{"id":465,"date":"2026-02-05T03:04:24","date_gmt":"2026-02-05T03:04:24","guid":{"rendered":"https:\/\/zsoundpro.com\/?p=465"},"modified":"2026-08-01T08:28:27","modified_gmt":"2026-08-01T08:28:27","slug":"dual-18-inch-passive-subwoofer","status":"publish","type":"post","link":"https:\/\/zsoundpro.com\/fr\/dual-18-inch-passive-subwoofer\/","title":{"rendered":"S28 Dual 18 inch subwoofer"},"content":{"rendered":"\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-139db5b\" data-block-id=\"139db5b\"><style>.stk-139db5b .stk--block-align-139db5b{align-items:center !important;}.stk-139db5b {padding-top:var(--stk--preset--spacing--none, 0px) !important;padding-right:var(--stk--preset--spacing--none, 0px) !important;padding-bottom:var(--stk--preset--spacing--none, 0px) !important;padding-left:var(--stk--preset--spacing--none, 0px) !important;margin-top:var(--stk--preset--spacing--none, 0px) !important;margin-right:var(--stk--preset--spacing--none, 0px) !important;margin-bottom:var(--stk--preset--spacing--none, 0px) !important;margin-left:var(--stk--preset--spacing--none, 0px) !important;}.stk-139db5b-column{max-width:80% !important;min-width:auto !important;}@media screen and (max-width: 1023px){.stk-139db5b-column{max-width:92vw !important;min-width:auto !important;}}@media screen and (max-width: 767px){.stk-139db5b {max-width:100% !important;min-width:auto !important;padding-top:var(--stk--preset--spacing--none, 0px) !important;padding-right:var(--stk--preset--spacing--none, 0px) !important;padding-bottom:var(--stk--preset--spacing--none, 0px) !important;padding-left:var(--stk--preset--spacing--none, 0px) !important;margin-top:var(--stk--preset--spacing--none, 0px) !important;margin-right:var(--stk--preset--spacing--none, 0px) !important;margin-bottom:var(--stk--preset--spacing--none, 0px) !important;margin-left:var(--stk--preset--spacing--none, 0px) !important;}.stk-139db5b-column{max-width:100vw !important;min-width:auto !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk--block-align-139db5b stk-block-content stk-content-align stk-139db5b-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ceebefd\" data-v=\"4\" data-block-id=\"ceebefd\"><style>@media screen and (max-width: 1023px){.stk-ceebefd-container{margin-top:2px !important;margin-right:2px !important;margin-bottom:2px !important;margin-left:2px !important;}}@media screen and (max-width: 767px){.stk-ceebefd-container{margin-top:5px !important;margin-right:5px !important;margin-bottom:5px !important;margin-left:5px !important;}.stk-ceebefd {padding-top:var(--stk--preset--spacing--none, 0px) !important;padding-right:var(--stk--preset--spacing--none, 0px) !important;padding-bottom:var(--stk--preset--spacing--none, 0px) !important;padding-left:var(--stk--preset--spacing--none, 0px) !important;margin-top:var(--stk--preset--spacing--none, 0px) !important;margin-right:var(--stk--preset--spacing--none, 0px) !important;margin-bottom:var(--stk--preset--spacing--none, 0px) !important;margin-left:var(--stk--preset--spacing--none, 0px) !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ceebefd-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ceebefd-inner-blocks\">\n<figure class=\"wp-block-image aligncenter size-full has-custom-border entry-content alignwide\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0\"><img decoding=\"async\" width=\"1200\" height=\"848\" data-src=\"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d.jpg\" alt=\"Dual 18-Inch Passive Subwoofer\" class=\"wp-image-1587 lazyload\" style=\"--smush-placeholder-width: 1200px; --smush-placeholder-aspect-ratio: 1200\/848;border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px\" data-srcset=\"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d.jpg 1200w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d-300x212.jpg 300w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d-1024x724.jpg 1024w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d-768x543.jpg 768w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-Main-pictures-\u62f7\u8d1d-18x12.jpg 18w\" data-sizes=\"(max-width: 1200px) 100vw, 