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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 

Loudspeaker Baffle — 1 component
User Manual — 1 component
Product Warranty Card — 1 component
Mounting Screws (size M5) — 6 components

AD-C1200BB 

Back Box Assembly  — 1 component
Instruction Sheet — 1 component 

AD-C1200SG

Grille Assembly — 1 component 
Instruction Sheet — 1 component 
Spare Grille Cloth — 1 component 
M4 x 30mm Screws — 4 components 

AD-C821 

Loudspeaker System — 1 component  
User Manual — 1 component  
Product Warranty Card — 1 component  
Mounting Hole Template — 1 component

AD-C820 

AD-C820 Loudspeaker Baffle — 1 component 
User Manual — 1 component  
Product Warranty Card — 1 component

AD-C800BB

 

Back Box Assembly — 1 component 
Instruction Sheet — 1 component 

AD-C800RG/SG

 

Grille Assembly — 1 component  
Instruction Sheet — 1 component  
Spare Grille Cloth — 1 component  
Screw-hole Template — 1 component  
M4 Plastite

®

 Screws — 4 components 

AD-C800 RAIL KIT

Split Rings — 1 components 
Suspended-ceiling Tile Rails — 2 components 
M4 Sheet Metal Screws — 2 components 

Summary of Contents for AD-C series

Page 1: ...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 a...

Page 2: ...ng 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 equipmen...

Page 3: ...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 o...

Page 4: ...ting 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 transforme...

Page 5: ...luded in AD C800BB AD C820 Loudspeaker Baffle a Dual Knockouts and Qty 5 b Ceramic terminal block c Transformer d Mounting straps Qty 4 e Ten pin Mate N Lok e d c b a c a b AD C800BB Back Box a a a a...

Page 6: ...th the AD C821 loudspeaker system AD C800 Rail Kit Sold separately for use with the AD C820 and AD C821 loudspeaker systems AD C800SG RG Loudspeaker Grilles Split Ring Suspended ceiling Tile Rail AD C...

Page 7: ...peaker systems c Crossover network d Installation hook AD C1200 Loudspeaker Baffle Sold separately for use with AD C1200 Loudspeaker Baffle AD C1200BB Back Box d c b a a Dual knockouts and Qty 5 b Mou...

Page 8: ...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...

Page 9: ...s Installation There are two methods for installing the AD C821 loudspeaker system into the ceiling using the Mounting Clamps with or without the Split Ring or using the Suspended ceiling Tile Rails w...

Page 10: ...s for the mounting hole to be placed in many positions along the ceiling tile width 2 Insert the Split Ring through the mounting hole by slightly bending the ring apart at the split inserting one end...

Page 11: ...gnal wiring through the cover plate hole with Wire Clamp Fitting making sure there is enough wire to strip tin and install the connector Do not secure the Wire Clamp Fitting at this time 6 Strip the e...

Page 12: ...e gauge is 20 AWG the maximum is 8 AWG 3 Install a Wire Clamp Fitting into the selected knockout holes You can substitute the necessary fitting if the facility s loudspeaker signal wiring is in condui...

Page 13: ...ectors to the crossover points J2 J3 and J4 on the larger PCB Note J2 J3 and J4 are labeled for the proper wire color If the wire colors on the harness are different than the labels one connector is s...

Page 14: ...into the ceiling through the mounting hole or into the AD C800BB back box 3 Tighten each clamp using a 2 Phillips screwdriver 7 in lbs Figure 19 item a Important Excessive torque may cause mounting t...

Page 15: ...her Rotating the grille beyond the constraints of the tether with excessive force can break the tether 6 Optional A drill template and four M4 Plastite screws are provided with the grille assembly for...

Page 16: ...t 78 lbs of the AD C1200BB Figure 10 and the AD C1200 loudspeaker baffle assembly Figure 9 4 Route the facility s loudspeaker signal wires through the knockout hole s and to the ceramic terminal block...

Page 17: ...rt the tinned wires Note Do not remove the two pin Euro style connector J1 plug with pre attached wires 3 Locate the wires coming from the ceramic terminal block in the AD C1200BB back box and strip t...

Page 18: ...e installation hook along the insertion edge of the loudspeaker baffle assembly by hooking it to one edge of the back box and using it to support that edge while completing the assembly Warning Do not...

Page 19: ...rewdriver install the grille with the M4 screws provided Note The use of LOCTITE is recommended to prevent grille screws from loosening during use Note The extra mounting holes shown as item c Figure...

Page 20: ...hten the screws Negative wire goes to the COM connection which is marked with a black dot 5 When you install the loudspeaker baffle assembly into the back box plug this connector into the two pin head...

Page 21: ...e actual dimension of the hardware For cutting the mounting hole refer to the Cut Mounting Hole in Ceiling section in this document 11 8 299 mm 8 0 202 3 mm 10 9 275 7 mm 11 2 283 7 mm 0 3 0 8 mm 11 5...

Page 22: ...21 Dimensions Continued 23 0 584 mm 14 6 371 mm 15 0 381 mm 15 5 394 mm 17 9 555 mm 20 4 518 mm AD C1200BB Ceiling Cutout Dim 376 mm x 376 mm 14 6 371 mm...

Page 23: ...V N A 150 W 75 W 37 5 W 70V 150 W 75 W 37 5 W 18 75 W Agency Listings CE UL 1480 commercial professional use outdoor damp UL 2043 air handling spaces Enclosure Volume 0 6 cu ft 18 L N A 3 1 cu ft 88 L...

Page 24: ...World Wide Web www qscaudio com E mail info qscaudio com service qscaudio com 2010 QSC Audio Products LLC All rights reserved QSC and the QSC logo are registered trademarks of QSC Audio Products LLC...

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