QSC AD-C81Tw Spec sheet

AD-C81T w

AcousticDesign™ Ceiling Mount Subwoofer

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

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 highimpact 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.

Specifications

Configuration

Low-frequency Transducer

Ceiling subwoofer, ported

8" (20 cm) weather resistant, polypropylene cone woofer, rubber surround

Frequency Range 1

Frequency Response (-6 dB)

39

39 Hz – 184 Hz

Useable Frequency Range (-10 dB) 28 Hz – 208 Hz

Filter

Maximum Output 2

120 Hz low-pass, passive, bypassable

39

Calculated Peak Output 118 dB SPL

Calculated Continuous Output

Nominal Impedance

Power Rating

RMS Power Handling

Agency Rating

3

112 dB SPL

8Ω

39

100 W (100 hours IEC)

Recommended Max Amp Power 200 W RMS

Sensitivity 92 dB, 2.83 V, 1 m, free space (4π)

Transformers

Type

39

Custom low distortion laminated core, wide bandwidth design

Taps

Environmental

70 V: 60, 30, 15, 7.5 W / 100 V: 60, 30, 15 W / 8Ω selected by switch

Exceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X3 splash rating

Listed UL1480, UL2043 safe for use in air handling spaces; Transformer is Listed UL1876; Compliant BS/EN 60849 safety standards

Enclosure

Material

Finish

Grille

39

Injection molded, high impact polystyrene baffle on a steel enclosure

White (paintable)

Painted aluminum

Connectors

Mounting Hardware

Weight - Net / Shipping

Available Accessories

Ceramic block or 4-pin Euro terminals in fire protective sub-chamber

Rails and C-ring for ceiling tile installation

20 lb (9.1 kg) / 28 lb (12.7 kg)

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.

AD-C81Tw

11.5"

291 mm

Side

12.6"

321 mm

14.5"

368 mm

.3"

9 mm

Front

Dimensions | Frequency Response

Side

11.2"

285 mm

90

80

110

100

70

60

20 50 100 200 500 1K 2K Hz 5K 10k 20K

Frequency

Specifications 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. Patents may apply or be pending.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174

AD-C81Tw Spec Sheet - 06/18/08

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