Typical System Configuration:
Fig 1 depicts a typical configuration, where the
AX4752
is providing audio into four listening zones.
Each zone consists of a room with a pair of speakers, and a suitable controller. Additionally a zone
may require TV’s or screens. In Fig 1 three such screens are shown in the Lounge, Gym, and Bedroom.
Each zone may be listening / watching any of the 6 connected sources: Satellite Receiver, DVD,
Video, Digital Music Server, CD Changer, or Tuner.
Controllers:
Each zone has specific control requirements.
Zone 1 - The Lounge -
The ideal control in the lounge environment is from the sofa or lounge suite.
The
IRFX
is a Plasma proof IR receiver, and is most suitable for IR reception from a learning
remote control.
Zone 2 - The Study -
This is a listening environment where remote controls are not welcome on the
busy
desk. The best solution is a wall-mounted keypad. An Axium keypad displays amplifier power
& source selection status. The keypad learns the source equipment IR commands, and relays
these to the equipment via the
AX4752
.
Zone 3 - The Gym -
A
KRXm
& the numeric
KRXs
keypad are used to provide additional access to the
CD
changer, and SAT receiver. In addition the Keypads IR receiver is enabled so that changes can
be made using a remote while working out.
Zone 4 - The Bedroom -
The
KRXm
keypad is situated by the bedrooms adjoining ensuite and
provides
control in that environment. The bedroom control is via the keypad’s IR receiver and a
learning remote control.
Source control IR emitters are plugged into the IR out ports.
There are two IR ports which combine both the controller inputs (IR1 + IR2) These outputs control
sources required in all zones i.e. DVD, VCR, CD & DMS. Each controller interface has an associated IR
Out port that routes IR only to that output. In Fig1 the SAT emitter is plugged into IR out port IR1,
which means the zone 1, 3 & 4 controllers may control the SAT source. The Tuner emitter is plugged
into IR Out port IR2, so only the zone 2 controller may control the Tuner.
Source Components:
The
AX4752
has RCA audio inputs for connecting seven stereo source components & one mono source.
The Fig 1 configuration has only six of the possible eight sources populated.
Each zone may select from any of the connected sources. Someone in the lounge may be listening and
viewing the DVD source, while another in the study may be listening to music from the Digital Music
server.
All four zones may even select the same source, in such circumstances there is a possibility that all
four zones may be trying to control that source - this is not always desirable - so a system should be
well planned and where appropriate additional source equipment installed.
Speakers:
Speakers in each zone are connected to the
AX4752
by ‘Home-Run’ speaker cables.
Each zone has a maximum loading of 4 ohms.
Fig 1 depicts a powered subwoofer in the study. The subwoofer is driven by the zone 2 preamplifier,
and is set to track the zone 2 amplifier volume. The subwoofer volume or offset can be adjusted for
correct tonal balance.
Fig 1 additionally depicts a pair of speakers in the bedroom. These are the associated bedroom
ensuite speakers and are driven by a low powered slave amplifier. The zone 4 preamplifier has been
set to ‘Independent’ mode and connects to the low powered slave amplifier.
Independent mode is where the preamplifier volume may be different from the amplifier volume
(within a range of 55dB), it also has independent Standby and Muting.
Suitable cable for Line level audio is RG59.
Video Outputs:
The composite video outputs are suitable for driving ONE composite video display device. To avoid
signal degradation, home runs of Quad screen RG6 should be less than 100meters.
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