AD-C Series
AD-C820/AD-C821/ AD-C1200 User Manual
AD-C820 – 203 mm (8") 2-way coax baffle assembly AD-C800BB – Pre-install enclosure for AD-C820 AD-C821 – 203 mm (8") 2-way coax blind-mount AD-C800 RAIL KIT – Split Ring and Tile Rails for AD-C821 AD-C800RG – Round Grille for 8" loudspeaker AD-C800SG – Square Grille for 8" loudspeaker AD-C1200 – 304 mm (12") 2-way coax baffle assembly AD-C1200BB – Pre-install enclosure for AD-C1200 AD-C1200SG – Square Grille for 12" loudspeaker
TD-000296-00 REV. C
*TD-000296-00*
IMPORTANT SAFETY PRECAUTIONS AND EXPLANATION OF SYMBOLS
WARNING! 
1.Read these instructions.
2.Keep these instructions.
3.Heed all warnings.
4.Follow all instructions.
5.Clean only with a dry cloth.
6.Install in accordance with QSC Audio Product’s instructions and local building codes. The installation should be done by a licensed installation professional.
7.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
8.Only use attachments/accessories from QSC Audio Products, LLC.
9.Use only with mounts or brackets supplied or specified by QSC Audio Products, LLC.
10.Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any way.
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un-insulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this manual.
WARNING! Before placing, installing, rigging, or suspending any speaker product, inspect all hardware, suspension, cabinets, transducers, brackets and associated equipment for damage. Any missing, corroded, deformed or non-load rated component could significantly reduce the strength of the installation, placement, or array. Any such condition severely reduces the safety of the installation and should be immediately corrected. Use only hardware which is rated for the loading conditions of the installation and any possible short-term unexpected overloading. Never exceed the rating of the hardware or equipment. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.
Warranty (USA only; other countries, see your dealer or distributor)
Disclaimer
QSC Audio Products, LLC is not liable for any damage to amplifiers, or any other equipment that is caused by negligence or improper installation and/ or use of this loudspeaker product.
QSC Audio Products 3-Year Limited Warranty
QSC Audio Products, LLC (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized service stations via prepaid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific legal rights. This limited warranty is freely transferable during the term of the warranty period. Customer may have additional rights, which vary from state to state.
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this limited warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized dealer, will void this limited warranty.
Periodically, this warranty is updated. To obtain the most recent version of QSC’s warranty statement, please visit www.qscaudio.com. Contact us at 800-854-4079 or visit our web site at www.qscaudio.com.
© Copyright 2010, QSC Audio Products, LLC
QSC® is a registered trademark of QSC Audio Products, LLC
“QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office All trademarks are the property of their respective owners.
1
Introduction
Congratulations and thank you for your ceiling loudspeaker purchase. The AD-C820, AD-C821 and AD-C1200 models offer excellent acoustic performance in an easy-to-install and attractive package. Please review these instructions carefully and follow the recommendations.
Installation should be done by a licensed installation professional and in accordance with these instructions and local building codes.
The AD-C820 and AD-C821 models feature an 8" coaxial driver with a high-frequency neodymium compression driver and low-frequency ferrite woofer in a ported baffle assembly. The AD-C1200 model features a 12" coaxial driver with a 1.75" compression driver and a 12" low-frequency ferrite woofer in a ported baffle assembly.
All models are equipped with an audio transformer suitable for 70V and 100V distributed loudspeaker systems. The AD-C820 and AD-C821 are equipped with a 6 position tap selector switch which has an Off position and can bypass the transformer for 16 ohm applications. On the
AD-C1200 tap selection is accomplished using terminal block connectors during installation. There is also a connection for bypassing the transformer for 16 ohm operation.
