QSC AD-S4T 4.5-inch 2-way, 120° conical DMT - Pair

  • $338.00

AcousticDesign™ surface loudspeakers offer a variety of models specifically tailored for demands of higher fidelity applications.  Designed for clarity and presence, these loudspeaker systems deliver pristine audio reproduction for installations requiring a refined audio experience.  Models ship complete with the award winning X-Mount™ system and weather input cover.

  • 4.5-inch weather treated woofer; 0.75-inch silk dome tweeter
  • 120° conical DMT coverage
  • 30 watt low-saturation and low-loss 70/100V transformer with 8Ω bypass
  • Maximum peak SPL 110 dB (8 ohm bypass)
  • DMT™ (Directivity Matched Transition) ensures smooth, uniform frequency response over the coverage area
  • X-Mount™ system enables the loudspeaker to be easily installed and deployed at a variety of angles with no slippage over time
  • Advanced voicing filter sets using QSC Intrinsic Correction™, available through either Q-SYS processing or CXD amplifier platforms
  • Lightweight ABS enclosures offer long-term durability and lasting good looks
  • Sealed input panel cover and powder coated aluminum grilles for added weather resistance
  • Meets IEC60529 IP-54 for dust and splash resistance
  • Available in black (RAL 9011) or white (RAL 9010)
  • Complete EASE, CF2, CAD, and BIM information available online


  • Effective Frequency Range: 68 Hz - 20 kHz
  • Rated Noise Power/Voltage: 50 Watts/ 20 volts (rms)
  • Broadband Sensitivity: 87 dB SPL
  • Coverage Angle (-6 dB): 120° conical DMT
  • Directivity Factor (Q): 6
  • Directivity Index: 8 dB
  • Maximum Continuous SPL: 104 dB
  • Maximum Peak SPL: 110 dB
  • Rated Impedance: 8 ohms
  • Recommended Amplifier Power: 100 watts
  • Transformer Taps: 70 V: 30, 15, 7.5, 3.75 W and 8O bypass
  • Transformer Taps: 100V: 30, 15, 7.5 W and 8O bypass
  • HF Transducer: 0.75-inch silk dome tweeter / 0.75-inch voice coil, horn loaded
  • LF Transducer: 4.5-inch weather resistant paper cone woofer/ 1-inch / 25 mm voice coil
  • Input Connector Type: Euroblock connector with parallel output terminals
  • Enclosure Materials: Painted ABD Polymer
  • Grille Material: Powder coated aluminium
  • X-Mount Material: Powder coated aluminium
  • Ingress Protection: IP-54
  • Operating Environment: Designed for indoor and outdoor use
  • Testing Method #1: Salt fog: MIL-STD-810G Method 509.5 for 100 hrs
  • Testing Method #2: Humidity: MIL-STD-810G Method 507.5, Natural cycle B2, cyclic high RH for 7 days
  • Testing Methods #3: High and low temperature: tested to QSC internal standards between -20° and 50° C


(2) QSC AD-S4T-BK Surface Mount Loudspeakers
(1) X-Mount Mounting System
(1) Euroblock Connector
(1) Input Panel Cover

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