8-inch 2-way, 90° conical DMT™

  • Hero front and angled view of the AD-C820 in-ceiling speaker with and without a speaker grill
  • Front and rear view of the AD-C820 in-ceiling speaker without a speaker grill

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  • 8-inch low-frequency woofer
  • 1.4-inch diaphragm compression driver
  • 200 watt continuous power rating
  • 70V/100V multi-tap transformer included (system can operate in distributed or low-impedance mode)
  • AD-C820 transducer/baffle assembly for separated backcan installation

AD-C820 is sold in the following system packages:

    • AD-C820 speaker baffle
    • AD-C800BB Backcan assembly
    • AD-C800RG Round grille (white, paintable)
    • AD-C820 speaker baffle
    • AD-C800BB Backcan assembly
    • AD-C800SG Square grille (white, paintable)
Configuration Passive
Low-frequency Transducer 8-inch (203 mm) ferrite woofer
Hight-frequency Transducer 1.4-inch (36 mm) neodymium compression driver
Frequency Range 1
Frequency Response (-6 dB)
Useable Frequency Range (-10 dB)

61 Hz to 18 kHz
52 Hz to 18 kHz
Maximum Output 2
Calculated Peak Output
Calculated Continuous Output

120 dB SPL
114 dB SPL
Nominal Coverage 90° horizontal and vertical
Nominal Impedance 16 ohms
Power Rating
Continuous power handling3
Recommended amplifier power
(loudspeaker "program" power)

200 W
400 W
Sensitivity 91 dB SPL, 1W/1m
Bass Loading Ported
Transformer Type Custom low distortion laminated core, wide bandwidth design
Transformer Taps 100 V: 16 ohms bypass, 100 W, 50 W, 25 W
70 V: 16 ohms bypass, 100 W, 50 W, 25 W, 12.5 W
Agency Rating CE, UL 1480 (commercial/professional use) UL 2043 (air handling spaces)


Enclosure Volume AD-C800BB: 18 liter (0.64 ft³)
Connectors Back box (AD-C800BB): ceramic block connector inputs and
“through” connectors (rated for 400 W max). Loudspeaker Baffle
(AD-C820): 10-pin MATE-N-LOK™ connector and faston connectors.
Mounting Hardware Pre-installed, suspended, back box, four vertical mounting straps.
Loudspeaker Baffle: captive, integral Mounting Clamps.
Weight - Net AD-C820: 8 lb (3.6 kg)
AD-C800BB: 9.5 lb (4.3 kg)
System Weight: 17.5 lb (7.9 kg)
Dimensions Diameter: 14.9-inch (379 mm)
Enclosure only Depth: 8.3-inch (211 mm)
Enclosure with mounting straps Depth: 11.2-inch (284 mm)

1All frequency ranges specified refer to measured half-space response (2 pi).
2Calculated maximum peak SPL at 1 m, half-space, speaker operating at rated rms power pink noise input, 50 Hz to 20 kHz.
3Maximum input power tested in accordance with IEC 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. MATE-N-LOK is a trademark of Tyco. All other trademarks are the property of their respective owners.