Brochure

AD-C81T w
AcousticDesign™ 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.
Features
• 8" 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
Specifications
Configuration Ceiling subwoofer, ported
Low-frequency Transducer 8" (20 cm) weather resistant, polypropylene cone woofer,
rubber surround
Frequency Range
1
39
Frequency Response (-6 dB) 39 Hz – 184 Hz
Useable Frequency Range (-10 dB) 28 Hz – 208 Hz
Filter 120 Hz low-pass, passive, bypassable
Maximum Output
2
39
Calculated Peak Output 118 dB SPL
Calculated Continuous Output 112 dB SPL
Nominal Impedance 8Ω
Power Rating 39
RMS Power Handling
3
100 W (100 hours IEC)
Recommended Max Amp Power 200 W RMS
Sensitivity 92 dB, 2.83 V, 1 m, free space (4π)
Transformers 39
Type Custom low distortion laminated core, wide bandwidth design
Taps 70 V: 60, 30, 15, 7.5 W / 100 V: 60, 30, 15 W / 8Ω selected by switch
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 39
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 / Shipping 20 lb (9.1 kg) / 28 lb (12.7 kg)
Available Accessories ADC-MRS Mud ring bracket • ADC-NCS New construction bracket
1) All frequency ranges specified refer to measured free field response.
2) Calculated SPL at 1m, (free space, 4π), speaker operating at rated RMS power with pink noise within specified frequency range
3) Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.