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QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker

QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker
QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker
QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker
QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker

QSC AcousticDesign AD-S4T 4.5-Inch Surface Speaker

Item #108040
(0 Reviews)
USD$165.00 Request Price Match

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QSC AcousticDesign AD-S4T Surface Speaker


  • 4.5” weather treated woofer; 0.75” 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 range1: 68 Hz - 20 kHz
  • Rated noise power / voltage2: 50 watts / 20 volts (rms)
  • Broadband sensitivity3: 87 dB SPL
  • Coverage angle: (-6 dB) 120° conical DMT
  • Directivity factor (Q): 6
  • Directivity Index: 8 dB
  • Maximum continuous SPL4: 104 dB
  • Maximum peak SPL4: 110 dB
  • Rated impedance: 8 ohms
  • Recommended amplifier power (loudspeaker "program" power): 100 watts
  • Transformer taps:
    • 70 V: 30, 15, 7.5, 3.75 W and 8Ω bypass
    • 100V: 30, 15, 7.5 W and 8Ω bypass
  • HF transducer: 0.75” silk dome tweeter / 0.75” voice coil, horn loaded
  • LF transducer:
    • 4.5” weather resistant paper cone woofer
    • 1” / 25 mm voice coil
  • Input connector type: Euroblock connector with parallel output terminals
  • Enclosure material: Painted ABS polymer
  • Grille material: Powder coated aluminum
  • X-Mount material: Powder coated aluminum
  • Enclosure Details

  • Ingress protection: IP-54
  • Operating environment: Designed for indoor and outdoor use
  • Testing:
    • The AD Series loudspeakers qualified for outdoor use using the following tests:
    • Salt fog: MIL-STD-810G Method 509.5 for 100 hrs.
    • Humidity: MIL-STD-810G Method 507.5, Natural cycle B2, cyclic high RH for 7 days
    • High and low temperature: tested to QSC internal standards between -20° and 50° C
  • Net weight: 6.5 lb / 2.9 kg
  • Product dimensions (HWD) inches: 10.3 × 6.34 × 6.42
  • Product dimensions (HWD) mm: 261 × 161 × 163
  • Shipping weight: 16.8 lb / 7.65 kg (pair packed)
  • Shipping dimensions (HWD) inches: 15.5 × 10.3 × 18 (pair packed)
  • Shipping dimensions (HWD) mm: 394 × 261 × 458 (pair packed)
  • Included accessories:
    • X-Mount mounting system
    • Euroblock connector
    • input panel cover
… [ More ]
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