AD-C820 / C821 - Batts Audio, Video and Lighting
 

AD-C820 / C821

QSC Audio, Inc.

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 split 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.

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

AD-C820 and AD-C821 are sold in the following system packages:


    AD-C820R SYSTEM 
  • 1 qty. AD-C820 speaker baffle
  • 1 qty. AD-C800BB Backcan assembly
  • 1 qty. AD-C800RG Round grille (white, paintable)

    AD-C820S SYSTEM 
  • 1 qty. AD-C820 speaker baffle
  • 1 qty. AD-C800BB Backcan assembly
  • 1 qty. AD-C800SG Square grille (white, paintable)

    AD-C821R SYSTEM
  • 1 qty. AD-C821 blind-mount loudspeaker system 
  • 1 qty. Split ring and tile rails
  • 1 qty. AD-C800RG Round grille (white, paintable)

    AD-C821S SYSTEM
  • 1 qty. AD-C821 blind-mount loudspeaker system 
  • 1 qty. Split ring and tile rails
  • 1 qty. AD-C800SG Square grille (white, paintable)

    AD-C820/821 Additional mounting accessories:
  • ADC-MRS Existing construction bracket for drywall or other solid materials
  • ADC-NCS New construction bracket for drywall or other solid materials
SPECIFICATIONS
AD-C820 AD-C821
Configuration Passive
Low-frequency Transducer 8" (203 mm) ferrite woofer
Hight-frequency Transducer 1.4" (36 mm) neodymium compression driver
Frequency Range 1
  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 16 ohms
Power Rating
  RMS Power Handling3 
  Recommended Max Amp Power

200 W
400 W
Sensitivity 91 dB SPL, 1W/1m
Bass Loading Ported
Transformer Type Custom low distortion laminated core, wide bandwidth design
Transformer Taps 100 V: 16 ohms bypass, 100 W, 50 W, 25 W
70 V: 16 ohms bypass, 100 W, 50 W, 25 W, 12.5 W
Agency Rating CE, UL 1480 (commercial/professional use) UL 2043 (air handling spaces)

ENCLOSURE

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