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1. AC INLET
Plug one end of the AC line cord into the
AC INLET and the other end into
nearby
wall outlet that provides the
correct AC power line voltage, or into a
convenience outlet on any other AMC
product.
2. 2CH/ BRIDGE SWITCHES.
There are two slide switches on the back
panel labelled "2CH/BRIDGE". These
switches allow the XA to operate in
several modes depending on the number
of loudspeakers to be connected. These
modes of operation are defined as
follows;-
2 CHANNEL MODE.
in the BRIDGE position, the XA becomes
a two channel (stereo) amplifier capable
of driving two 8 ohm loudspeakers at 90
watts per channel. In this mode, the XA
can be used as a high power, audiophile
quality, stereo power amplifier.
CAUTION: In the BRIDGE mode, the
speaker terminals should be directly
wired to the loudspeaker and not to any
accessory
device
amplifier network or
adaptors etc that may share a common
ground with other channels.
4 CHANNEL MODE.
in the 2CH. position, the XA becomes a
four channel amplifier capable of driving
four 4 ohm loudspeakers at greater than
45 watts per channel. In this mode, the
XA can be used for Dolby surround sound
systems , multi-room type and bi-amp
applications.
3. INPUTS.
There are four RCA phono connectors on
the back panel that connect to the inputs
of each of the four power amplifiers.
Connections to these inputs are made
with reference to the MODE SWITCH
settings described above;-
BRIDGE MODE.
Connections for the CH
A can be made via L RCA input connector
of CH A and for the CH B input, use the L
With both switches
like
sub-woofer
headphones
With both switches
RCA input connector of CH B.
NOTE: In this mode, the input phono
a
connectors of R RCA input connectors
are disconnected.
2 CH MODE.
operates as a 4 channel amplifier.
Connections to the inputs of these
amplifiers are made through the RCA
phono connectors of L & R RCA
connectors of CH A & CH B.
4. INPUT LEVEL CONTROLS.
Each channel of the XA has its own,
independent level control. Before turning
on the XA for the first time, make sure
that all level controls are set to their fully
clockwise position. These controls can be
used for various functions. For example,
they can be used to match the levels of
loudspeakers in a multi-room installation,
or to lower the sensitivity of the power
amplifier, so that the volume control on
the pre-amplifier is at a more convenient
and usable position. They can also be
used to optimise the balance in a stereo
system.
NOTE: In the Bridge mode, only the input
level controls of L of CH A & CH B are
operative.
5. RS232 Connector.
XA can be hooked to a control system
through the RS232 connector. The XA
can be hooked up to USB Hub or
Ethernet Switch through RS232 to USB
or RS232 to Ethernet adaptor. Through
the RS232 connector the control system
can turn XA ON or OFF. For details of
commands, please refer to appendix I.
6. SPEAKERS TERMINALS
The XA is equipped with 4-circuit plug-
able
Terminal
connections of the internal amplifiers to
stereo pairs of speakers in the various
zone rooms. They accept wire sizes for
14 to 28 AWG. The following describes
the connections for Bridge and 2 CH
operations;-
4
In this mode, the
Blocks
allow
XA
quick
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