{"id":485,"date":"2026-02-11T09:44:45","date_gmt":"2026-02-11T09:44:45","guid":{"rendered":"https:\/\/zsoundpro.com\/?p=485"},"modified":"2026-08-01T08:32:50","modified_gmt":"2026-08-01T08:32:50","slug":"21-inch-pro-audio-subwoofer-ls21","status":"publish","type":"post","link":"https:\/\/zsoundpro.com\/fr\/21-inch-pro-audio-subwoofer-ls21\/","title":{"rendered":"LS21 21 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 size-full\"><img decoding=\"async\" width=\"1000\" height=\"800\" data-src=\"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe.jpg\" alt=\"21-Inch Pro Audio Subwoofer\" class=\"wp-image-1630 lazyload\" data-srcset=\"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe.jpg 1000w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe-300x240.jpg 300w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe-768x614.jpg 768w, https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe-15x12.jpg 15w\" data-sizes=\"(max-width: 1000px) 100vw, 1000px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1000px; --smush-placeholder-aspect-ratio: 1000\/800;\" \/><\/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=\"21-inch-pro-audio-subwoofer\">21-Inch Pro Audio Subwoofer<\/h2>\n\n\n<h2 style=\"line-height:1.7;\" class=\"wp-block-post-title has-medium-font-size\">LS21 21 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>Middle and large touring performance<\/li>\n\n\n\n<li>Stadium<\/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>Neodymium high-sensitivity driver, maximum headroom<\/li>\n\n\n\n<li>High-power output cabinet<\/li>\n\n\n\n<li>Ultra-low frequency limiting<\/li>\n\n\n\n<li>Multiple ergonomic handles on each side<\/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>25 Hz-250 Hz (\u00b13 dB)<\/td><\/tr><tr><td>NOMINAL COVERAGE (\u00b16dB)<\/td><td>Omnidirectional<\/td><\/tr><tr><td>SENSITIVITY (@1w\/1m)<\/td><td>98 dB SPL<\/td><\/tr><tr><td>POWER RATING (AES)<\/td><td>1200W (AES)<\/td><\/tr><tr><td>NOMINAL IMPEDANCE<\/td><td>8 ohms<\/td><\/tr><tr><td>MAXIMUM SPL<\/td><td>140 dB SPL peak<\/td><\/tr><tr><td>DRIVERS<\/td><td>1&#215;21\u201d neodymium woofer (135mm voice coil)<\/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>648 x 1100 x 700 mm<\/td><\/tr><tr><td>WEIGHT<\/td><td>100.6 kg \/ 221 lbs<\/td><\/tr><tr><td>CONNECTORS<\/td><td>2 x NL4 connectors<\/td><\/tr><tr><td>SPEAKER CABLES<\/td><td>1+1- \/ 2+2- (N\/C)<\/td><\/tr><tr><td>MATERIALS<\/td><td>15mm, 18mm, 24mm Baltic 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 cloth<\/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 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class=\"wp-block-embed__wrapper\">\n<iframe title=\"ZSOUND LC215 + LS21 line array system\" width=\"500\" height=\"281\" data-src=\"https:\/\/www.youtube.com\/embed\/hT-EZcvJ_Qw?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=\"ZSOUND LA212 dual12&quot; line array and LS21 single 21&quot; subwoofer system\" width=\"500\" height=\"281\" data-src=\"https:\/\/www.youtube.com\/embed\/i0wlKGJ9LNA?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=\"LS21 21inch subwoofer\" width=\"500\" height=\"375\" data-src=\"https:\/\/www.youtube.com\/embed\/PoQDjYbcXmg?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-ls21-unleashing-the-power-of-a-21-inch-pro-audio-subwoofer\">ZSOUND LS21: Unleashing the Power of a 21-Inch Pro Audio Subwoofer<\/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\">When it comes to large-scale events like stadium tours or massive outdoor festivals, the difference between a good show and an unforgettable experience often lies in the &#8220;low-end.&#8221; This is where the ZSOUND LS21, an amazing <strong>21-Inch Pro Audio Subwoofer<\/strong> (a massive loudspeaker unit specifically engineered to reproduce the deepest, most physical bass frequencies), takes center stage. While smaller systems might provide volume, this specific <strong>21-Inch Pro Audio Subwoofer<\/strong> provides the visceral &#8220;thump&#8221; that you feel in your chest, reaching down to an incredible 25 Hz.<\/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\">In the complex architecture of a <a href=\"https:\/\/zsoundpro.com\/professional-subwoofer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Professional Subwoofer<\/a> , the LS21 acts as the foundation. It handles the heavy lifting, allowing the hanging line array modules to focus on the clarity of vocals and instruments while this <strong>21-Inch Pro Audio Subwoofer<\/strong> anchors the entire soundscape with authoritative power.