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    Item #: AD-C821S SYSTEM

    Description

    8" High-power blind mount coaxial ceiling speaker, 70/100V transformer with 16Ω bypass, 90° conical DMT coverage. Includes AD-C800SG square grille in white, C-Ring and Tile Rails. Packaged seperately (total of three cartons).

    Specifications

    The AD-C820 and AD-C821 are acoustically

    identical and designed for music playback,

    public address and distributed audio

    in applications that require high output

    from a ceiling mounted loudspeaker. The

    AcousticDesign™ Series of installation

    loudspeakers has been designed for

    trouble free operation and versatility. Both

    models use custom designed transducers

    and crossover networks, in combination

    with an acoustically optimized enclosure

    (AD-C800BB), or as a fully integrated, sealed

    system (AD-C821). These loudspeakers

    continue the AD Series philosophy of

    bringing natural and accurate sound quality

    combined with versatility and reliability to

    high-ceiling applications.

    The AD-C820 assembly includes the

    coentrant transducers, a 70V/100V

    transformer and a crossover mounted on

    an ABS baffle. When ordered as a system

    (AD-C820R SYSTEM; AD-C820S SYSTEM)

    the backbox (AD-C800BB) and a round or

    square grille are included.

    The AD-821 is a fully integrated, factory

    sealed system using a “dog-ear” style

    mounting scheme. When ordered as a

    system (AD-C821R SYSTEM; AD-C821S

    SYSTEM) a set of tile rails and a c-ring are

    included as is a round or square grille.

    The 8" woofer is equipped with a treated

    paper cone on a steel frame. In the optimized

    enclosure the usable low frequency of

    the system extends to 52 Hz. The 1.4"

    compression driver fires through the center

    of the woofer and is acoustically mated

    to the woofer for a smooth transition at

    crossover. The system achieves 90 degree

    axisymmetric coverage.

    High-current, low tolerance network

    components provide smooth full-range,

    passive performance. The included

    70V/100V, custom designed transformer is

    optimized for low line loss as well as accurate

    and transparent acoustic performance.

    The AD-C820/C821 loudspeakers measure

    91dB sensitivity (1W/1m) and at full

    continuous power are capable of producing

    114 dB SPL (1W/1m) output.

    AD-C820/C821

    AcousticDesign™ High-output Ceiling Mount Loudspeakers

    Features

    • 8" low-frequency woofer

    • 1.4" diaphragm compression driver

    • 200 watt continuous power rating

    • 70V/100V multi-tap transformer included (system can operate in

    distributed or low-impedance mode)

    • AD-C820 transducer/baffle assembly for separated backcan installation

    • AD-C821 designed as a fully integrated blind-mount system

    Specifications AD-C820 AD-C821

    Configuration Passive

    Transducers

    Low-frequency

    High-frequency

    8" (203 mm) ferrite woofer

    1.4" (36 mm) neodymium compression driver

    Frequency Range1

    Frequency Response (-6 dB)

    Useable Frequency Range (-10 dB)

    61 Hz – 18 kHz

    52 Hz – 18 kHz

    Maximum Output 2

    Calculated Peak Output

    Calculated Continuous Output

    120 dB SPL

    114 dB SPL

    Nominal Coverage 90° horizontal and vertical

    Nominal Impedance 16Ω

    Power Rating

    RMS Power Handling3

    Recommended Max Amp Power

    200 W

    400 W

    Sensitivity 91 dB SPL, 1W/1m

    Bass Loading Ported

    Transformers

    Type Custom low distortion laminated core, wide bandwidth design

    Taps 100 V: 16Ω bypass, 100 W, 50 W, 25 W

    70 V: 16Ω bypass, 100 W, 50 W, 25 W, 12.5 W

    Agency Rating CE, UL 1480 (commercial/professional use) UL 2043 (air handling spaces)

    Enclosure Volume AD-C800BB: 18 L (0.64 ft 3) 18 L (0.64 ft 3)

    Enclosure

    Connectors Back box (AD-C800BB): ceramic block

    connector inputs and “through” connectors

    (rated for 400 W max). Loudspeaker Baffle

    (AD-C820): 10-pin MATE-N-LOK™ connector

    and faston connectors.

    Two 2-pin Euro-style connectors

    Mounting Hardware Pre-installed, suspended, back box, four vertical mounting straps.

    Loudspeaker Baffle: captive, integral

    Mounting Clamps.

    Captive, integral Mounting Clamps.

    Insert enclosure into mounting hole,

    and tighten. Suspended ceiling Split-ring

    and Suspended Ceiling Tile Rails - sold

    separately.

    Weight - Net AD-C820: 8 lb (3.6 kg)

    AD-C800BB: 9.5 lb (4.3 kg)

    System Weight: 17.5 lb (7.9 kg)

    16 lb (7.3 kg)

    Dimensions Diameter: 14.9" (379 mm)

    Enclosure only Depth: 8.3" (211 mm)

    Enclosure with mounting straps

    Depth: 11.2" (284 mm)

    Diameter: 13.4" (340 mm)

    Depth: 11.9" (302 mm)

    System Packages AD-C820R SYSTEM: includes

    AD-C820 speaker baffle, AD-C800BB backbox, AD-C800RG round grille

    AD-C820S SYSTEM: includes

    AD-C820 speaker baffle, AD-C800BB backbox, AD-C800SG square grille

    AD-C821R SYSTEM: includes

    AD-C821 loudspeaker system,

    AD-C800RG round grille, and set of tile

    rails and c-ring

    AD-C821S SYSTEM: includes

    AD-C821 loudspeaker system,

    AD-C800SG square grille, and set of tile

    rails and c-ring

    1) All frequency ranges specified refer to measured half-space response (2 pi).

    2) Calculated maximum peak SPL at 1 m, half-space, speaker operating at rated rms power pink noise input, 50 Hz – 20 kHz.

    3) Maximum input power tested in accordance with IEC recommendations; 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.

    AD-C820/C821 Dimensions

    qscaudio.com

    Specifications subject to change without notice.

    1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174

    AD-C820/C821 Spec Sheet - 09/01/10

    Front

    Side

    AD-C820/AD-C821

    AD-C821

    AD-C820

    AD-C800BB

    AD-C800RG

    AD-C800SG

    ©2010 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and

    other countries. AcousticDesign is a trademark of QSC Audio Products, LLC. MATE-N-LOK is a trademark of Tyco. All other trademarks are the property of their respective owners.

    Patents may apply or be pending.

    please recycle

    Side

    Side

    11.9"

    302 mm

    11.6"

    295 mm

    8.2"

    208 mm

    13.38"

    340 mm

    13.4"

    340 mm

    11.5"

    292 mm

    0.3"

    8 mm

    0.3"

    8 mm

    0.36"

    9 mm

    13.4"

    340 mm

    11.5"

    292 mm

    6.6"

    168 mm

    11.9"

    302 mm

    10.9"

    277 mm

    8"

    203 mm

    14.9"

    378 mm

    14"

    356 mm

    11.8"

    299 mm

    Side

    0.5"

    12 mm

    14"

    356 mm

    Side

    0.5"

    12 mm

    14"

    356 mm