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QSC AD-S4TB 50W 4in Speakers (Pair) - Black

Model: QSC AD-S4TB

QSC AD-S4TB 50W 4in Speakers (Pair) - Black
QSC AD-S4TB 50W 4in Speakers (Pair) - Black
QSC AD-S4TB 50W 4in Speakers (Pair) - Black
QSC AD-S4TB 50W 4in Speakers (Pair) - Black
QSC AD-S4TB 50W 4in Speakers (Pair) - Black
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About: QSC AD-S4TB 50W 4in Speakers (Pair) - Black

QSC 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” 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

AD-S4T System Details

  • 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 (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” 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

UPC: 684284066534 is a Canadian authorized QSC retailer.

Reviews: QSC AD-S4TB 50W 4in Speakers (Pair) - Black

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Warranty: QSC AD-S4TB 50W 4in Speakers (Pair) - Black Warranty:

30 Days

Manufacturer's Warranty:

  • Amplifiers and Speakers: 3-year limited
  • Mixers and CP Series speakers: 1-year limited
  • RMXa, CMXa, PLX2, GX, GXD, K, KW, K.2 and KS: 3-year limited + additional 3 years of warranty upon registration on the QSC website for a total of 6 years limited warranty**
  • TouchMix-8, TouchMix-16, TouchMix-30 Pro: 1-year limited + additional 2 years of warranty upon registration on the QSC website for a total of 3 years limited warranty**
  • CP8 and CP12: 1-year limited + additional 5 years of warranty upon registration on the QSC website for a total of 6 years limited warranty**
  • Accessories: 90 days limited

**Registration on QSC website must be completed within 30 days of purchase**

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