Surface-Mounted Speakers

The QSC AcousticDesign AD-S8T is a surface mounted 70/100V, 8 inch 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.

The AD-S8T features a high quality 8 inch weather treated paper cone woofer on a 2 inch voice coil. A carefully selected 1 inch exit, 1.4 inch compression driver perfectly matches the sensitivity and performance of the woofer for outstanding full-range reproduction.

Consistent and even 105 deg axisymmetric (conical) coverage is achieved through DMT (Directivity Matched Transition), a QSC innovation 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.

The even, accurate frequency response of the AD-S8T is aided by a 60-watt low-loss, low-saturation transformer with selectable taps, including an 8 OHM bypass. To preserve weather resistance, the rotary selector is located on the back of the enclosure, protected by a weather grommet.

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.

Installers will appreciate the award-winning X-Mount system included with each full- range AcousticDesign model. This ingenious 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 preconfiguration 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.

The AD-S8T also includes M10 fittings for optional yoke mount (YMS8T) or shoulder eybolt (M10 Kit-C) accessories for installation versatility.

To further enhance performance and speed of install with optimum result, advanced voicing filter sets using QSC Intrinsic Correction techniques are obtainable using Q-Sys networked audio processing platforms, including CXD amplifiers for a complete QSC systems solution.

The AcousticDesign series feature a stylish appearance free of obtrusive logo adornments for aesthetically sensitive installations. AcousticDesign surface loudspeakers are available in QSC standard black (RAL 9011) or white (RAL 9010) and may be painted to match any decor.

Key Features

  • 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 8 OHM 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
  • M10 fittings for optional yoke mount or suspended installations
  • Available in black (RAL 9011) or white (RAL 9010)

Technical Specifications

Effective Frequency Range
55 Hz – 20 kHz
Rated Noise Power / Voltage
200 watts / 40 volts (rms)
Broad-Band Sensitivity
90 dB SPL
Coverage Angle (-6 dB)
105 deg
Directivity Factor (Q)
Directivity Index
9 dB
Maximum Continuous SPL
113 dB
Maximum Peak SPL
119 dB
Rated Impedance
8 ohms
Recommended Amplifier
400 watts
Transformer Taps
70 V: 60, 30, 15, 7.5 watts and 8 ohm bypass
100V: 60, 30, 15 watts and 8 ohm bypass
HF Transducer
1 inch exit / 1.4 inch voice coil compression driver
LF Transducer
8 inch weather resistant paper cone woofer,
2 inch / 51 mm voice coil
Input Connector Type
Euroblock connector with parallel output
Enclosure Material
Painted ABS polymer
Grille Material
Powder coated aluminum
X-Mount Material
Powder coated aluminum
Ingress Protection
Operating Environment
Designed for indoor and outdoor use
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 deg and 50 deg C
Operating Temperature Range
-20 to 50 deg C / -4 to 122 deg F
Net Weight
24.1 lb / 11 kg
Product Dimensions
17.3 x 10 x 9.9 inches (440 x 254 x 251 mm)
Shipping Weight
32.1 lb / 14.5 kg
Shipping Dimensions
24.3 x 13.8 X 13.8 inches (729 x 351 x 351 mm)
Included Accessories
X-Mount mounting system, euroblock connector, input panel cover
Optional Accessories
YMS8T yoke mount, M10 Kit-C


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