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 mount- ing 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 applica- tion, 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 enclo- sure 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 connec- tions 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 posi- tions may be used. Do not use highest tap setting with 100V systems. 8 ohm sys- tems, 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” posi- tion, 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 sig- nal 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 cabi- net’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 adjust- ments are complete before installing the grills.

Page 4 Page 6
Page 5
Image 5
QSC Audio AD-C81Tw user manual Installation Procedure
Page 4 Page 6

AD-C81Tw specifications

The QSC Audio AD-C81Tw is a versatile and high-performance ceiling loudspeaker designed to meet the demands of a variety of commercial audio applications, such as retail spaces, corporate environments, and hospitality venues. With its sleek design and advanced technology, the AD-C81Tw delivers exceptional sound quality while blending seamlessly into any architectural setting.

One of the standout features of the AD-C81Tw is its 8-inch, low-frequency driver, which ensures impactful bass response and a well-balanced sound profile. The speaker also incorporates a high-frequency tweeter that delivers crisp, articulate highs, making it ideal for speech reinforcement as well as music playback. The coaxial design of the driver and tweeter allows for a streamlined installation process and optimum sound dispersion, providing even coverage across the listening area.

The AD-C81Tw is equipped with QSC's patented acoustic technology that enhances performance and reliability. The inclusion of a 70/100V transformer allows for flexibility in installation and makes it easier to reach long distances without losing audio quality. This feature is particularly useful in large venues where sound needs to be distributed uniformly.

Another key characteristic of the AD-C81Tw is its quick-install design. The speaker is engineered with a simple mounting system that minimizes installation time and complexity, making it a favorite among contractors and system integrators. The back can is built to fit standard ceiling cutouts, and its integrated mounting hardware ensures a secure fit in various ceiling types.

The QSC AD-C81Tw is also designed with durability in mind. Its robust construction, combined with weather-resistant materials, makes it suitable for both indoor and outdoor applications. This ensures longevity and consistent performance in different environmental conditions.

In addition to its acoustic performance, the AD-C81Tw features a modern, low-profile appearance that complements any decor. The grille can be painted to match the surrounding ceiling, allowing for unobtrusive integration into various spaces.

Overall, the QSC Audio AD-C81Tw stands out as a reliable choice for those seeking a high-quality ceiling speaker that combines great sound with user-friendly features and stylish design, making it a perfect fit for a wide range of audio installations.
Top Page Image Contents