{"product_id":"polk-audio-sda-1-classic-big-boy-system","title":"Polk Audio SDA-1 Classic \"Big Boy\" System","description":"\u003cp\u003e\u003cstrong\u003ePolk Audio \u003c\/strong\u003ewas founded in Baltimore in 1972 by Johns Hopkins University graduates Matthew Polk, George Klopfer, and Sandy Gross.\u003c\/p\u003e\n\u003cp\u003eThe Early Years (1972–1985)Origins: Started with $200 in capital, initially building public address systems for local bluegrass and fiddler conventions.\u003c\/p\u003e\n\u003cp\u003eBreakthrough: Released the Monitor 7 in 1974, establishing the brand's reputation for high-end sound at accessible prices.\u003c\/p\u003e\n\u003cp\u003eInnovation: Became the first speaker manufacturer to use laser interferometry in 1986 to measure and refine speaker performance.\u003c\/p\u003e\n\u003cp\u003eExpansion and Public Trading (1986–1999) IPO: Went public in 1986 with an initial public offering listed on NASDAQ. Polk Audio restructured through the 1990s, shifting manufacturing and returning to private ownership in 1999\u003c\/p\u003e\n\u003cp\u003eAmong the companies greatest success stories was the SDA line of Monitors and Floor-standers. One will experience a truly immersive, room-filling sound with the legendary Polk Audio SDA 1 speakers. These iconic floorstanders feature Polk’s patented \u003cstrong\u003eStereo Dimensional Array (SDA)\u003c\/strong\u003e technology, designed to eliminate interaural crosstalk and create an expansive, three-dimensional soundstage that extends beyond the physical placement of the speakers. The SDA 1 delivers remarkable depth and imaging, powered by dual midrange drivers, a dimensional array driver, and a smooth, detailed tweeter per cabinet. Built during the golden era of American hi-fi, these speakers combine craftsmanship, clarity, and musical warmth, making them sought after by collectors and audiophiles alike. For this particular set, out tech team cleaned and detailed the cabinets, drivers inspected and tested for accurate response \u0026amp; they play on-point! SDA interconnect verified and all in all, this is a exemplary set of totally iconic Polk big floor-standers.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eImportant Stuff:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eType: Stereo Dimensional Array Floorstanding Speakers (Pair)\u003cbr\u003eFrequency Response: 20 Hz – 26 kHz\u003cbr\u003eImpedance: 6 ohms nominal\u003cbr\u003eSensitivity: 90 dB\u003cbr\u003eRecommended Amplifier Power: 20 – 300 watts per channel\u003cbr\u003eDrivers (per cabinet): 1 × 1\" Dome Tweeter, 2 × 6.5\" Midrange Drivers, 1 × 12\" Passive Radiator, 1 × SDA Dimensional Array Driver\u003cbr\u003eCrossover: SDA Interconnect cable required between speakers for dimensional effect\u003cbr\u003eConnections: 5-way binding posts + SDA interconnect socket\u003cbr\u003eEnclosure Type: Passive radiator, floorstanding\u003cbr\u003eDIMENSIONS: 144\" × 16\" × 12\"  (W × H × D) - Weight: 75 lbs\u003c\/p\u003e\n\u003cp\u003eCome have a listen to these Big Boy Polks here at the Andover shop, their performance is pure magic.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePolk Audio SDA-1 Tower Speaker System: $1499.00 plus shipping and sales tax when applicable.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e* These need to be freight shipped, delivered by our own regional currier SVC or of course, local pick up. Check with us about these options.\u003c\/em\u003e\u003c\/p\u003e","brand":"Holt Hill Audio","offers":[{"title":"Default Title","offer_id":43740236480579,"sku":null,"price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2197\/6387\/files\/PhotoSep012026_23654PM.jpg?v=1788289238","url":"https:\/\/holthill.com\/products\/polk-audio-sda-1-classic-big-boy-system","provider":"Holt Hill Audio","version":"1.0","type":"link"}