CEILING SERIES
Manual del usuario /
User's manual
7
The exploded view below identifies the different elements to
ease handling and installation:
Fig. 1 –CL-5, front view
Fig. 2 –CL-5, back view
2. INSTALLATION
2.1 Preliminary considerations. Types of installation
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.
A
parallel
configuration allows the use of two speakers per
channel for a 4 ohm load:
Fig. 3 – 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:
Fig. 4 - 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 illustration).
Fig. 4.1 – 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 (6W) line transformer model
CL-5T should be used.
Fig. 5 – Parallel connection of transformer units
WARNING:
BEFORE INSTALLING THE SPEAKERS, MAKE
SURE THERE IS A MINIMUM CEILING VOID HEIGHT OF 100
MM (4”).
