QSC Audio AD-C81Tw Grill Safety Clip, Use the Secondary Support Tab, Mounting Clamps, Connections

Grill Safety Clip

The cabinet and the grill both have a small loop of plastic line. The grill’s loop has a clip attached. Using the grill clip, attach the grill to the cabinet’s loop. This will help prevent the grill from falling should it become detached.

Use the Secondary Support Tab!

Loudspeakers can potentially generate substantial vibra- tion. In addition to ensuring all hardware is properly installed and secured, you must use the secondary support tab on the enclosure to secure the loudspeaker to an appro- priate structural support. This will minimize the chance of the loudspeaker falling from the ceiling in the event the pri- mary mount fails. Any cable or wire used as a secondary support line must be strong enough to support several times the weight of the loudspeaker. Do not use rope, string, twine or other textile-based line in the secondary support system as it is easily cut or burned. The secondary support attachment point and any fasteners used on the building’s structure must also be strong enough to support several times the weight of the loudspeaker.

Mounting Clamps

The mounting clamps are part of the assembly for simple use. Do not install the grill until clamps have been tightened and any adjustments made.

Before inserting the cabi- net into the mounting cut- out, make sure the clamps are folded in against the cabinet, see 1, right.

After the cabinet is installed into the mount- ing cutout, tighten each clamp’s screw using a #2 Phillips screwdriver, see 2, right.

The clamp rotates 90° and is then pulled tight by the screw, see 3, right.

Connections

Connect signal wires either directly to ceramic terminal block noting correct polarity or to the supplied plastic terminal block assembly. When using the plastic terminal assembly, connect the four pin receptacle to the ceramic block observing polarity. Connect the signal wires to the screw terminals of one of the two pin plugs observing correct polarity. The other two pin plug can then be used as pass through to daisy chain the signal to another speaker or it can be left unused.

Other Recommendations and Important Information

•Grill removal: The grill can be removed by carefully prying around its outer edge or inserting a small, metal pin or hook into the grill’s openings and pulling evenly around its perimeter.

•If rattles or buzzing is heard during operation, it may be necessary to put vibration dampening material between the support rails and the ceiling tiles and/or t-channels.

•The support rails have holes along their usable length to attach the C-ring bracket. This allows for the cutout to be placed in many positions along the ceiling tile width.