Package Contents
AD-C1200 |
AD-C820 |
Loudspeaker Baffle — 1 component |
AD-C820 Loudspeaker Baffle — 1 component |
User Manual — 1 component |
User Manual — 1 component |
Product Warranty Card — 1 component |
Product Warranty Card — 1 component |
Mounting Screws (size M5) — 6 components |
|
|
AD-C800BB |
AD-C1200BB |
Back Box Assembly — 1 component |
Back Box Assembly — 1 component |
Instruction Sheet — 1 component |
Instruction Sheet — 1 component |
|
AD-C1200SG |
AD-C800RG/SG |
Grille Assembly — 1 component |
Grille Assembly — 1 component |
Instruction Sheet — 1 component |
Instruction Sheet — 1 component |
Spare Grille Cloth — 1 component |
Spare Grille Cloth — 1 component |
M4 x 30mm Screws — 4 components |
Screw-hole Template — 1 component |
|
M4 Plastite® Screws — 4 components |
AD-C821 |
|
Loudspeaker System — 1 component |
AD-C800 RAIL KIT |
User Manual — 1 component |
Split Rings — 1 components |
Product Warranty Card — 1 component |
Suspended-ceiling Tile Rails — 2 components |
Mounting Hole Template — 1 component |
M4 Sheet Metal Screws — 2 components |
2
Features
AD-C821 Loudspeaker System
c |
d |
b |
e |
|
a
– Figure 1 –
f
g
h
– Figure 2 –
a.Pivoting connection cover
b.Euro connectors
c.Pivoting connection cover retaining screw
d.Loudspeaker wiring hole
e.Seismic mounting tab
f.Mounting tabs
g.Grille attachment magnets
h.Tap switch (transformer included)
3
AD-C820 Loudspeaker Baffle
a
b
|
|
c |
|
a. Mounting tabs |
|
|
|
– Figure 3 – |
|||
|
|||
b.Grille attachment magnets
c.Tap Switch (transformer included in AD-C800BB)
AD-C800BB Back Box
Sold separately for use with AD-C820 Loudspeaker Baffle
a
a
d
a 
– Figure 4 –
a. Dual Knockouts (½" and ¾") (Qty: 5) b. Ceramic terminal block
c. Transformer
d. Mounting straps (Qty: 4) e. Ten-pin Mate-N-Lok™
a
b
c
e
a
4
AD-C800 Rail Kit
The AD-C800 RAIL KIT is sold separately for use with the AD-C821 loudspeaker system.
– Figure 5 – |
– Figure 6 – |
Split Ring |
Suspended-ceiling Tile Rail |
AD-C800SG/RG Loudspeaker Grilles
Sold separately for use with the AD-C820 and AD-C821 loudspeaker systems
– Figure 7 – |
– Figure 8 – |
AD-C800RG |
AD-C800SG |
5
AD-C1200 Loudspeaker Baffle
a
c
b
d
– Figure 9 –
a.Dual Euro connectors
b.150 W Transformer for 70/100 V distributed loudspeaker systems
c.Crossover network
d.Installation hook
AD-C1200BB Back Box
Sold separately for use with AD-C1200 Loudspeaker Baffle
b
a
a
a
a
c
a
– Figure 10 –
a.Dual knockouts (½" and ¾") (Qty: 5)
b.Mounting tabs (Qty: 4)
c.Ceramic terminal block
6
AD-C1200SG Loudspeaker Grille
– Figure 11 –
AD-C821 Installation Options
The AD-C821 Loudspeaker System is a blind-mount design made to mount into finished ceilings. The AD-C821 loudspeaker system can be mounted in suspended ceilings, as well as non-suspended ceiling types. We recommend that you consult an installation professional for safety assurance, quality installation, and optimum acoustic performance.
Suspended Ceiling
The Suspended-ceiling Tile Rails (Figure 6) must be used with the Split Ring bracket (Figure 5). The Suspended-ceiling Tile Rails are designed to be used with 24" (600 mm) t-channel suspended-ceiling supports to provide necessary strength for mounting.
Non-suspended Ceilings
For other ceiling types, the Split Ring bracket is used to reinforce the mounting surface.
Safety Features
The AD-C821 provides two safety features: a Seismic Mounting Tab and a Grille-retaining Safety Tether.
•The Seismic Mounting Tab is the metal tab, on top of the enclosure, suitable for securing the loudspeaker system to building framing. This provides maximum safety in the event the ceiling structure fails for any reason.
•The Grille-retaining Safety Tether is comprised of two plastic lines, one coming from the grille, the other from the loudspeaker assembly, that hook together to prevent the grille from falling.
7
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