QSC AD-S402T AcousticDesign 4-Driver Column Surface Mount Speaker

The AD-S402T from QSC’s AcousticDesign series is a column surface-mount loudspeaker consisting of four weather-treated 2.75" transducers. It’s ideal in foreground and background sound reinforcement situations utilizing 70/100V or 16Ω bypass configurations. Among its many features, Intrinsic Correction™ voicings can be deployed to optimize installation and performance. Additionally, the AD-S402T uses a Progressive Taper Topology™ (PTT) network to create a passive curvature of the array line, reducing side-lobing problems and equipping you for precise and consistent directivity control.

Get the best speech intelligibility out of your installed sound. Maintain an accurate frequency response even in 70/100V applications. The AD-S402T’s low-loss, low-saturation 30-watt transformer offers selectable taps (including 16Ω bypass) and incorporates a rotary selector behind the sealed input cover plate. A removable wire sealing gland nut on the input cover plate enables direct cable attachments to a locking 4-pole Euro-style connector for added security of the wire terminations.

Myriad mounting options make the AD-S402T a versatile surface mount option for a wide variety of environments. Its unique pan/tilt mounting system offers multiple positioning locations, enabling you to keep the speaker close to the wall while achieving a downward tilt of up to -20°. The tilt section of the mount can also be removed when it’s not needed, letting you install the speaker even closer to the wall. The mount includes a zero pan locking screw in consideration of wind load conditions, as well as a shoulder eyebolt to provide a safety tether anchor point.

AcousticDesign speakers are free of obtrusive branding. They’re available in black or white, as well as paintable to match any décor. In addition to rugged ABS enclosures characteristic of AcousticDesign speakers, the AD-S402T boasts sealed input panel covers, weather-resistant powder-coated aluminum construction, and stainless steel hardware to exceed IEC60529 IP-54 ratings for dust and splash resistance.

More about QSC’s AcousticDesign Series

Easy installation, flexible mounting options, and rugged, high-weather resistance are just three of the features that set QSC’s AcousticDesign™ series apart. These premium loudspeakers are designed to give contractors and integrators versatile, reliable solutions for permanent sound installations. Unified by premium audio quality and consistent tonal characteristics this series is comprised of ceiling, surface, and pendant alternatives ideal for environments where you need the perfect combination of performance, coverage, and aesthetic appeal.

QSC AD-S402T Features

• Deliberately unobtrusive industrial design
• Available in white (RAL 9010) or black (RAL 9011)
• Paintable enclosure and grille
• Complete EASE, CLF, CAD & BIM information
• Rugged aluminum construction
• UV Inhibitors in all white models
• IP-54 rating for dust and splash resistance
• Powder-coated grille and weather-treated cones
• Close to wall pan/tilt bracket included
• Low saturation 70 V / 100 V transformers
• 16 ohm low impedance bypass
• Screw-down Euro block connector with loop-through
• Sealable input weather cup – keeps moisture away from wiring

• AD-S402T 4-Driver Column Surface-Mount Speaker1
• Sealed input cover plate with gland nut1
• Quick Hang Pan/Tilt wall bracket1
• Shoulder eyebolt safety tether anchor1

• LF Transducer(x4) 2.75 in (69.8 mm) weather treated paper cone woofer
• Effective frequency range [1, 2, 3, 8]110 Hz – 20 kHz
• Rated noise power / voltage [6]60 W / 31 V (rms)
• Sensitivity [dB]Rated @1 W, 1m 2, 3, 4, 8 : 85
• Coverage (‐6 dB) [°] Horizontal x Vertical [9]
  • Rated 2, 5, 8 : 150 x 35
  • 500 Hz: 180 x 90, 1kHz: 180 x 80
  • 2k Hz: 160 x 46, 4kHz: 180 x 28
• Directivity factor [2, 5, 8]11
• Directivity index [dB] [2, 5, 8]10.5
• Maximum SPL [dB]Rated, 1m (continuous / peak) 7 : 105 / 111
• Recommended amplifier120 W
• Transformer taps / impedance
  • Bypass: 16Ω
  • 7.5W (70V); 15W (100V) Tap: 666Ω
  • 15W (70V); 30W (100V) Tap: 333Ω
  • 30W (70V); 60W (100V) Tap: 167Ω
• Input connector typeEuroblock connector with parallel output
• Enclosure materialPowder coated aluminum
• Grille materialPowder coated aluminum
• Ingress protectionIP-54
• Operating environmentDesigned for indoor or outdoor use
• Operating temperature range-4 to 122° F (-20 to 50° C)
• Net weight7.5 lb (3.4 kg)
• Product dimensions (HxWxD)12.89x5.17x4.97 in (327.5 x 131.3 x 126.1 mm)
• Shipping Weight11 lb (5 kg)
• Shipping Dimensions (HxWxD)21.4x12.2x9.6 in (544x310x244 mm)
• Safety Agency
  • UL1480A
  • Transformer UL registered per UL1876, ROHS, CE compliant
• Notes
  • 1 -10dB from rated sensitivity
  • 2 Full-space, 4m
  • 3 Reference axis
  • 4 200 - 10kHz average
  • 5 1k - 10kHz average
  • 6 IEC, 2hrs
  • 7 Calculated from rated noise power and sensitivity
  • 8 Reference plane is the plane coincident with the loudspeaker baffle plane. Reference axis is the axis perpendicular to the reference plane and passing through the center of the baffle. Vertical plane is the plane intersecting the reference plane at a right angle, including the reference axis and the taps selector knob. Horizontal plane is the plane intersecting the reference plane and the vertical plane at a right angle, including the reference axis.
  • 9 Per EN54-24