3. Speaker Positions
S4-LCR Series modules are designed specifically for front
and centre channel applications in multi-channel audio visual
installations. Position guidelines and diagrams are covered in the
following paragraphs and illustrated in Diagram 4.
The left and right speakers should be located either side of the
screen. The centre channel speaker should be located centrally
above or below the screen, ideally less than 0.25 m (10 in) away.
In the case of acoustically transparent screens the centre channel
speaker should be located centrally behind the screen.
Note:
The nature of the installation of custom install speakers
means that it is sometimes impractical to locate them in acoustically
optimal positions. Compromise is often more likely to be necessary
in multi-channel installations where positions have to be found for
multiple speakers. In these circumstances it is preferable to favour
the position of the front and centre channel speakers over that of
the surround channel speakers.
Diagram 4
Left
Right
Centre
<0.25 m
(<10 in)
4. Connections and Mode Settings
S4-LCR Series systems can be connected in either passive
or active mode. Diagrams 5 to 8 illustrate passive and active
connection of systems comprising both one and two S4-LCR65W
modules.
4.1 Passive Mode
• In passive mode, the S4-LCRMT and S4-LCR65W modules
employed for each channel are connected in parallel to a single
power amplifier channel.
• The mode selection switch on the rear of the S4-LCRMT module
should be switched to “1W” if one S4-LCR65W is used (per S4-
LCRMT) and switched to “2W” if two are used.
Ensure that the
mode selection switch position is correct before use.
Diagram 5
S4-LCRMT and single S4-LCR65W connection in passive mode.
–
–
+
+
Switch in 1W position
Jumpers in J1 position
Crossover assembly screws
Connect to amplifier
IMPORTANT Ensure that the mode selection
switch position is correct. Damage may result if
the switch position is incorrect.
• The two mode selection jumpers on the crossover PCB of
each S4-LCR65W module should be located in the J1 position.
The mode selection jumpers can be accessed by lifting the
crossover assembly from the back of the S4-LCR65W module.
This is achieved by removing the four screws identified in
Diagram 5.
Note:
S4-LCR65W modules are initially supplied with their jumpers
in the J1 position. Jumper position should however always be
confirmed visually before S4-LCR65W modules are installed.
