The QSC AcousticDesign™ AD-C4T is a 4.5" two-way ceiling loudspeaker ideally suited for a wide variety of foreground and background sound reinforcement applications which utilize 70/100V or 16Ω bypass configurations. The AcousticDesign™ Series offers integrators a premium quality installed sound solution where performance, consistent coverage, and aesthetics are paramount. Specifically designed to maintain a consistent tonal characteristic across the entire family in ceiling, surface, and pendant applications, the AcousticDesign Series allows integrators seamless transitions within blended installations. The AD-C4T features a high quality 4.5" weather treated paper cone woofer with a 1" voice coil and a .75" aluminum dome tweeter which is positioned on a DMT waveguide. DMT (Directivity Matched Transition™) is QSC’s design philosophy where the high frequency waveguide is matched to the natural conical behavior of the woofer at the crossover point. The result is a coherent transition between transducers with improved off-axis power response for consistent 150° conical DMT coverage. The accurate frequency response of the AD-C4T is maintained even in 70/100V applications by use of a low-loss, lowsaturation 30-watt transformer with selectable taps, including 16Ω bypass, using a rotary selector located under the snap-fit magnetically attached powder coat steel grille.
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Effective frequency range1
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70 Hz – 20 kHz
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Rated noise power / voltage2
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30 watts / 22 volts (rms)
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Sensitivity [dB]3
Sensitivity at 4m,
100V maximum tap
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87.5
TBD
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Rated coverage (-6 dB)4
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150° conical DMT
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Directivity factor (Q)4
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4.5
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Directivity index (DI) [dB]4
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6.5
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Maximum continuous SPL [dB]5
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102
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Maximum peak SPL [dB]5
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108
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Nominal impedance [ohms]
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16
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Recommended amplifier
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60 watts
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Transformer taps / impedance
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16Ω (in bypass setting)
3.75W (70V); 7.5W (100V) Tap: 1333Ω
7.5W (70V); 15W (100V) Tap: 667Ω
15W (70V); 30W (100V) Tap: 333Ω
30W (70V); N/A (100V) Tap: 167Ω
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LF transducer
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114 mm [4.5-inch] weather resistant paper cone woofer
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HF transducer
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19 mm [0.75-inch] aluminum dome tweeter
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Input connector type
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Euroblock connector with parallel output
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Enclosure material
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ABS baffle on powder coated steel back can
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Grille material
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Powder coated steel
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Ingress protection
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IP-34
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Operating environment
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Designed for indoor use
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Operating temperature range
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-20 to 50° C [-4 to 122° F]
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Cutout dimension
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Ø 195 mm [Ø 7.68-inch]
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Net weight
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2.9 kg [6.4 lb]
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Product dimensions (Diameter x Height)
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Ø 230 x 176 mm [Ø 9.06 x 6.93-inch]
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Shipping weight
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9.3 kg [20.5 lb] (pair packed)
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Shipping dimensions (H x W x D)
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279 x 711 x 318 mm [11 x 28 x 12.5-inch] (pair packed)
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Included accessories
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C-ring and tile rails, rail screws, euroblock connector, cut-out template, grille
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Optional accessories
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AD-MR4 (pre-install mud ring)
AD-CC4 (pre-install conduit cover)
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Safety Agency
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EN54-24: 2008 type A (No. pending)
UL1480, UL2043, NFPA90, NFPA70 suitable for use in air handling spaces. Transformer UL registered per UL1876, ROHS, C-Tick X000, CE compliant. Baffle meets UL94-V0 and UL94-5VB flammability rating; in accordance with IEC60849 / EN60849 systems.
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