1200px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-bed075c\" data-v=\"4\" data-block-id=\"bed075c\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-bed075c-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-bed075c-inner-blocks\">\n<div class=\"wp-block-group is-layout-flow wp-container-core-group-is-layout-357c23e0 wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"dual-18-inch-passive-subwoofer\">Dual 18-Inch Passive Subwoofer<\/h2>\n\n\n<h2 style=\"line-height:1.7;\" class=\"wp-block-post-title has-medium-font-size\">S28 Dual 18 inch subwoofer<\/h2>\n\n\n<h2 class=\"wp-block-heading has-large-font-size\" id=\"applications\">Applications<\/h2>\n\n\n\n<ul class=\"wp-block-list has-medium-font-size\">\n<li>Touring performance<\/li>\n\n\n\n<li>Club, multi-function hall<\/li>\n\n\n\n<li>Church<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-large-font-size\" id=\"feature\">Feature<\/h2>\n\n\n\n<ul class=\"wp-block-list has-medium-font-size\">\n<li>Vented, horn preposition design<\/li>\n\n\n\n<li>100mm voice coil, high transient response woofer<\/li>\n\n\n\n<li>Thick and elastic hearing<\/li>\n<\/ul>\n<\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-fdee8a2\" data-block-id=\"fdee8a2\"><style>.stk-fdee8a2 {padding-top:0% !important;padding-right:0% !important;padding-bottom:0% !important;padding-left:0% !important;margin-top:var(--stk--preset--spacing--none, 0px) !important;margin-right:var(--stk--preset--spacing--none, 0px) !important;margin-bottom:var(--stk--preset--spacing--none, 0px) !important;margin-left:var(--stk--preset--spacing--none, 0px) !important;}.stk-fdee8a2-column{max-width:80% !important;min-width:auto !important;}@media screen and (max-width: 1023px){.stk-fdee8a2-column{max-width:92vw !important;min-width:auto !important;}}@media screen and (max-width: 767px){.stk-fdee8a2 {max-width:100vw !important;min-width:auto !important;padding-top:var(--stk--preset--spacing--none, 0px) !important;padding-right:var(--stk--preset--spacing--none, 0px) !important;padding-bottom:var(--stk--preset--spacing--none, 0px) !important;padding-left:var(--stk--preset--spacing--none, 0px) !important;margin-top:var(--stk--preset--spacing--none, 0px) !important;}.stk-fdee8a2-column{max-width:100% !important;min-width:auto !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-fdee8a2-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-f02d8ba\" data-v=\"4\" data-block-id=\"f02d8ba\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-f02d8ba-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-f02d8ba-inner-blocks\">\n<h3 class=\"wp-block-heading has-text-align-center\" id=\"technical-specification\">Technical Specification<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table class=\"has-fixed-layout\" style=\"border-style:none;border-width:0px\"><thead><tr><th>Parameter Name<\/th><th>Parameter Value<\/th><\/tr><\/thead><tbody><tr><td>FREQUENCY RESPONSE<\/td><td>32 Hz-180 Hz (\u00b13 dB), 30 Hz-250 Hz (-10 dB)<\/td><\/tr><tr><td>NOMINAL COVERAGE<\/td><td>Omnidirectional<\/td><\/tr><tr><td>SENSITIVITY (\u00b11w\/1m)<\/td><td>102 dB SPL<\/td><\/tr><tr><td>POWER RATING (AES)<\/td><td>1600W<\/td><\/tr><tr><td>NOMINAL IMPEDANCE<\/td><td>8 ohm<\/td><\/tr><tr><td>MAXIMUM SPL<\/td><td>141 dB (peak)<\/td><\/tr><tr><td>DRIVERS<\/td><td>2 x 18&#8243; (100mm voice coil) subwoofer<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-3851903\" data-v=\"4\" data-block-id=\"3851903\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-3851903-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-3851903-inner-blocks\">\n<h3 class=\"wp-block-heading has-text-align-center\" id=\"physical-data\">Physical Data<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-small-font-size\"><table class=\"has-fixed-layout\" style=\"border-style:none;border-width:0px\"><thead><tr><th>Parameter Name<\/th><th>Parameter Value<\/th><\/tr><\/thead><tbody><tr><td>DIMENSIONS (HxWxD)<\/td><td>561 x 1165 x 670 mm<\/td><\/tr><tr><td>WEIGHT<\/td><td>76 kg \/ 168 lbs<\/td><\/tr><tr><td>CONNECTORS<\/td><td>2 x NL4MP Neutrik Speakon connectors<\/td><\/tr><tr><td>SPEAKER CABLES<\/td><td>1+1-<\/td><\/tr><tr><td>MATERIALS<\/td><td>18mm, 24mm birch plywood<\/td><\/tr><tr><td>FINISH<\/td><td>Black polyurea paintings<\/td><\/tr><tr><td>GRILLE<\/td><td>Black epoxy mesh grille with acoustically reticulated foam<\/td><\/tr><tr><td>DIAGRAMS<\/td><td>Front, Side, Top views with dimensions (670, 1165, 561 mm) and Impedance chart provided<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30)\"\/>\n\n\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-9079522\" data-block-id=\"9079522\"><style>.stk-9079522-column{max-width:80% !important;min-width:auto !important;}@media screen and (max-width: 767px){.stk-9079522-column{max-width:100vw !important;min-width:auto !