AD-C81Tw

8-inch subwoofer

  • Hero front and angled view of the AD-C81Tw in-ceiling speaker with and without a speaker grill
  • Hero front and angled view of the AD-C81Tw in-ceiling speaker with and without a speaker grill
Certified for Microsoft Teams badge

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

Package Includes:

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

TRANSFORMERS
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

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 20 lb (9.1 kg) Net
28 lb (12.7 kg) Shipping
Available Accessories ADC-MRS Mud ring bracket • ADC-NCS New construction bracket

1All frequency ranges specified refer to measured free field response
2Calculated SPL at 1 m, (free space, 4 pi), speaker operating at rated continuous power with pink noise within specified frequency range
3Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz to 20 kHz band limiting, 6 dB signal crest factor

Specifications are subject to change without notice.

QSC and the QSC logo are registered trademarks of QSC Audio Products LLC in the U.S. Patent and Trademark office and other countries.
AcousticDesign is a trademark of QSC Audio Products, LLC. All other trademarks are the property of their respective owners.