QSC AD-S28Tw Dual 8 inch Surface Mount Subwoofer
Part # AD-S28Tw-BK
Model # AD-S28Tw
The QSC AD-S28Tw, part of the AcousticDesign series from QSC, is a professional-quality surface mount subwoofer designed to provide low frequency enhancement to ceiling or surface mount AD-series speakers.
Availability: Usually arrives in 5-9 business days.

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Description

Details

Designed to supplement audio systems by adding low-frequency extension, the new 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.

The marine grade plywood enclosure is built to the highest standard to provide exceptional resistance to high humidity. The zinc-plated steel grille has a black foam backing, molded ABS endcaps and a rotatable logo. On the rear of the enclosure is the input cup with a hinged door to conceal the controls and input connections. Input and output nickel plated screw terminals accept wiring from 18 AWG (1.02 mm) to 12 AWG (2.053 mm). Two rotary switches can be found in the input cup. One switch selects between the 70V / 100V transformer taps, while the other switch enables or disables the internal passive low-pass filter.

The AD-S28Tw can be deployed in a number of ways. With the included rubber feet attached, the subwoofer can be floor or shelf-standing. Suspended installation is available with either the included forged-shoulder eyebolts and accessories or the included steel yoke.
Features

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
  • 70/100 V multitap transformer with 8 ohm bypass
  • Yoke mount and flying hardware included
  • Marine grade plywood construction
Specification
ConfigurationSurface mount bandpass subwoofer, ported
Low-frequency TransducerDual 8" (200 mm) weather resistant, polypropylene cone woofers, rubber surround
Frequency Response (-6 dB)42 Hz – 165 Hz
Useable Frequency Range (-10 dB)36 Hz – 205 Hz
Filter120 Hz low-pass, passive, bypassable
Calculated Peak / Continuous Output2π (half space) - 124 dB SPL / 118 dB SPL4π (full space) - 118 dB SPL / 112 dB SPL
Nominal Impedance8 Ω
Power Rating
Continous Power Handling250 W (2 hours IEC)
Recommended Max Amp Power500 W RMS
Sensitivity94 dB, 2.83 V, 1 m, half space (2π)
Transformers TypeCustom low distortion laminated core, wide bandwidth design
Transformer Taps70V: 200, 100, 50, 25W
100V: 200, 100, 15W
8Ω selected by switch
EnvironmentalExceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X4 splash rating
Enclosure
MaterialMarine grade plywood, ABS, steel grille
GrillePainted steel
Connectors4 position barrier strip; 2 in / 2 out
FinishTextured black paint
Net Weight43 lbs (19.5 kg)
Shipping Weight55 lbs (25 kg)
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