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

QSC AD-S4T 4.5-Inch Surface Mount Speaker

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SoundPro Item: 25914

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The QSC AcousticDesign™ AD-S4T is a surface mounted 70/100V, 4" two-way loudspeaker system, ideally suited for a wide variety of foreground and background sound reinforcement applications.

AcousticDesign™ series offers integrators a premium quality installed sound solution where performance, coverage, and aesthetics are paramount. Combined with unprecedented ease-of-installation and high weather resistance, the AcousticDesign™ series provides integrators a versatile and confident install solution.

QSC AD-S4T Features

  • Priced individually, sold in quantities of 2
  • 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
  • Low-saturation and low-loss 70/100V transformers with 8Ω bypass
  • 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
  • AD-S4T 4.5-Inch Surface Mount Speaker2
  • Effective frequency range1 68 Hz - 20 kHz
  • Rated noise power / voltage250 watts / 20 volts (rms)
  • Broadband sensitivity387 dB SPL
  • Coverage angle (-6 dB)120° conical DMT™
  • Directivity factor (Q)6
  • Directivity Index8 dB
  • Maximum continuous SPL4104 dB
  • Maximum peak SPL4110 dB
  • Rated impedance8 ohms
  • Recommended amplifier power (loudspeaker "program" power)100 watts
  • Transformer taps
    • 70V: 30, 15, 7.5, 3.75W and 8Ω bypass
    • 100V: 30, 15, 7.5W and 8Ω bypass
  • HF transducer0.75-inch silk dome tweeter / 0.75-inch voice coil, horn loaded
  • LF transducer4.5-inch weather resistant paper cone woofer, 1-inch / 25 mm voice coil
  • Input connector typeEuroblock connector with parallel output terminals
  • Enclosure materialPainted ABS polymer
  • Grille materialPowder coated aluminum
  • X-Mount materialPowder coated aluminum
  • 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 weight6.5 lbs (2.9 kg)
  • Product dimensions (HxWxD)10.3x6.34x6.42" (261x161x163mm)
  • Shipping weight16.8 lbs (7.65 kg), pair packed
  • Shipping dimensions (HxWxD)15.5x10.3x18" (394x261x458mm), pair packed
  • Notes
    • 1 Free-field, -10 dB from on-axis sensitivity
    • 2 IEC60268-1 noise signal for 2 hours
    • 3 On-Axis, free-field sensitivity, 2.83V, 1 m
    • 4 Calculated from rated noise voltage and sensitivity

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