Central to the AD-S28Tw's high performance prowess are a pair of 8" woofers 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.
Featuring marine-grade plywood construction, a zinc-plated steel grille with a black foam backing, moulded ABS endcaps, and a rotatable logo, the AD-S28Tw enclosure has additionally been fitted with a recessed rear input panel covered by a hinged door. Nickel-plated input and output terminals found on the subwoofer 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.
(Jim Evans)