The QSC Acoustic Design AD-S8T is a surface mounted 70/100 V, 8" two-way loudspeaker system, ideally suited for a wide variety of foreground and background sound reinforcement applications. The AD-S8T features a high quality 8” weather treated paper cone woofer on a 2” voice coil. A carefully selected 1” exit, 1.4” compression driver perfectly matches the sensitivity and performance of the woofer for outstanding full-range reproduction.  Consistent and even 105° axisymmetric (conical) coverage is achieved through DMT™ (Directivity Matched Transition), a QSC innovation which matches the directivity patterns of the woofer and the highfrequency 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 Ω bypass. To enhance weather resistance, the rotary selector is located on the back of the enclosure, protected by a weather grommet.

AD-S8T Features

  • DMT™ (Directivity Matched Transition) ensures smooth, uniform frequency response over the coverage area
  • Patent pending X-Mount™ enables the loudspeaker to be easily installed and deployed at a variety of angles without slipping over time
  • Optional yoke mount and M10 Kit-C eyebolt kit offers additional loudspeaker deployment options
  • Euroblock connectors allows pre-wiring of the system
  • Low saturation 70/100V transformers with 8 ohm bypass (S8T and S10T only)
  • Lightweight ABS enclosures offer long-term durability and lasting good looks
  • Available in black (RAL 9011) or white (RAL 9010)
System Details AD-S8T
Effective frequency range1 55 Hz - 20 kHz
Rated noise power / voltage2 200 watts / 40 volts (rms)
Broadband sensitivity3 90 dB SPL
Coverage angle (-6 dB) 105° conical DMT
Directivity factor (Q) 7
Directivity Index 9 dB
Maximum continuous SPL4 113 dB
Maximum peak SPL4 119 dB
Rated impedance 8 ohms
Recommended amplifier power (loudspeaker "program" power) 400 watts
Transformer taps 70 V: 60, 30, 15, 7.5 W and 8Ω bypass 100V: 60, 30, 15 W and 8Ω 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 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 24.1 lb / 11 kg
Product dimensions (HWD) inches 17.3 × 10 × 9.9
Product dimensions (HWD) mm 440 × 254 × 251
Shipping weight 32.1 lb / 14.5 kg
Shipping dimensions (HWD) inches 24.3 × 13.8 × 13.8
Shipping dimensions (HWD) mm 729 × 351 × 351 
Included accessories X-Mount mounting system, Euroblock connector, input panel cover
Optional accessories YMS8T yoke mount, M10 Kit-C
List price: $680.00
Price: $680.00
SKU: AD-S8T
Catalog: 
Surface, Box & Hanging Speakers
Brand: 
QSC Audio
Dimensions: 14 in × 14 in × 29 in
Weight: 34 lb