers Owner's Manual

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NAIM Amplifiers Owner's Manual Manual pdf 20 page image

18NAIT 5i20 Installation and OperationThe NAIT 5i Integrated Amplifier should be installed on a dedicated equipment standintended for the purpose. Care should be taken to ensure that it is level. The NAIT5i can be operated from its internal power supply only. No power supply upgrade ispossible.20.1 InputsThe front panel input selector buttons select the source inputsignal to be routed to the power amplifier and the loudspeakers.The four buttons are labelled cd, tuner, tape and av. Each inputbutton corresponds to a pair of rear panel RCA Phono inputsockets. The cd and tuner inputs are additionally provided withalternative DIN sockets. These should be used in preference tothe RCA Phono sockets if practical. Do not connect both the DINand RCA Phono sockets of one input simultaneously.20.2 Automatic Input Switching (Program Mode)The NAIT 5i incorporates an optional automatic input switchingfeature which can select the appropriate input as soon as anyhandset function for a particular Naim source component isoperated. For example, if the tuner input is selected on theNAIT 5i and the cdplay key is operated on the handset, the NAIT5i will automatically switch to the cd input. Automatic inputswitching can be set up to operate on any combination of thecd, tuner and av inputs.To enable automatic input switching, first switch the NAIT 5i intoprogram mode by pressing and holding either the prog key onthe remote handset (handset in preamplifier mode) or the cdbutton on the amplifier front panel. Program Mode is indicatedby a flashing indicator on the front panel volume control. If nofunction is operated within five minutes of entering programmode the NAIT 5i will return to normal mode automatically.The front panel tape button will illuminate if automatic inputswitching is already enabled. If it is not enabled it can beactivated by pressing the handset 3 key or front panel tapebutton twice.With automatic input switching enabled, pressing the 3 key orthe tape button will reveal the inputs selected for automaticinput switching by their button indicators illuminating for ashort time. Repeated operation of the 3 key or tape button willsequentially select through each possible combination of cd,tuner, and av inputs, and automatic input switching disabled (cd,tuner and av indicators off). When the desired inputs selectedfor automatic input switching are indicated, stop pressing thekey or button.To disable automatic input switching, press the 3 key or tapebutton repeatedly until no other buttons are illuminated.Automatic input switching only becomes operational or iscancelled on exiting from program mode by pressing and holdingthe handset prog key or front panel cd button.20.3 AV Integration (Unity Gain)The Unity Gain function enables an audio-visual processor to beintegrated with the NAIT 5i such that its volume control takesover command of signals connected the amplifier’s AV input.To select unity gain, first switch the NAIT 5i into programmode as described in Paragraph 20.2. The AV input button willilluminate if unity gain is already enabled. If it is not enabledit can be activated by pressing the handset 4 key or the frontpanel AV button. Deselect unity gain by again pressing the 4key or the AV button. Unity gain only becomes operational or iscancelled on exiting from program mode by pressing and holdingthe handset prog key or front panel cd button.Note: The unity gain feature must be used with care. It effectivelyby-passes the NAIT 5i volume control leaving any signal connectedto the unity gain input to be passed to the power amplifier andspeakers at full volume. Additionally, if an input is selected whichhas unity gain enabled, the volume handset functions will bedisabled and their indicators will turn off. This will be flagged by thevolume indicator flashing if its handset keys are used.20.4 Restoring DefaultsThe programmable functions can be restored to their default,(inactive) states by pressing and holding the front paneltuner button or the handset disp key (handset in preamplifiermode) while the NAIT 5i is in program mode.20.5 OutputsA stereo set of speaker connection sockets are provided on therear panel. The sockets can accept standard 4mm plugs, but tocomply with European legislation the Naim connectors suppliedshould be used. Naim Audio speaker cable will provide the bestresults, however, a wide range of speaker cable types can beused without risk of damage to the amplifier.Ensure when connecting speakers that they are “in-phase”. Thatis, the positive and negative connection orientation at both thespeaker and amplifier ends of the cable is the same for bothspeakers.The tape output always carries the selected input signal. No“record monitor” function is available.20.6 Volume and Mute ControlThe remote handset vol keys provides some alternative controlcharacteristics. A quick key press and release will adjust thevolume incrementally. A quick key press and release followed bypress and hold will provide continual slow adjustment. Simplepress and hold will provide continual fast adjustment.Mute control is available from the remote handset only. Mute isindicated by the amplifier volume control indicator flashing.Note: The NAIT 5i does not incorporate any facility for channelbalance adjustment.