Page 18
National Communications
INSTALLATION
when fitting speakers direct
Please refer to the Installation Diagram on page 18.
Our BMS units are designed to power directly, up to TEN 100V speakers, each
with a tapping setting of 1W or less. This setting will allow each speaker to
provide clear background level audio.
If higher volume is required on one or more speakers, then you may increase
the tapping to a higher W setting, but you must also reduce the number of
speakers accordingly.
NOTE 1. You should not connect direct to these units speakers with a
total tapping setting of more than 8W.
NOTE 2. You should not connect direct to these units speakers that do
not have a 100V transformer. Doing so may damage the unit.
A 3.5mm Audio Plug is supplied to provide connection of your speaker wire to
the BMS1 unit.
SPEAKER CABLE
BMS produces a maximum output of 10 watts. For this power level, you can
use ‘Light Duty’ figure 8 speaker cable, such as 14/0.14 gauge standard or
better .
100V SPEAKERS
BMS2 is designed to operate with standard 100V PA or Background Music
speakers, which are typically Ceiling Mounted or Wall Mounted.
100V Speakers are designed to connect in Parallel fashion, as indicated on the
Installation Diagrams.
This means that the amplifier connects to one speaker, direct onto the appropriate
tapping of the 100V speaker transformer. The next speaker connects from that
same point, and so on to the last speaker, in a ‘daisy chain’ type fashion.
