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INSTALLATION
Preliminary considerations
For complete installation, we need to take the
time to plan ahead the cutting out tile holes and
the cabling of the units.
Conventional amplifiers can be used to power
the DAS ceiling speakers. With them, two types of
wiring configurations are possible.
Types of installation
A parallel configuration allows the use of two
speakers per channel for a 4 ohm load:
Amplifier
Fig. 5 – parallel connection
Series-parallel connection. Two loads are wired
per channel, each load consisting of four units
connected in series-parallel. A total of 8 speakers
per channel can be installed this way:
Amplifier
Fig. 6 - series-parallel connection
Similarly, if one does not wish to use a
transformer model, the number of units in series-
parallel can be increased, as long as 4 or more
ohms impedance is achieved, as follows.
Each amplifier will drive two loads in parallel.
Each will consist of the parallel connection of as
many loads as we want to connect in series. Each
of the latter loads consists of the units to be series
connected (see Fig.7).
Manual del Usuario / Ceiling series / User's Manual
Amplifier
Fig. 7 – Series-parallel connection of a large
number of speakers per channel
When working with a large number of units
wired this way, one should ensure that all speakers
get enough power.
Otherwise the user will tend to overload the
amplifier, which in turn may result in speaker
failure.
Example: for the system on the illustration,
assuming CL-6 (40W):
Each channel drives 18 units, for a total of
8x40=720W worth of speaker power handling.
Since amplifier channel should be 100-150% of
the speakers' power handling, 720 to 1000 W
should be used for amplifier power (at 4 ohm).
For very large installations, the line transformer
models should be used.
Amplifier
Fig. 8 – Parallel connection of transformer units
WA R N I N G:
B E F O R E
SPEAKERS, MAKE SURE THERE IS A MINIMUM
CEILING VOID HEIGHT OF 100 mm (4").
Installation
The different installation steps are described.
Before this can take place, the installation should
be wired, leaving all of the ceiling wiring in place
and ready for connection.
Step 1 – Remove the speaker grille: The grille
must be removed for access to the mounting
screws. Insert a pointy object and introduce it in a
grille hole close to the edge. You'll remove the
grille with ease if using two pointy objects on
opposite ends.
I N S TA L L I N G
T H E
5
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