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The black AcousticDesign Series QSC AD-S5T is a pair of transformer-equipped, 5.25" surface-mount loudspeakers supplied with award-winning X-Mount systems, making them suitable for 70/100V or 8-ohm operation in a variety of foreground and background music applications, whether installed in horizontal, vertical, wall, or ceiling deployments.

Outfitted with a 5.25" weather-treated woofer and a 1" silk dome tweeter on a DMT waveguide, the AD-S5T offers even 115° conical coverage and improved off-axis response while providing a frequency range of 65 Hz to 20 kHz (-10 dB). The speaker is capable of handling 100W RMS and producing a peak maximum SPL of 116 dB.

The AD-S5T utilizes a 4-pole Euroblock connector under a sealed input cover for easy wiring and protection from moisture. Featuring a rugged ABS enclosure and a powder coated aluminum grille, the AD-S5T boasts dust and splash resistance beyond IP54 ratings for worry-free operation indoors or outside.

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Key Features

  • 5.25" Woofer and 1" Silk Dome Tweeter
  • 100W RMS Power Handling
  • 115° Conical Coverage
  • 116 dB Peak Maximum SPL
  • 65 Hz to 20 kHz Frequency Range
  • Low-Saturation Multi-Tap Transformer
  • Supports 70V, 100V, or 8-Ohm Operation
  • Euroblock Connector for Easy Wiring
  • Includes Award-Winning X-Mount Systems

Technical Specification


Active or Passive Passive
Number of Included Speakers 2
Speaker Configuration 2-Way
Power Handling For 2 Hours:
100 W RMS
Recommended Amplifier Power 300 W
Constant Voltage / Transformer Taps 70 V:
60 / 30 / 15 / 7.5 W

100 V:

60 / 30 / 15 W or 8 Ohms Bypass
Impedance 8 Ohms (Transformer Bypassed)
Enclosure Type Sealed
Shielded No
HF Driver 1 x 1" / 2.5 cm Horn-Loaded Silk Dome Tweeter
HF Voice Coil 1" / 2.5 cm
LF Driver 1 x 5.25" / 13.34 cm Paper Woofer
LF Voice Coil 1" / 2.54 cm
Magnet Neodymium
Frequency Range 65 Hz to 20 kHz -10 dB
Maximum SPL 106 dB (Continuous)
116 dB (Peak)
Sensitivity 86.3 dB SPL
Coverage Angle 115° (Conical)
Directivity 6.9 (Directivity/Q Factor)
8.4 dB (Directivity Index)
I/O 1 x Block 4-Pole Speaker Input/Thru (Removable)
Water / Weather Resistance Dust Resistant, Humidity Resistant, Water Resistant
IP Rating IP54
Operating Temperature -4 to 122°F / -20 to 50°C
Color Black
Mounting 1 x Bracket Point (Rear)
Construction Material ABS, Aluminum Grille, Polymer
Dimensions 11.26 x 6.88 x 6.85" / 28.6 x 17.48 x 17.4 cm
Weight 9.9 lb / 4.5 kg (Each Speaker)
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