
QSC AD-C81TW-WH AcousticDesign 8" In-Ceiling Mount Subwoofer

Expected May 31, 2025
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AD-C81TW-WH 8" In-Ceiling 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.
QSC AD-C81TW-WH AcousticDesign 8" In-Ceiling Mount Subwoofer Specifications:
1All frequency ranges specified refer to measured free field responseConfiguration Ceiling subwoofer, ported Low-frequency Transducer 8" (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 HzFilter 120 Hz low pass, passive, bypassable Maximum Output 2
Calculated Peak Output
Calculated Continuous Output
118 dB SPL
112 dB SPLNominal Impedance 8 ohms switchable Power Rating
Continuous power handling3
Recommended amplifier power (loudspeakerprogram" power)
100 W (100 hours IEC)
200 WSensitivity 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; 8ΩEnvironmental 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) ShippingAvailable Accessories ADC-MRS Mud ring bracket • ADC-NCS New construction bracket
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
(1) QSC AD-C81TW-WH AcousticDesign 8" In-Ceiling Mount Subwoofer
(1) C-ring and tile rails
(1) Round grille (white, paintable)
(1) Paint mask
(1) Connector assembly