E11
NAIT XS 2
9.6 AV Bypass
The Nait XS 2 can be integrated within a multi-channel
home theatre system, driving the front left and right
channel speakers, by engaging its AV Bypass mode.
AV Bypass mode enables a home theatre processor to
take over volume control of signals connected to the Nait
XS 2
av
input. It is engaged using the switch on the rear
panel. The Nait XS 2 volume control indicator will extinguish
when AV Bypass mode is engaged and the av input is
selected. The remote handset volume control will also be
disabled.
Note:
The AV Bypass feature must be used with care. It
bypasses the Nait XS 2 volume control leaving any signal
connected to the av input to be passed to the speakers at
full volume.
Note:
Inserting a headphone plug while AV Bypass mode
is selected temporarily returns the Nait XS 2 to normal
operation. Removing the headphone plug will return the
Nait XS 2 to AV Bypass mode.
Note:
The mute function is disabled when AV Bypass mode
is engaged.
9.7 Other Signal Inputs and Outputs
The Nait XS 2 incorporates RCA phono
sub out
, DIN
pre-
amp out
, and DIN
power-amp in
sockets on its rear panel.
In normal use the
pre-amp out
and
power-amp in
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 be used with the
Nait XS 2 power amplifier.
• An alternative power amplifier is to be used with the Nait
XS 2 preamplifier.
Note:
When an external preamplifier is connected to
the Nait XS 2 power-amp in socket, a fault will initially be
indicated by the Nait XS 2 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.
Note:
The power amp in socket carries a 24V DC power
supply output intended for Naim preamplifiers that require
an external power supply.
The RCA phono
sub out
sockets provide a stereo output
intended for connection to an active subwoofer. The
output signal is a duplicate of the preamplifier output. No
low-pass filtering is applied.
Diagrams 11.1 and 11.2 illustrate some applications of the
Nait XS 2 preamp out and power amp in sockets.
9.8 Power Supply Upgrades
The Nait XS 2 preamplifier 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 11. The Nait XS 2 and external power
supply must be switched off when connections are made.
Switch on the external power supply first followed by the
Nait XS 2 when all connections are complete.
9.9 General Connections Notes
The Nait XS 2 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 2 rear
panel. This is intended to be used to connect a turntable
pick-up arm signal earth only.
9.10 External Control and Interface
The Nait XS 2 is fitted on its rear panel with a 3.5mm jack
Remote In
socket and a
mini-USB
interface socket.
The Remote In socket can be used for RC5 remote control
of the Nait XS 2 via a wired connection or a remote IR
repeater.
The mini-USB socket enables firmware upgrades and
diagnostic tests to be carried out. Contact your Naim
retailer for more information if required.
Note:
The mini-USB interface is not intended for the
connection of USB memory devices.
