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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 or CXD amplifier platform

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


  • System Details AD-S4T
    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-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 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
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