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  • 8-inch polypropylene cone woofer
  • Large port area for extended low-frequency performance
  • Defeatable passive 120 Hz low-pass filter with impedance compensation
  • 100 watts continuous power handling, 400 watts peak
  • 70/100 V multitap transformer with 8 ohm bypass
  • C-ring and tile rails included
  • Side cable entry

Package Includes:

  • AD-C81Tw loudspeaker
  • C-ring and tile rails
  • Round grille (white, paintable)
  • Paint mask
  • Connector assembly



    Configuration Ceiling subwoofer, ported
    Low-frequency Transducer 8-inch (20 cm) weather resistant, polypropylene cone woofer, rubber surround
    Frequency Range 1
    Frequency Response (-6 dB)
    Useable Frequency Range (-10 dB)

    39 Hz to 184 Hz
    28 Hz to 208 Hz
    Filter 120 Hz low pass, passive, bypassable
    Maximum Output 2
    Calculated Peak Output
    Calculated Continuous Output

    118 dB SPL
    112 dB SPL
    Nominal Impedance 8 ohms switchable
    Power Rating
    Continuous power handling3 
    Recommended amplifier power (loudspeakerprogram" power)

    100 W (100 hours IEC)
    200 W
    Sensitivity 92 dB, 2.83 V, 1 m, free space (4 pi)


    Type Custom low distortion laminated core, wide bandwidth design
    Taps (switch selected) 70 V: 60, 30, 15, 7.5 W; 8Ω
    100 V: 60, 30, 15 W; 8Ω
    Environmental Exceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X3 splash rating
    Agency Rating Listed UL1480, UL2043 safe for use in air handling spaces; Transformer is Listed UL1876; Compliant BS/EN 60849 safety standards


    Material Injection molded, high impact polystyrene baffle on a steel enclosure
    Finish White (paintable)
    Grille Painted aluminum
    Connectors Ceramic block or 4-pin Euro terminals in fire protective sub-chamber
    Mounting Hardware Rails and C-ring for ceiling tile installation
    Weight 20 lb (9.1 kg) Net
    28 lb (12.7 kg) Shipping
    Available Accessories ADC-MRS Mud ring bracket • ADC-NCS New construction bracket
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