4" 2-Way AcousticDesign Speaker with Transformer in White


The AD-S4T is part of the AcousticDesign™ speaker line from QSC and offers integrators a premium quality installed sound solution where performance, coverage, and aesthetics are essential. This model features low-loss, low-saturation transformers with selectable taps, including an 8 Ohm bypass—and—to enhance weather resistance, the rotary selector located on the back of the enclosure is protected by a weather grommet. Consistent and even axisymmetric coverage is achieved through its Directivity Matched Transition (DMT™), which matches the directivity patterns of the woofer and the high-frequency waveguide at the crossover point. The result is a coherent transition between transducers and improved off-axis response. To further enhance performance and speed of install with optimum result, advanced voicing filter sets using QSC Intrinsic Correction™ are obtainable using Q-Sys networked audio processing platforms, including CXD amplifiers, for a complete QSC systems solution.

Installers will appreciate the award-winning X-Mount™ system included with each full-range AcousticDesign model. This innovative mounting solution achieves unprecedented ease-of-installation in horizontal, vertical, wall, or ceiling deployments. Knurled surfaces at the pivot planes ensure the load will not drift or sag over time. Articulation marks allow pre-configuration of the X-Mount™ while on the ground with no special tools required. Once secure, the loudspeaker installs in seconds, allowing the installer to work safer, smarter, and faster with repeatable results.

AcousticDesign speakers are easy to install and offer high weather resistance. They provide integrators with a versatile install solution over a wide range of foreground and background sound reinforcement uses.

With rugged ABS enclosures, sealed input panel covers, and powder-coated aluminum grilles for weather resistance, the AcousticDesign surface mounted series exceed IEC60529 IP-54 ratings for dust and splash resistance.

QSC Acoustic Design AD-S4T Includes:

  • AD-S4T speaker
  • X-Mount mounting system
  • Euroblock connector
  • Input panel cover

QSC Acoustic Design AD-S4T Features:

  • 4" weather-treated woofer; 0.75" silk dome tweeter
  • 120° Axisymmetric (conical) coverage
  • 30 watt low-saturation and low-loss 70/100V transformer with 8 Ohm bypass
  • Maximum peak SPL 110 dB (8 ohm bypass)
  • DMT 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 overtime
  • 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
  • Complete EASE, CF2, CAD, and BIM information available online

QSC Acoustic Design AD-S4T Specifications:

  • Effective frequency range: 68 Hz to 20 kHz
    *Free-field, -10 dB from on-axis sensitivity
  • Rated noise power / voltage*: 50 watts / 20 volts (rms)
    *IEC60268-1 noise signal for 2 hours
  • Broadband sensitivity*: 87 dB SPL
    *On-Axis, free-field sensitivity, 2.83V, 1 m
  • Coverage angle (-6 dB): 120°
  • Directivity factor (Q): 6
  • Directivity Index: 8 dB
  • Maximum continuous SPL**: 104 dB
  • Maximum peak SPL**: 110 dB
    **Calculated from rated noise voltage and sensitivity
  • Rated impedance: 8 ohms
  • Recommended amplifier power (loudspeaker "program" power): 100 watts
  • Transformer taps:
    • 70 V: 30, 15, 7.5, 3.75 W and 8 Ohm bypass
    • 100V: 30, 15, 7.5 W and 8 Ohm bypass
  • HF transducer:
    • 0.75" silk dome tweeter
    • 0.75" voice coil, horn loaded
  • LF transducer:
    • 4" weather resistant paper cone woofer
    • 1" / 25 mm voice coil
  • Input connector type: Euroblock connector with parallel output terminals
  • Housing color: White
  • Enclosure material: Painted ABS polymer
  • Grille material: Powder-coated aluminum
  • X-Mount material: Powder-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° C and 50° C
  • Net weight: 6.5 lbs (2.9 kg)
  • Product dimensions: 10.3" x 6.34" x 6.42" (261 x 161 x 163mm)
  • Shipping weight: 16.8 lbs (7.65 kg) (pair packed)
  • Shipping dimensions: 15.5" x 10.3" x 18" (394 x 261 x 458mm) (pair packed)
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