Naim Audio NAC-N 172 XS - Manual (Page 25)

E23
NAIT XS Integrated Amplifier
22.6 Auxiliary Inputs and Outputs
The NAIT XS incorporates pre-amp out and power-amp in
sockets on its rear panel. In normal use these sockets are
connected by a link plug. The link plug should be removed
only in the following circumstances:
• A power supply upgrade is to be used.
• An alternative preamplifier is to use the NAIT XS power
amplifier section.
• An alternative power amplifier is to use the NAIT XS
preamplifier section.
Diagrams 23.3 and 23.4 illustrate use of these sockets.
When an external preamplifier is connected to the NAIT XS
power-amp in socket, a fault will initially be indicated by the
mute button flashing. To clear the fault, press and hold the
flashing mute button. This will un-mute the amplifier and turn
off the display and volume indicator.
The NAIT XS provides an unfiltered analogue stereo
subwoofer output via a pair of RCA phono sockets.
Note: The subwoofer output is a duplicate of the
preamplifier output. No low-pass filtering is applied.
22.7 Power Supply Upgrades
The NAIT XS preamplifier section can be upgraded through
the connection of an external Flatcap, Hi-Cap or Supercap
power supply. Diagrams illustrating power supply upgrades
are shown in Section 23. The NAIT XS and external power
supply must be switched off when connections are made.
Switch on the external power supply first followed by the
NAIT XS when all connections are complete.
22.8 General Connections Notes
The NAIT XS negative input and output connections for each
channel are common. The mains earth (ground) should
always be connected regardless of what other equipment is
used in conjunction with the amplifier. The mains earth 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.
A signal ground connection is fitted to the NAIT XS rear
panel. This is intended to be used to connect a turntable
pick-up arm signal earth only.
23 NAIT XS Controls and Connections
23.1 NAIT XS Front
volume mute
source selection
aux 1 input socket