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"neodymium-technology-maximum-headroom-manageable-weight\">Neodymium Technology: Maximum Headroom, Manageable Weight<\/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\">One of the most impressive features of this <strong>21-Inch Pro Audio Subwoofer<\/strong> is its use of a 21-inch Neodymium driver (a speaker component using rare-earth magnets that are significantly stronger and lighter than standard ferrite magnets). By utilizing Neodymium, ZSOUND achieves a sensitivity of 98 dB (a measure of how efficiently the speaker converts amplifier power into actual sound volume) without making the cabinet impossible to transport for touring crews.<\/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\">This driver configuration is equipped with a 135mm voice coil (the internal coil of wire that moves the speaker cone to create sound waves). A larger voice coil allows for better heat dissipation and higher power handling, resulting in a maximum SPL of 140 dB (the peak sound pressure level or volume the speaker can generate). For sound engineers, this means &#8220;maximum headroom&#8221; (the extra safety margin of volume available before the sound starts to crackle or distort), ensuring that even the most dynamic bass drops remain crystal clear through the <strong>21-Inch Pro Audio Subwoofer<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"engineered-for-the-road-baltic-birch-and-polyurea-finish\">Engineered for the Road: Baltic Birch and Polyurea Finish<\/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\">Touring equipment leads a hard life, constantly being loaded in and out of trucks for stadium and touring performances. To protect the sophisticated internal components of the <strong>21-Inch Pro Audio Subwoofer<\/strong>, the LS21 is housed in a cabinet made from high-grade Baltic birch plywood (a dense, multi-layered wood favored for pro audio because it doesn&#8217;t vibrate or add unwanted &#8220;colors&#8221; to the sound). ZSOUND uses a combination of 15mm, 18mm, and 24mm thicknesses to ensure the structure is incredibly rigid and inert.<\/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 finish it off, every LS21 is coated in black polyurea paintings (a specialized, heavy-duty waterproof and scratch-resistant coating that acts like a suit of armor for the wood). This ensures that your investment continues to look professional year after year. When setting up a massive stage, visual presentation is just as vital as sonic performance. That is why we often suggest pairing this <strong>21-Inch Pro Audio Subwoofer<\/strong> with <a href=\"http:\/\/seestar-lighting.com\" target=\"_blank\" rel=\"noreferrer noopener\">vibrant theater lighting options<\/a> to create a truly immersive environment that captivates both the eyes and ears.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"precision-performance-understanding-the-25hz-response\">Precision Performance: Understanding the 25Hz Response<\/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 true mark of a premium <strong>21-Inch Pro Audio Subwoofer<\/strong> is its frequency response (the range of musical pitches the speaker is capable of playing). The LS21 is rated from 25 Hz to 250 Hz (\u00b1 3 dB). In the world of audio, 25 Hz is the territory of sub-bass (notes so low they are often felt as a physical vibration rather than heard as a clear tone). For stadium performances, this extreme low-frequency extension is what provides the scale and &#8220;gravity&#8221; needed for modern music genres.<\/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 manage this immense power, the LS21 features multiple ergonomic handles (handles strategically placed on each side for balanced lifting by two or more people) and a rugged black epoxy mesh grille with acoustically reticulated cloth (a protective metal screen and fabric designed to let sound pass through freely while shielding the cone). Whether you are ground-stacking these units at the front of a stage or integrating them into a massive touring rig, this <strong>21-Inch Pro Audio Subwoofer<\/strong> is designed to be the heartbeat of your sound system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"why-choose-the-ls21-for-your-next-stadium-event\">Why Choose the LS21 for Your Next Stadium Event?