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-9079522-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-e0e8164\" data-v=\"4\" data-block-id=\"e0e8164\"><style>@media screen and (max-width: 767px){.stk-e0e8164-container{margin-top:var(--stk--preset--spacing--20, 10px) !important;margin-right:var(--stk--preset--spacing--20, 10px) !important;margin-bottom:var(--stk--preset--spacing--20, 10px) !important;margin-left:var(--stk--preset--spacing--20, 10px) !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-e0e8164-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-e0e8164-inner-blocks\">\n<div class=\"wp-block-stackable-carousel stk-block-carousel stk--is-slide stk--arrows-justify-space-between stk--arrows-align-center stk-block stk-17932ff\" data-slides-to-show=\"2.2\" data-block-id=\"17932ff\"><style>.stk-17932ff {--slides-to-show:2.2 !important;}@media screen and (max-width: 767px){.stk-17932ff {--slides-to-show:1.2 !important;--gap:8px !important;}}<\/style><div class=\"stk-block-carousel__content-wrapper\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-block-carousel__slider-wrapper stk-content-align stk-17932ff-column\"><div class=\"stk-block-carousel__slider\" role=\"list\" data-autoplay=\"4000\" data-label-slide-of=\"Slide %%d of %%d\" tabindex=\"0\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-44eaaf2\" data-v=\"4\" data-block-id=\"44eaaf2\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-44eaaf2-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-44eaaf2-inner-blocks\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"S28 dual 18 inch subwoofer speaker\" width=\"500\" height=\"281\" data-src=\"https:\/\/www.youtube.com\/embed\/GH6nCiNkibk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-6a5ab22\" data-v=\"4\" data-block-id=\"6a5ab22\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-6a5ab22-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-6a5ab22-inner-blocks\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"The most eye-catching giant in the busy production workshop - SW28\" width=\"500\" height=\"281\" data-src=\"https:\/\/www.youtube.com\/embed\/cw_RvKhCqzA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ff137f4\" data-v=\"4\" data-block-id=\"ff137f4\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ff137f4-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ff137f4-inner-blocks\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"LA210 S28 line array speaker and subwoofer system\" width=\"500\" height=\"281\" data-src=\"https:\/\/www.youtube.com\/embed\/W91GlacrpFI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n<\/div><\/div><\/div>\n<\/div><div class=\"stk-block-carousel__buttons\"><button class=\"stk-block-carousel__button stk-block-carousel__button__prev\" aria-label=\"Previous slide\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"chevron-left\" class=\"svg-inline--fa fa-chevron-left\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 320 512\" width=\"32\" height=\"32\"><path d=\"M34.52 239.03L228.87 44.69c9.37-9.37 24.57-9.37 33.94 0l22.67 22.67c9.36 9.36 9.37 24.52.04 33.9L131.49 256l154.02 154.75c9.34 9.38 9.32 24.54-.04 33.9l-22.67 22.67c-9.37 9.37-24.57 9.37-33.94 0L34.52 272.97c-9.37-9.37-9.37-24.57 0-33.94z\"><\/path><\/svg><\/button><button class=\"stk-block-carousel__button stk-block-carousel__button__next\" aria-label=\"Next slide\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"fas\" data-icon=\"chevron-right\" class=\"svg-inline--fa fa-chevron-right\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 320 512\" width=\"32\" height=\"32\"><path d=\"M285.476 272.971L91.132 467.314c-9.373 9.373-24.569 9.373-33.941 0l-22.667-22.667c-9.357-9.357-9.375-24.522-.04-33.901L188.505 256 34.484 101.255c-9.335-9.379-9.317-24.544.04-33.901l22.667-22.667c9.373-9.373 24.569-9.373 33.941 0L285.475 239.03c9.373 9.372 9.373 24.568.001 33.941z\"><\/path><\/svg><\/button><\/div><\/div><div class=\"stk-block-carousel__dots\" role=\"list\" data-label=\"Slide %%d\"><\/div><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30)\"\/>\n\n\n\n<div class=\"wp-block-stackable-tabs stk-block-tabs stk-block stk-04357de\" data-initial-tab=\"1\" data-block-id=\"04357de\"><style>.stk-04357de .stk-block-tab-content .stk-block-content .stk-block-column[hidden]{display:none !important;}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-block-tabs--horizontal stk-block-tabs--fade stk-content-align stk-04357de-column\">\n<div class=\"wp-block-stackable-tab-labels stk-block-tab-labels stk-block stk-cf8b7da stk-block-background is-style-centered-pills\" data-block-id=\"cf8b7da\"><style>.stk-cf8b7da .stk-block-tabs__tab{color:#999999 !important;padding-top:8px !important;padding-right:24px !important;padding-bottom:8px !important;padding-left:24px !important;border-top-left-radius:50px !important;border-top-right-radius:50px !important;border-bottom-right-radius:50px !important;border-bottom-left-radius:50px !important;}.stk-cf8b7da .stk-block-tabs__tab.stk-block-tabs__tab--active .stk-block-tab-labels__text{color:#ffffff !important;}.stk-cf8b7da {border-top-left-radius:var(--stk--preset--border-radius--full, 9999px) !important;border-top-right-radius:var(--stk--preset--border-radius--full, 9999px) !important;border-bottom-right-radius:var(--stk--preset--border-radius--full, 9999px) !important;border-bottom-left-radius:var(--stk--preset--border-radius--full, 9999px) !important;overflow:hidden !important;padding-top:8px !important;padding-right:8px !important;padding-bottom:8px !important;padding-left:8px !important;margin-right:auto !important;margin-left:auto !important;}.stk-cf8b7da .stk-block-tab-labels__text{font-size:var(--stk--preset--font-size--medium, 1rem) !important;color:#999999 !important;}.stk-cf8b7da .stk-block-tabs__tab:not(.stk-block-tabs__tab--active):hover{background:#dddddd !important;opacity:1 !important;}.stk-cf8b7da .stk-block-tabs__tab .stk--inner-svg svg:last-child, .stk-cf8b7da .stk-block-tabs__tab .stk--inner-svg svg:last-child :is(g, path, rect, polygon, ellipse){fill:#777777 !important;}.stk-cf8b7da .stk-block-tabs__tab:not(.stk-block-tabs__tab--active):hover .stk--inner-svg svg:last-child, .stk-cf8b7da .stk-block-tabs__tab:not(.stk-block-tabs__tab--active):hover .stk--inner-svg svg:last-child :is(g, path, rect, polygon, ellipse){fill:#000000 !important;}.stk-cf8b7da .stk-block-tabs__tab.stk-block-tabs__tab--active{background:#000000 !important;border-style:solid !important;border-top-width:0px !important;border-right-width:0px !important;border-bottom-width:0px !important;border-left-width:0px !important;}.stk-cf8b7da .stk-block-tabs__tab.stk-block-tabs__tab--active .stk--inner-svg svg:last-child, .stk-cf8b7da .stk-block-tabs__tab.stk-block-tabs__tab--active .stk--inner-svg svg:last-child :is(g, path, rect, polygon, ellipse){fill:#ffffff !important;}@media screen and (max-width: 1023px){.stk-cf8b7da .stk-block-tab-labels__text{font-size:var(--stk--preset--font-size--medium, 1rem) !important;}}<\/style><div class=\"stk-block-tab-labels__wrapper\" role=\"tablist\"><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>Product Introduction<\/span><\/div><\/button><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>Installation<\/span><\/div><\/button><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>Product Matching<\/span><\/div><\/button><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>Cases<\/span><\/div><\/button><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>Download<\/span><\/div><\/button><button class=\"stk-block-tabs__tab\" role=\"tab\"><div class=\"stk-block-tab-labels__text\"><span>More Pic\/Video<\/span><\/div><\/button><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-tab-content stk-block-tab-content stk-block stk-a205f45\" data-block-id=\"a205f45\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-a205f45-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-434e98c\" data-v=\"4\" role=\"tabpanel\" data-block-id=\"434e98c\"><style>.stk-434e98c-container{margin-top:var(--stk--preset--spacing--none, 0px) !important;margin-right:var(--stk--preset--spacing--none, 0px) !important;margin-bottom:var(--stk--preset--spacing--none, 0px) !important;margin-left:var(--stk--preset--spacing--none, 0px) !important;}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-434e98c-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-434e98c-inner-blocks\">\n<div class=\"wp-block-group has-small-font-size is-layout-flow wp-container-core-group-is-layout-e356762d wp-block-group-is-layout-flow\" style=\"border-style:none;border-width:0px;margin-top:0;margin-bottom:0\">\n<h1 class=\"wp-block-heading\" id=\"zsound-s-28-the-ultimate-dual-18-inch-passive-subwoofer-for-large-scale-events\">ZSOUND S28: The Ultimate Dual 18-Inch Passive Subwoofer for Large-Scale Events<\/h1>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">In the architecture of professional sound reinforcement, the lowest frequencies provide the physical foundation that moves an audience. The ZSOUND S28 is designed to be the &#8220;heavy artillery&#8221; of this foundation. As a high-output <strong>Dual 18-Inch Passive Subwoofer<\/strong> (a non-powered loudspeaker cabinet containing two 18-inch drivers that requires an external power amplifier to function), the S28 is engineered to deliver the visceral, floor-shaking energy required for stadiums, large festivals, and premier nightclubs.<\/p>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">When integrated into a complete system, this subwoofer acts as the anchor for our <a href=\"https:\/\/zsoundpro.com\/professional-subwoofer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Professional Subwoofer<\/a> collection, providing the necessary weight and &#8220;thump&#8221; that standard full-range speakers cannot reproduce on their own.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"engineered-for-extreme-pressure-and-clarity\">Engineered for Extreme Pressure and Clarity<\/h2>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">The soul of the S28 lies in its two massive 18-inch woofers, each equipped with a 100mm voice coil (the coil of wire that reacts to magnetic fields to move the speaker cone). This specialized design allows the <strong>Dual 18-Inch Passive Subwoofer<\/strong> to handle a continuous power rating of 1600W AES, reaching a staggering peak SPL (Sound Pressure Level\u2014the scientific measurement of how loud a sound is) of 141 dB.<\/p>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">What makes the S28 unique is its vented, horn-preposition design (a sophisticated cabinet layout where the air from the back of the driver is phased through a tuned port to increase low-end efficiency). This ensures that the bass is not only loud but also incredibly &#8220;fast&#8221; and articulated. Whether you are reproducing the rapid double-kick of a heavy metal drummer or the sustained low-frequency oscillations of a modern synth-bass, the S28 remains precise and distortion-free.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"uncompromising-construction-and-touring-durability\">Uncompromising Construction and Touring Durability<\/h2>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">A professional <strong>Dual 18-Inch Passive Subwoofer<\/strong> must be able to withstand the brutal environment of global touring. To meet this challenge, ZSOUND constructs the S28 cabinet from a combination of 18mm and 24mm Baltic birch plywood (a high-density, multi-layered wood favored by audio professionals for its structural rigidity and natural acoustic properties). This heavy-duty construction prevents &#8220;cabinet flex&#8221; (unwanted vibrations from the wooden box itself that can muddy the sound), ensuring every watt of power is converted into pure acoustic energy.<\/p>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">To protect this investment from the rigors of the road, the S28 is finished in a rugged black polyurea paint (a specialized, plastic-like protective coating that is virtually immune to scratches, moisture, and impact). For large-scale productions that demand both sonic and visual excellence, pairing these subs with <a href=\"http:\/\/seestar-lighting.com\" target=\"_blank\" rel=\"noreferrer noopener\">professional event visual systems<\/a> can turn a simple stage into an immersive, high-energy environment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"versatile-integration-for-professional-audio-systems\">Versatile Integration for Professional Audio Systems<\/h2>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">The S28 is a &#8220;passive&#8221; system, meaning it gives sound engineers the flexibility to choose their own processing and amplification. For optimal performance, we recommend pairing this <strong>Dual 18-Inch Passive Subwoofer<\/strong> with our digital power amplifiers, allowing for precise control over the crossover frequencies (the electronic filter that ensures the subwoofer only receives the deep bass notes while keeping vocals and guitars out).<\/p>\n\n\n\n<ol style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\" class=\"wp-block-list has-large-font-size\">\n<li><strong>Large Stadium Performances<\/strong>: The high-sensitivity rating of 102 dB ensures that the sound carries to the furthest seats without losing its physical impact.<\/li>\n\n\n\n<li><strong>Prestigious House of Worship<\/strong>: Provides a rich, warm low-end that adds solemnity and depth to musical worship and spoken word.<\/li>\n\n\n\n<li><strong>High-Energy Clubs<\/strong>: The dual-driver configuration moves a massive volume of air, creating the &#8220;chest-hit&#8221; sensation that is essential for electronic dance music.<\/li>\n<\/ol>\n\n\n\n<p class=\"has-large-font-size\" style=\"margin-top:var(--wp--preset--spacing--30);margin-bottom:var(--wp--preset--spacing--30);line-height:1.6\">By choosing the ZSOUND S28, you are investing in a <strong>Dual 18-Inch Passive Subwoofer<\/strong> that refuses to compromise on power or precision. It is more than just a speaker; it is a precision-engineered tool designed to make your audience feel the music as much as they hear it.<\/p>\n<\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-rank-math-toc-block aligncenter has-large-font-size\" style=\"padding-top:0;line-height:1.4\" id=\"rank-math-toc\"><h3>Table of Contents<\/h3><nav><ul><li><a href=\"#dual-18-inch-passive-subwoofer\">Dual 18-Inch Passive Subwoofer<\/a><\/li><li><a href=\"#applications\">Applications<\/a><\/li><li><a href=\"#feature\">Feature<\/a><\/li><li><a href=\"#engineered-for-extreme-pressure-and-clarity\">Engineered for Extreme Pressure and Clarity<\/a><\/li><li><a href=\"#uncompromising-construction-and-touring-durability\">Uncompromising Construction and Touring Durability<\/a><\/li><li><a href=\"#versatile-integration-for-professional-audio-systems\">Versatile Integration for Professional Audio Systems<\/a><\/li><\/ul><\/nav><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Dual 18-Inch Passive Subwoofer Applications Feature Technical Specification Parameter Name Parameter Value FREQUENCY RESPONSE 32 Hz-180 Hz (\u00b13 dB), 30 Hz-250 Hz (-10 dB) NOMINAL COVERAGE Omnidirectional SENSITIVITY (\u00b11w\/1m) 102 dB SPL POWER RATING (AES) 1600W NOMINAL IMPEDANCE 8 ohm MAXIMUM SPL 141 dB (peak) DRIVERS 2 x 18&#8243; (100mm voice coil) subwoofer Physical Data [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":466,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[5,16],"tags":[],"class_list":["post-465","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pro_audio","category-subwoofer"],"jetpack_featured_media_url":"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/S28-\u5b98\u7f51\u4e3b\u56fe.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/comments?post=465"}],"version-history":[{"count":7,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/465\/revisions"}],"predecessor-version":[{"id":2704,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/465\/revisions\/2704"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/media\/466"}],"wp:attachment":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/media?parent=465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/categories?post=465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/tags?post=465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}