21
GREEN WIRE
ALWAYS ON
THIS SIDE OF
PLUG
SPEAKER
BUS
GRA
Y
BROWN
WHITE
GREEN
Figure 24.
6. Dual header connections are provided on all modules so you can easily extend a bus cable that is too short,
or you can branch off the main run to a remote or side group of modules, if necessary.
Note: Since bus connectors can be both in and out, one header connection may be left open. The
remaining connector may be used to create a branch from the bus.
B. Install Speaker Bus.
The procedure for running the Speaker Bus is very similar to the installation of the System Bus. The speaker
bus will be used to send high-level signals from amp outputs to speaker modules in the system. (For very
small systems with no amps, the head unit group is connected directly to speaker
groups via speaker bus.)
• Connect related modules with a continuous run of bus cable.
• Start from the module at one end of the group and work toward the
other end.
• Run separate buses for front, rear and sub (or tweeter, mid, and sub).
1. Using the a green/white/brown/gray bus cable assembly, plug a connector of
the bus into a SPEAKER BUS header on each 942 module in the Front Ampli-
fier group. The connectors are polarized, so they will only connect in one
direction, but always make sure to prevent the possibility of plugging the system bus to
the header backwards (see Figure 24).
2. Using the same bus cable or branching off with a new section of bus cable, continue
connecting all 932 modules in the Front Speaker group to the Front Speaker Bus.
3. Connect all remaining Amplifier/Speaker Product Groups in the same way.
4. Extend system or speaker buses, if necessary, using the available extension cable assemblies.
C. Low-Level Buses.
The rules are similar to those for installation of the other signal buses:
• Connect modules within a group and to corresponding groups.
• Start from the module at one end of the product group and work toward the module at the other
end.
• Low-level cables are quite different from other bus cables. Use only high-quality shielded RCA
patch cords, preferably gold-plated, for low-level bus connections. Use Audio Authority
®
Excellerator Cable and Solderless Gold RCA Connectors for made-to-measure cables of exact
length, especially for those runs over 6 feet.
942
942
932
932
932
932
942
942
932
932
932
932
Figure 25. Speaker Bus Example.
Front Speaker Bus
Rear Speaker Bus
Left Rear Speaker Group
Left Front Speaker Group
Right Rear Speaker Group
Right Front Speaker Group
Rear Amplifier Group
Front Amplifier Group
Summary of Contents for Car Audio System
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