User manual
QSC AcousticDesign 4.5" 2-Way Ceiling Loudspeaker

User Manual for QSC AcousticDesign 4.5" 2-Way Ceiling Loudspeaker

• Product category: Installed Speakers QSC
• Brand: QSC
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for QSC Installed Speakers

Product description

• Consistent tonal characteristics for surface, ceiling, and pendant applications

• DMT (Directivity Matched Transition) waveguide ensures smooth, uniform frequency response over the coverage area

• Snap-fit magnetic grill

• 3x double-stepped, long-travel dog-ear blind mount system

• Intrinsic Correction voicings available via the Q-SYS Platform including CXD amplifiers

• Blemish-free removable logo

• Removable conduit cover plate

• UL1480 and UL2043 certified EN54-24 Type A, 0359-CPR-00623

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Technical parameters

QSC AD-C4T-BK Specs

Low Frequency Transducer	4.5" / 110 mm weather-treated paper cone woofer
High Frequency Transducer	0.75" / 19 mm aluminum dome tweeter
Frequency	70 Hz - 20 kHz
Power	30 W / 22 V (rms)
Sensitivity	87 dB (rated at 1 W, 1 m) 73 dB (EN54-24 at 1 W, 4 m)
Coverage	150° conical Directivity Matched Transition (rated at -6 dB) Horizontal / Vertical: 500 Hz: 176° / 176° 1 kHz: 160° / 160° 2 kHz: 156° / 152° 4 kHz: 103° / 111°
SPL	(Hz : dB): 500: 59.1; 630: 59.4; 800: 60.0; 1000: 60.0; 1250: 61.0; 1600: 60.5; 2000: 62.3; 2500: 61.0; 3150: 58.0; 4000: 62.2
Equalization	EN54-24 Equalization: High Pass, 24 dB/oct, Butterworth, Fc: 70 Hz Low Shelf, 12 dB/oct, (Q)1.2 / (BW)1.17, Fc: 340 Hz, gain: -5 dB High Shelf, 12 dB/oct, (Q)0.8 / (BW)1.70, Fc: 6 kHz, gain: +5 dB
Directivity Factor	4.5
Directivity Index	6.5 dB
Maximum SPL	102 dB / 108 dB (rated, 1 m (continuous / peak) 85.51 dB / 86.52 dB (EN54-24, 4 m (low-Z / highest-tap)
Recommended Amplifier Power	60 W
Transformer Taps	Bypass: 16 Ohms 3.75 W (70 V); 7.5 W (100 V) Tap: 1333 Ohms 7.5 W (70 V); 15 W (100 V) Tap: 667 Ohms 15 W (70 V); 30 W (100 V) Tap: 333 Ohms 30 W (70 V); N/A (100 V) Tap: 167 Ohms
Input	Euroblock connector with parallel output
Enclosure	ABS baffle on powder coated steel back can
Grille	Powder-coated steel
Rating	IP34, designed for indoor use
Safety	EN54-24: 2008 type A, 0359-CPR-00623 UL1480, UL2043, NFPA90, NFPA70 suitable for use in air handling spaces. Transformer UL registered per UL1876, ROHS, CE compliant Baffle meets UL94-V0 and UL94-5VB flammability rating; in accordance with IEC60849 / EN60849 systems
Operating Temperature	-4 to 122°F / -20 to 50°C
Cutout Diameter	7.68" / 195 mm
Dimensions	Rating 70% users recommend this product to others. And what about you? This product has already been rated by 81 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. The discussion is empty - enter the first post Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR