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Are you getting a working unit with its remote for USD 90? If so, this is a strong deal rather than merely a fair price: comparable used examples appear around USD 70–75, making USD 90 reasonable for a clean, tested specimen with sensible pickup terms.
The DSW PRO 400 remains a capable compact subwoofer, combining an 8-inch driver with a 180-watt amplifier, useful LFE and speaker-level connections, adjustable phase, and Polk’s room-position EQ presets. It delivers controlled, musical bass and plenty of impact for a small-to-medium room, especially with bookshelves or modest home-theater speakers. The remote is genuinely useful, so confirm it is included, then test for clean output, reliable auto-on, and absence of hum or amplifier shutdown. At this price, a functioning example is an easy buy.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Polk Audio emerged in 1972 from the inventive spirit of three Johns Hopkins University graduates—Matthew Polk, a physics major, George Klopfer, and Sandy Gross—in Baltimore, Maryland. What began as a modest venture building public address systems for local events evolved into a dedicated speaker company after an initial contract fell through, leaving the founders to sell their redesigned cabinets directly. Fueled by passion for music and hi-fi innovation, they secured Small Business Administration loans, relocated operations, and rapidly scaled production, hitting $1 million in revenue by 1976 and earning a spot on Inc. magazine's list of America's fastest-growing private companies.
The brand has long focused on loudspeakers as its cornerstone, pioneering models like the Monitor 7 series for balanced dynamics, deep bass, and high-volume performance that bridged European refinement with American power. Polk expanded into automotive audio through partnerships like MOMO in 1999, while maintaining a core lineup of home speakers, including innovative SDA technology for enhanced soundstaging. Though not delving into amplifiers, turntables, DACs, headphones, or cables, their emphasis remains on reliable, high-fidelity transducers engineered for generations-spanning accuracy.
Polk Audio holds a solid mid-tier position in the hi-fi market, prized by enthusiasts for value-driven performance sold through specialty stereo shops and big-box retailers like Best Buy. Once publicly traded on NASDAQ in 1986 before going private in 1999, the brand now operates under Sound United, upholding its legacy of accessible excellence without chasing ultra-high-end exclusivity or vintage obscurity.
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