Sony’s SA-WM40 is a powered subwoofer that packs a 12-inch driver in a bass-reflex (vented) cabinet. An onboard amplifier delivers 120 watts of power to the driver. The SA-WM40 sports both line-level and speaker-level inputs, as well as a line output for connection to additional subwoofers for even more bass. The crossover is variable from 50 Hz-170 Hz. This will help you to match this sub to the bass characteristics of your main speakers. The phase switch allows you to correct any phase conflict that may occur between the sub and your satellite speakers.
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List Price: $ 249.99