null Skip to main content
QSC AD-S28Tw Surface Mount Subwoofer
QSC AD-S28Tw Surface Mount Subwoofer

QSC AD-S28Tw Surface Mount Subwoofer

(No reviews yet)
SoundPro Item: 46615
Add to Wish List

Account manager
Have a Question? Ask an Account Manager

The AcousticDesign Series of installation loudspeaker products from QSC expands with the new AD-S28Tw surface mount subwoofer system. Designed to supplement audio systems by adding low-frequency extension, the AD-S28Tw is acoustically matched to the entire AD Series. Rated for 250 watts continuous power handling and able to take up to 700 watt peaks, the AD-S28Tw is a great complement to any of the ceiling-mount or surface-mount AD Series models.

The dual 8" woofers are equipped with polypropylene cones for protection in humid environments. The bandpass enclosure features two chambers. One chamber is completely sealed, while the other chamber features a large port. The bandpass design allows for tight precise bass with extension down to 36 Hz. This highly efficient design produces a 1W at 1m sensitivity of 94 dB SPL. The AD-S28Tw has a built-in passive low-pass filter set at 120 Hz.

QSC AD-S28Tw Features

  • Dual 8" polypropylene cone woofers
  • Large port area for extended low-frequency performance
  • Dual chamber ported bandpass cabinet
  • Defeatable passive 120 Hz low-pass filter with impedance compensation
  • 250 watts continuous power handling, 700 watts peak
  • 70/100V multitap transformer with 8 ohm bypass
  • Yoke mount and flying hardware included
  • Marine grade plywood construction
  • AD-S28Tw Surface Mount Subwoofer1
  • ConfigurationSurface mount bandpass subwoofer, ported
  • Low-frequency transducerDual 8-inch (200 mm) weather resistant, polypropylene cone woofers, rubber surround
  • Frequency range 1
    • Frequency response (-6 dB): 42 to 165 Hz
    • Useable frequency range (-10 dB): 36 to 205 Hz
  • Filter120 Hz low-pass, passive, bypassable
  • Maximum output 2
    • Calculated peak / continuous Output
      • 2 pi (half space): 124 dB SPL / 118 dB SPL
      • 4 pi (full space): 118 dB SPL / 112 dB SPL
  • Nominal impedance8 ohms
  • Power rating
    • Continuous power handling3
    • Recommended max amp power
      • 250W (2 hours IEC)
      • 500W (loudspeaker "program" power)
    • Sensitivity: 94 dB, 2.83V at 1 m, half space (2 pi)
  • Transformers
    • Type: Custom low distortion laminated core, wide bandwidth design
    • Taps
      • 70V: 200, 100, 50, 25 W; 8Ω bypass
      • 100V: 200, 100, 50 W; 8Ω bypass
  • Enclosure
    • Material: Marine grade plywood, ABS, steel grille
    • Environmental: Exceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X4 splash rating
    • Finish: Textured black paint
    • Grille: Painted steel
    • Connectors: Four-position barrier strip; 2 in / 2 out
    • Mounting Hardware
      • Black powder coated steel yoke with attachment hardware
      • Black zinc coated forged shoulder steel M6 eyebolts
      • Black powder coated steel shear plates with attachment hardware
      • Black rubber feet with integral threaded bolt
    • Net Weight: 43 lbs (19.5 kg)
    • Shipping Weight: 55 lbs (25 kg)
  • Notes
    • 1 All frequency ranges specified refer to measured free field response.
    • 2 Calculated SPL at 1 m, speaker operating at rated RMS power with pink noise within specified frequency range
    • 3 Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz – 20 kHz band limiting, 6 dB signal crest factor.

In The Box

Videos Hide Videos Show Videos

Customer Reviews