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12. NAIT 5si
The NAIT 5si is a very high performance stereo integrated amplifier that combines a preamplifier providing four line-level
analogue inputs with a power amplifier rated at 60 Watts per channel. The NAIT 5si can be controlled by either its remote
handset or by a front panel mounted volume knob and input selection buttons. The NAIT 5si remote handset is described in
Section 15 of this manual. A front panel 6.3mm jack socket enables the use of headphones with the NAIT 5si.
Your NAIT 5si should be installed on a dedicated equipment stand intended for the purpose. Do not stand it directly on top
of another item of equipment. Care should be taken to ensure that it is level. The amplifier should be installed in its final
location before connecting cables or switching on. Ensure that the volume is turned down before switching on.
12.1 Mains Power Connection
Connect the NAIT 5si to a mains power socket using either
the mains cable supplied or a Naim Power-Line.
12.2 Signal Inputs
The front panel input selector buttons select the source
input signal to be routed to the power amplifier and
the loudspeakers or headphones. The four buttons are
labelled cd, tuner, hdd (hard disk drive) and av. Each input
button corresponds to a pair of rear panel RCA phono
input sockets. The cd and tuner inputs are additionally
provided with parallel DIN sockets. These should be used
in preference to the RCA phono sockets if practical. Do not
connect both the DIN and RCA phono sockets of one input
simultaneously.
12.3 Speaker Outputs
A stereo set of speaker connection sockets is provided
on the rear panel. The sockets can accept standard 4mm
plugs, but to comply with European legislation the Naim
connectors supplied should be used. Naim Audio speaker
cable will provide the best results; however, a wide range of
speaker cable types can be used without risk of damage to
the amplifier.
Ensure when connecting speakers that they are “in phase”.
That is, the positive and negative connection orientation at
both the speaker and amplifier ends of the cable is the same
for both channels.
12.4 hdd Output
The NAIT 5si hdd input has an associated output that enable
the selected input signal to be routed externally; to an audio
recording component for example.
Note: The hdd output remains active regardless of which
input is selected. Take care that a feedback loop is not
inadvertently created by the simultaneous selection of
input and output. The hdd output will be silenced when
mute is engaged.
12.5 Headphone Output
The NAIT 5si headphone output is able to drive the majority
of headphone types. The 6.3mm (1/4”) jack socket, rather
than the smaller 3.5mm jack socket, provides more reliable
connection and potentially higher sound quality. Most
high-quality headphones are supplied with an adaptor that
enables use with either 3.5mm or 6.3mm jack sockets.
Inserting a headphone plug will mute the NAIT 5si speaker
outputs. Removing the headphone plug will restore the
outputs.
