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8-inch low-frequency woofer

1.4-inch diaphragm compression driver

200 watt continuous power rating

70V/100V multi-tap transformer included (system can operate in distributed or low-impedance mode)

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

AD-C821 is sold in the following system packages:

AD-C821R SYSTEMAD-C821 blind-mount loudspeaker system

Split ring and tile rails

AD-C800RG Round grille (white, paintable)



    Configuration Passive
    Low-frequency Transducer 8-inch (203 mm) ferrite woofer
    Hight-frequency Transducer 1.4-inch (36 mm) neodymium compression driver
    Frequency Range 1
    Frequency Response (-6 dB)
    Useable Frequency Range (-10 dB)

    61 Hz to 18 kHz
    52 Hz to 18 kHz
    Maximum Output 2
    Calculated Peak Output
    Calculated Continuous Output

    120 dB SPL
    114 dB SPL
    Nominal Coverage 90° conical DMT
    Nominal Impedance 16 ohms
    Power Rating
    Continuous power handling3 
    Recommended amplifier power 
    (loudspeaker "program" 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 Volume 18 liter (0.64 ft³)
    Connectors Two 2-pin Euro-style connectors
    Mounting Hardware Captive, integral Mounting Clamps. Insert enclosure into mounting
    hole, and tighten. Suspended ceiling Split-ring and 
    Suspended Ceiling Tile Rails - sold separately.
    Weight - Net 16 lb (7.3 kg)
    Dimensions Diameter: 13.4-inch (340 mm)
    Depth: 11.9-inch (302 mm)
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