QSC AD-S4T 4.5-Inch Surface Mount Speaker

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