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3.6 Speaker Assembly with Plaster 'Mud' Ring
An optional plaster (Mud) ring can be used if a conventional ceiling tile is not being used. The
wings on the plaster ring are attached to the building structure using the holes provided. The
plaster is then applied over the bracket.
4. Polarity Checking
It is most important to check the polarity of the wiring. A simple method of doing this without a
pulsey checker as follows; Connect two wires to the + and - terminals of a small storage
battery that is connected to the + terminal of the battery to the speaker cable leg which you
believe to be the positive speaker terminal, and likewise the - leg of the battery to the negative
speaker terminal.
If you have wired it correctly the LF drive unit will move forward, indicating the wiring is
correct. All that remains now is to connect the + speaker lead the + terminal on the
amplifier and the - lead to the - terminal on the amplifier. If however, the LF driver moves
backwards, the input connections need to be reversed.
If problems are encountered, inspect the cable wiring in the first instance. It should also be
noted that different amplifier manufacturers utilize different pin configurations and polarity
conventions. If you are using amplifiers from more than one manufacturer, check the polarity
at the amplifiers as well as the loudspeakers.
Important: Connect a safety cable to the rear
of the speaker can.
NOTE: the installation of this product must be
carried out in conformity with local building codes
and standards. If necessary consult your local
safety standards officer before installing any
product. Alternatively, check any laws or bylaws.
Tannoy will not be held responsible for any
damages caused by the improper installation of
loudspeaker.
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