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
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.
Specifications |
AD-C820 |
AD-C821 |
Configuration |
Passive |
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Transducers |
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Low-frequency |
8" (203 mm) ferrite woofer |
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High-frequency |
1.4" (36 mm) neodymium compression driver |
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Frequency Range1 |
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Frequency Response (-6 dB) |
61 Hz – 18 kHz |
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Useable Frequency Range (-10 dB) |
52 Hz – 18 kHz |
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Maximum Output 2 |
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Calculated Peak Output |
120 dB SPL |
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Calculated Continuous Output |
114 dB SPL |
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Nominal Coverage |
90° horizontal and vertical |
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Nominal Impedance |
16Ω |
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Power Rating |
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RMS Power Handling3 |
200 W |
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Recommended Max Amp Power |
400 W |
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Sensitivity |
91 dB SPL, 1W/1m |
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Bass Loading |
Ported |
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Transformers |
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Type |
Custom low distortion laminated core, wide bandwidth design |
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Taps |
100 V: 16Ω bypass, 100 W, 50 W, 25 W |
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70 V: 16Ω bypass, 100 W, 50 W, 25 W, 12.5 W |
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Agency Rating |
CE, UL 1480 (commercial/professional use) UL 2043 (air handling spaces) |
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Enclosure Volume |
AD-C800BB: 18 L (0.64 ft 3) |
18 L (0.64 ft 3) |
Enclosure |
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Connectors |
Back box (AD-C800BB): ceramic block |
Two 2-pin Euro-style connectors |
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connector inputs and “through” connectors |
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(rated for 400 W max). Loudspeaker Baffle |
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(AD-C820): 10-pin MATE-N-LOK™ connector |
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and faston connectors. |
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Mounting Hardware |
Pre-installed, suspended, back box, four verti- |
Captive, integral Mounting Clamps. |
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cal mounting straps. |
Insert enclosure into mounting hole, |
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Loudspeaker Baffle: captive, integral |
and tighten. Suspended ceiling Split-ring |
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Mounting Clamps. |
and Suspended Ceiling Tile Rails - sold |
|
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separately. |
Weight - Net |
AD-C820: 8 lb (3.6 kg) |
16 lb (7.3 kg) |
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AD-C800BB: 9.5 lb (4.3 kg) |
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System Weight: 17.5 lb (7.9 kg) |
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Dimensions |
Diameter: 14.9" (379 mm) |
Diameter: 13.4" (340 mm) |
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Enclosure only Depth: 8.3" (211 mm) |
Depth: 11.9" (302 mm) |
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Enclosure with mounting straps |
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Depth: 11.2" (284 mm) |
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System Packages |
AD-C820R SYSTEM: includes |
AD-C821R SYSTEM: includes |
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AD-C820 speaker baffle, AD-C800BB back- |
AD-C821 loudspeaker system, |
|
box, AD-C800RG round grille |
AD-C800RG round grille, and set of tile |
|
AD-C820S SYSTEM: includes |
rails and c-ring |
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AD-C820 speaker baffle, AD-C800BB back- |
AD-C821S SYSTEM: includes |
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box, AD-C800SG square grille |
AD-C821 loudspeaker system, |
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AD-C800SG square grille, and set of tile |
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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.
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