6
TD-000264-00-E
Installation Procedure
1. Using the included C-ring or the dimensions provided, trace a cutout pattern onto the ceiling
surface.
2. Cut the mounting hole. Use a sharp tool to avoid stressing or cracking the mounting surface.
3. Pull the wires through the hole.
4. Pass the two suspended ceiling support brackets through the hole and place as shown in
the illustration. Make sure the part of the bracket that is flat against the tile is toward the
hole. If installing in a non-suspended ceiling application, these brackets are not required.
5. Pass the C-ring bracket through the hole. Slide the cutout slot into the hole first, and then
rotate the bracket so it passes through the hole. Be sure the wires pass through the ring.
6. Position the support brackets, and secure the C-ring bracket to each of the support brackets
using the screws provided. If installing in a non-suspended ceiling application, skip this step.
7. Loosen the connection cover plate retaining screw and swing the cover open. Install an
fitting into the hole provided on the cover plate.
8. Temporarily support the enclosure so the wires may be passed through the enclosure top
with enough slack to prepare and terminate the wires.
9. Locate the terminal block connectors included with the loudspeaker. Loosen the wire
retaining screws fully.
10. Strip the wire ends approximately 10 mm (0.4”) and insert each wire into its proper
connector position. Tighten the wire retaining screws fully.
11. Rotate the connection cover plate closed, making sure not to stress the connections or
pinch the wires. Tighten the cover plate’s retaining screw.
12. Adjust the wiring at the entry point, if necessary, and properly secure fitting. This prevents
wire stress and strain from pulling the connections/connectors loose.
13. Attach a safety cable (secondary support cable) from the enclosure’s attachment tab to an
appropriate support point. This cable and the attachment points must be strong enough to
support many times the weight of the loudspeaker in the event the primary mounting system
fails.
14. Insert the enclosure into the ceiling cutout, making sure any brackets used remain properly
positioned. Tighten the loudspeaker’s mounting clamp screws.
15. Set the tap selector switch to the desired position. 70V systems, all four positions may be
used. Do not use highest tap setting with 100V systems. 8 ohm systems, se selector to 8
ohm position.
16. If desired set the 120 Hz low pass filter to the “In” position. This will allow only frequencies
below 120 Hz to reach the loudspeaker. If the switch is in the”‘out” position, all frequencies
in the input signal will reach the loudspeaker. If the AD-C81Tw is being used with the low-
pass filter set to “out” it is recommended that the input signal be filtered before it enters the
loudspeaker.
17. Make sure all tests and adjustments are complete before installing the grills. Locate the
loudspeaker’s grill. The cabinet and the grill both have a small loop of plastic line. Using the
clip on the grill’s line, attach the grill’s safety loop to the cabinet’s loop. Carefully work the
grill into its retaining slot and press firmly into place. Work the grill in slowly and evenly to
avoid damage. Make sure all tests and adjustments are complete before installing the grills.
— Figure 6 —