<\/h2>\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>Extreme Low-End<\/strong>: Reaching down to 25Hz ensures your audience feels every nuance of the performance.<\/li>\n\n\n\n<li><strong>High Output Cabinet<\/strong>: Optimized internal architecture allows for a massive 140 dB peak output.<\/li>\n\n\n\n<li><strong>Pro Power Handling<\/strong>: The 1200W AES power rating (the standard measurement of continuous power handling) ensures sustained performance during long shows.<\/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\">Investing in a high-performance <strong>21-Inch Pro Audio Subwoofer<\/strong> like the LS21 means choosing reliability and physical impact for your most demanding applications. Ready to feel the power? Explore our technical specifications and find the perfect match for your venue today!<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-x-large-font-size\" id=\"faq-about-ls21-subwoofer\">FAQ about LS21 Subwoofer<\/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\"><strong>Q: Can I fly the LS21 alongside my line array?<\/strong> A: While the LS21 is primarily designed for ground-stacking due to its massive size, ZSOUND offers other flyable subwoofers for integrated hanging systems.<\/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\"><strong>Q: What kind of amplifier do I need for this 21-inch subwoofer?<\/strong> A: We recommend using high-power digital amplifiers like the ZSOUND MA series, which provides the necessary current to drive the 135mm voice coil efficiently.<\/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\"><strong>Q: Is the cabinet waterproof?<\/strong> A: The black polyurea finish provides excellent protection against moisture and scratches, making it suitable for outdoor use under standard touring conditions. for your most demanding applications. Ready to feel the power? Explore our technical specifications and find the perfect match for your venue today! LS21 means choosing reliability and physical impact for your most demanding applications. Ready to feel the power? Explore our technical specifications and find the perfect match for your venue today!<\/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=\"#21-inch-pro-audio-subwoofer\">21-Inch Pro Audio Subwoofer<\/a><\/li><li><a href=\"#applications\">Applications<\/a><\/li><li><a href=\"#feature\">Feature<\/a><\/li><li><a href=\"#neodymium-technology-maximum-headroom-manageable-weight\">Neodymium Technology: Maximum Headroom, Manageable Weight<\/a><\/li><li><a href=\"#engineered-for-the-road-baltic-birch-and-polyurea-finish\">Engineered for the Road: Baltic Birch and Polyurea Finish<\/a><\/li><li><a href=\"#precision-performance-understanding-the-25hz-response\">Precision Performance: Understanding the 25Hz Response<\/a><\/li><li><a href=\"#why-choose-the-ls21-for-your-next-stadium-event\">Why Choose the LS21 for Your Next Stadium Event?<\/a><\/li><li><a href=\"#faq-about-ls21-subwoofer\">FAQ about LS21 Subwoofer<\/a><\/li><\/ul><\/nav><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>21-Inch Pro Audio Subwoofer Applications Feature Technical Specification Parameter Name Parameter Value FREQUENCY RESPONSE 25 Hz-250 Hz (\u00b13 dB) NOMINAL COVERAGE (\u00b16dB) Omnidirectional SENSITIVITY (@1w\/1m) 98 dB SPL POWER RATING (AES) 1200W (AES) NOMINAL IMPEDANCE 8 ohms MAXIMUM SPL 140 dB SPL peak DRIVERS 1&#215;21\u201d neodymium woofer (135mm voice coil) Physical Data Parameter Name Parameter [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":486,"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-485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pro_audio","category-subwoofer"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/zsoundpro.com\/wp-content\/uploads\/2026\/02\/LS21-\u4e3b\u56fe-1.jpg","_links":{"self":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/485","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=485"}],"version-history":[{"count":9,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/485\/revisions"}],"predecessor-version":[{"id":2706,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/posts\/485\/revisions\/2706"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/media\/486"}],"wp:attachment":[{"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/media?parent=485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/categories?post=485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zsoundpro.com\/fr\/wp-json\/wp\/v2\/tags?post=485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}