As the latest addition to the QSC Audio AcousticDesign (AD) Series, the model AD-S28Tw surface mount subwoofer is acoustically matched to all other offerings within the AD Series.
The new AD-S28Tw is specified as having a continuous power handling capacity of 250 watts and capabilities for managing up to 700 watt peaks, the new subwoofer has a 70/100-volt multi-tap transformer with eight ohm bypass, frequency response of 42 Hz-165 Hz, and sensitivity of 94 dB (1W/1m).
Two eight-inch woofers are outfitted with polypropylene cones for added protection in humid environments. The loudspeaker’s bandpass enclosure incorporates a pair of chambers - one that is completely sealed, and another with a large port.
Giving added precision to low frequency extension down to 36 Hz, the highly efficient design is further complemented by an onboard low-pass filter set at 120 Hz.
The enclosure offers marine-grade plywood construction, a zinc-plated steel grille with a black foam backing, molded ABS endcaps, and a rotatable logo, and it has also been fitted with a recessed rear input panel covered by a hinged door.
Nickel-plated input and output terminals accept wiring ranging from 18 AWG to 12 AWG. One switch selects between the 70/100V transformer taps, while another enables or disables the passive low-pass filter.
Attached rubber feet allow the device to be used on either the floor or a shelf. Forged-shoulder eyebolts, a steel yoke, and all related hardware are additionally included with each loudspeaker to offer options for suspended installation.
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