{"product_id":"qsc-ad-s28tw-bk","title":"QSC {QSYS} AD-S28TW-BK","description":"\u003cp\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eThe AcousticDesign Series of installation loudspeaker products from QSC expands with the new AD-S28Tw surface mount subwoofer system. Designed to supplement audio systems by adding low-frequency extension the new AD-S28Tw is acoustically matched to the entire AD Series. Rated for 250 watts continuous power handling and able to take up to 700 watt peaks the AD-S28Tw is a great complement to any of the ceiling-mount or surface-mount AD Series models. \u003cbr\u003e\r\n\u003cbr\u003e\r\nThe dual 8\" woofers are equipped with polypropylene cones for protection in humid environments. The bandpass enclosure features two chambers. One chamber is completely sealed while the other chamber features a large port. The bandpass design allows for tight precise bass with extension down to 36 Hz. This highly efficient design produces a 1W at 1m sensitivity of 94 dB SPL. The AD-S28Tw has a built-in passive low-pass filter set at 120 Hz. \u003cbr\u003e\r\n\u003cbr\u003e\r\nThe marine grade plywood enclosure is built to the highest standard to provide exceptional resistance to high humidity. The zinc-plated steel grille has a black foam backing molded ABS endcaps and a rotatable logo. On the rear of the enclosure is the input cup with a hinged door to conceal the controls and input connections. Input and output nickel plated screw terminals accept wiring from 18 AWG (1.02 mm) to 12 AWG (2.053 mm). Two rotary switches can be found in the input cup. One switch selects between the 70V \/ 100V transformer taps while the other switch enables or disables the internal passive low-pass filter. \u003cbr\u003e\r\n\u003cbr\u003e\r\nThe AD-S28Tw can be deployed in a number of ways. With the included rubber feet attached the subwoofer can be floor or shelf-standing. Suspended installation is available with either the included forged-shoulder eyebolts and accessories or the included steel yoke.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFEATURES \u003cbr\u003e\r\n\u003c\/font\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\"\u003eDual 8\" polypropylene cone woofers \u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eLarge port area for extended low-frequency performance \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eDual chamber ported bandpass cabinet \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eDefeatable passive 120 Hz low-pass filter with impedance compensation \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003e250 watts continuous power handling 700 watts peak \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003e70\/100 V multitap transformer with 8 ohm bypass \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eYoke mount and flying hardware included \u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n    \u003cli\u003e\u003cspan style=\"color:\" rgb\u003e\u003cfont size=\"2\" face=\"Verdana\" arial helvetica sans-serif\u003eMarine grade plywood construction\u003c\/font\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003cbr\u003e\u003ch3\u003eSpecifications\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/h3\u003e\u003ctable class=\"prod_specs_table_outside_border\" width=\"700\" border=\"0\" cellspacing=\"0\" cellpadding=\"1\"\u003e \u003ctbody align=\"left\"\u003e \u003ctr\u003e \u003ctd\u003e \u003ctable class=\"prod_specs_table\" width=\"100%\" border=\"0\" cellspacing=\"1\" cellpadding=\"2\"\u003e \u003ctbody align=\"left\"\u003e \u003ctr\u003e\n\u003cth bgcolor=\"#cccccc\" width=\"31%\" height=\"5\"\u003e \u003cdiv align=\"left\"\u003eSPECIFICATIONS\u003c\/div\u003e \u003c\/th\u003e\n\u003cth bgcolor=\"#cccccc\" height=\"5\"\u003eAD-S28Tw\u003c\/th\u003e\n\u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eConfiguration\u003c\/td\u003e \u003ctd\u003eSurface mount bandpass subwoofer, ported\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eLow-frequency transducer\u003c\/td\u003e \u003ctd valign=\"top\"\u003eDual 8\" (200 mm) weather resistant, polypropylene cone woofers, rubber surround\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eFrequency range \u003csup\u003e1\u003c\/sup\u003e\u003cbr\u003e Frequency response (-6 dB)\u003cbr\u003e Useable frequency range (-10 dB)\u003c\/td\u003e \u003ctd\u003e\n\u003cbr\u003e42 to 165 Hz\u003cbr\u003e36 to 205 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eFilter\u003c\/td\u003e \u003ctd\u003e120 Hz low-pass, passive, bypassable\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eMaximum output \u003csup\u003e2\u003c\/sup\u003e\u003cbr\u003e Calculated peak \/ continuous Output\u003cbr\u003e 2 pi (half space)\u003cbr\u003e 4 pi (full space)\u003c\/td\u003e \u003ctd\u003e\n\u003cbr\u003e\u003cbr\u003e124 dB SPL \/ 118 dB SPL\u003cbr\u003e118 dB SPL \/ 112 dB SPL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eNominal impedance\u003c\/td\u003e \u003ctd valign=\"top\"\u003e8 ohms\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003ePower rating\u003cbr\u003eContinuous power handling\u003csup\u003e3\u003c\/sup\u003e\u003cbr\u003eRecommended max amp power\u003c\/td\u003e \u003ctd valign=\"top\"\u003e\n\u003cbr\u003e250 W (2 hours IEC)\u003cbr\u003e500 W (loudspeaker \"program\" power)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eSensitivity\u003c\/td\u003e \u003ctd\u003e94 dB, 2.83 V at 1 m, half space (2 pi)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" colspan=\"2\"\u003e\u003cstrong\u003eTransformers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"prod_specs_table_gray\" style=\"display: none;\" io-table-normalizer=\"\"\u003e\u003cstrong\u003eTransformers\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eType\u003c\/td\u003e \u003ctd\u003eCustom low distortion laminated core, wide bandwidth design\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eTaps\u003c\/td\u003e \u003ctd\u003e70V: 200, 100, 50, 25 W; 8? bypass\u003cbr\u003e100V: 200, 100, 50 W; 8? bypass\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" colspan=\"2\"\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"prod_specs_table_gray\" style=\"display: none;\" io-table-normalizer=\"\"\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eMaterial\u003c\/td\u003e \u003ctd\u003eMarine grade plywood, ABS, steel grille\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eEnvironmental\u003c\/td\u003e \u003ctd\u003eExceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X4 splash rating\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eFinish\u003c\/td\u003e \u003ctd\u003eTextured black paint\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\"\u003eGrille\u003c\/td\u003e \u003ctd\u003ePainted steel\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eConnectors\u003c\/td\u003e \u003ctd\u003eFour-position barrier strip; 2 in \/ 2 out\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eMounting Hardware\u003c\/td\u003e \u003ctd\u003eBlack powder coated steel yoke with attachment hardware\u003cbr\u003eBlack zinc coated forged shoulder steel M6 eyebolts\u003cbr\u003eBlack powder coated steel shear plates with attachment hardware\u003cbr\u003eBlack rubber feet with integral threaded bolt\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"prod_specs_table_gray\" valign=\"top\"\u003eWeight\u003c\/td\u003e \u003ctd\u003e43 lb (19.5 kg) \/ 55 lb (25 kg)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e","brand":"QSC","offers":[{"title":"Default Title","offer_id":43895021797419,"sku":"QSC-AD-S28TW-BK","price":587.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/thumb_1530__37917.1682443148.1280.1280.jpg?v=1775683532","url":"https:\/\/www.empirepro.com\/products\/qsc-ad-s28tw-bk","provider":"Empire Pro","version":"1.0","type":"link"}