QSC AD-C81Tw-WH 8-Inch Ceiling Mount Subwoofer

The AcousticDesign Series of installation loudspeaker products from QSC expands with the new AD-C81Tw ceiling mount subwoofer system. Designed to supplement audio systems with low-frequency extension, the new AD-C81Tw is acoustically matched to the entire AD Series. Rated for 100 watts continuous power handling and able to take up to 400 watt peaks, the AD-C81Tw is a great compliment to any of the ceiling mount or surface mount AD Series models. The 8" woofer is equipped with a polypropylene cone for protection in humid environments. The driver features a synthetic rubber surround and works optimally with the large port to provide excellent low frequency extension below 40 Hz without undesirable port turbulence. This highly efficient design measures 92 dB SPL sensitivity. The AD-C81Tw has a built in passive low-pass filter set at 120 Hz. The filter is defeatable from the front baffle to allow the use of outboard crossovers.

The baffle and mounting tabs are molded from high-impact polystyrene. The rear enclosure is heavy gauge, powder coated steel. The attractive aluminum grille is backed with an acoustically transparent white cloth. The input cup is mounted on the side of the enclosure to reduce the amount of vertical clearance necessary to install the speaker. The input cup cover features a conduit attachment point plus an additional knockout for daisy-chain wiring. Input signal connection is made with a high temperature resistant ceramic screw terminal for compliance with European safety standards. The AD-C81Tw is factory shipped with C-rings and tile rails for installation. New construction rings (ADC-NCS) and mud rings (ADC-MRS) are also available separately. The AD-C81Tw is equipped with a 70/100 V transformer with multiple taps and an 8 ohm bypass.

QSC AD-C81Tw-WH Features

• 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

• AD-C81Tw-WH 8-Inch Ceiling Mount Subwoofer1
• C-ring and tile rails1
• Round grille (white, paintable)1
• Paint mask1
• Connector assembly1

• ConfigurationCeiling subwoofer, ported
• Low-frequency Transducer8-inch (20 cm) weather resistant, polypropylene cone woofer, rubber surround
• Frequency Range [1]
  • Frequency Response (-6 dB): 39 Hz to 184 Hz
  • Useable Frequency Range (-10 dB): 28 Hz to 208 Hz
• Filter120 Hz low pass, passive, bypassable
• Maximum Output [2]
  • Calculated Peak Output: 118 dB SPL
  • Calculated Continuous Output: 112 dB SPL
• Nominal Impedance8 ohms switchable
• Power Rating
  • Continuous power handling[3]: 100W (100 hours IEC)
  • Recommended amplifier power (loudspeakerprogram" power): 200W
• Sensitivity92 dB, 2.83 V, 1 m, free space (4 pi)
• TRANSFORMERS
  • Type: Custom low distortion laminated core, wide bandwidth design
  • Taps (switch selected)
    • 70V: 60, 30, 15, 7.5W; 8Ω
    • 100V: 60, 30, 15W; 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
• ENCLOSURE
  • 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
    • Net: 20 lbs (9.1 kg)
    • Shipping: 28 lbs (12.7 kg)
    • Available Accessories: ADC-MRS Mud ring bracket • ADC-NCS New construction bracket
• Notes
  • [1] All frequency ranges specified refer to measured free field response
  • [2] Calculated SPL at 1 m, (free space, 4 pi), speaker operating at rated continuous power with pink noise within specified frequency range
  • [3] Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz to 20 kHz band limiting, 6 dB signal crest factor