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The QSC AcousticDesign™ AD-P4T is a 4.5-inch two-way pendant-mount loudspeaker ideally suited for a wide variety of foreground and background sound reinforcement applications which utilize 70/100V or 16Ω bypass configurations.



  • Consistent tonal characteristics across the entire AcousticDesign family in surface, ceiling, and pendant applications
  • DMT (Directivity Matched Transition™) waveguide ensures smooth, uniform frequency response over the coverage area
  • Snap-fit magnetic grille
  • 2x quick-link suspension cables and slip-lock fasteners provided
  • Intrinsic Correction™ voicings available via Q-SYS Ecosystem and CXD amplifiers
  • Low-saturation and low-loss 70/100V transformers with 16Ω bypass
  • Blemish-free removable logo
  • Sealable input cover to prevent moisture from entering the input terminal block
  • Available in black (RAL 9011) or white (RAL 9010)
  • Complete EASE, CF2, CAD, & BIM information available online


  • Effective frequency range 2 65 Hz – 20 kHz
    Rated noise power / voltage 1 30 watts / 22 volts (rms)
    Sensitivity [dB] 3
    Sensitivity at 4m, 100V maximum tap
    Rated coverage (-6 dB) 4 150° conical DMT™
    Directivity factor 4 4.5
    Directivity index [dB] 4 6.5
    Maximum continuous SPL [dB] 5 102
    Maximum peak SPL [dB] 5 108
    Nominal impedance [ohms] 16
    Recommended amplifier 60 watts
    Transformer taps / impedance 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
    LF transducer 114 mm [4.5-inch] weather treated paper cone woofer
    HF transducer 19 mm [0.75-inch] aluminum dome tweeter
    Input connector type Euroblock connector with parallel output
    Enclosure material Impact Resistant ABS
    Grille material Powder coated steel
    Ingress protection IP-34
    Operating environment Designed for indoor use
    Operating temperature range -20 to 50° C [-4 to 122° F]
    Net weight 2.9 kg [6.5 lb]
    Product dimensions (Diameter x Height) Ø 237 x 272 mm [Ø 9.3 x 10.7-inch]
    Shipping weight 3.9 kg [8.7 lb]
    Shipping dimensions (H x W x D) 298 x 362 x 286 mm [11.75 x 14.25 x 11.25-inch]
    Included mounting hardware Two quick-link cable assemblies (length 3.25m / 128-inch 2mm thickness), two slip-lock fasteners, locking euro-block connector, sealable input cover and screws, snap-fit magnetic grille.
    Safety Agency UL1480, Transformer UL registered per UL1876, ROHS, CE compliant. Baffle meets UL94-V0 and UL94-5VB flammability rating; in accordance with IEC60849 / EN60849 systems
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