{"id":10771,"date":"2025-05-07T15:40:51","date_gmt":"2025-05-07T13:40:51","guid":{"rendered":"https:\/\/www.creativ.net.pl\/?post_type=product&#038;p=10771"},"modified":"2026-04-03T11:28:43","modified_gmt":"2026-04-03T09:28:43","slug":"subwoofer-audio-control-spk-8s2","status":"publish","type":"product","link":"https:\/\/www.creativ.net.pl\/en\/product\/subwoofer-audio-control-spk-8s2\/","title":{"rendered":"Audio Control SPK-8S4 subwoofer"},"content":{"rendered":"<p>8\u2033 Subwoofer of the SPIKE series.  Single, 4-ohm high efficiency.<\/p>\n<p class=\"\" data-start=\"46\" data-end=\"59\"><strong data-start=\"46\" data-end=\"57\">FEATURES<\/strong><\/p>\n<ul data-start=\"60\" data-end=\"456\">\n<li class=\"\" data-start=\"60\" data-end=\"118\">\n<p class=\"\" data-start=\"62\" data-end=\"118\">High tilt design for ultra-low frequencies<\/p>\n<\/li>\n<li class=\"\" data-start=\"119\" data-end=\"170\">\n<p class=\"\" data-start=\"121\" data-end=\"170\">Mica-coated paper fibre membrane<\/p>\n<\/li>\n<li class=\"\" data-start=\"171\" data-end=\"234\">\n<p class=\"\" data-start=\"173\" data-end=\"234\">Three-layer coil casing with high thermal resistance<\/p>\n<\/li>\n<li class=\"\" data-start=\"235\" data-end=\"294\">\n<p class=\"\" data-start=\"237\" data-end=\"294\">Dual damping system for linear bass reproduction<\/p>\n<\/li>\n<li class=\"\" data-start=\"295\" data-end=\"370\">\n<p class=\"\" data-start=\"297\" data-end=\"370\">Double dust cover system for housing pressure control<\/p>\n<\/li>\n<li class=\"\" data-start=\"371\" data-end=\"412\">\n<p class=\"\" data-start=\"373\" data-end=\"412\">Efficient, robust magnetic system<\/p>\n<\/li>\n<li class=\"\" data-start=\"413\" data-end=\"456\">\n<p class=\"\" data-start=\"415\" data-end=\"456\">Removable subwoofer cover included<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"1197\" data-end=\"1244\"><strong data-start=\"1197\" data-end=\"1213\">SPECIFICATIONS \/<\/strong><strong data-start=\"1216\" data-end=\"1242\">PARAMETERS\u00a0<\/strong><\/p>\n<ul data-start=\"1245\" data-end=\"1975\">\n<li class=\"\" data-start=\"1245\" data-end=\"1281\">\n<p class=\"\" data-start=\"1247\" data-end=\"1281\">Nominal impedance (Z): 4 ohms<\/p>\n<\/li>\n<li class=\"\" data-start=\"1282\" data-end=\"1315\">\n<p class=\"\" data-start=\"1284\" data-end=\"1315\">DC resistance (Re): 3.2 ohms<\/p>\n<\/li>\n<li class=\"\" data-start=\"1316\" data-end=\"1362\">\n<p class=\"\" data-start=\"1318\" data-end=\"1362\">Resonant frequency (Fs): 60.3665 Hz<\/p>\n<\/li>\n<li class=\"\" data-start=\"1363\" data-end=\"1401\">\n<p class=\"\" data-start=\"1365\" data-end=\"1401\">Piston area (Sd): 0,0194 m\u00b2<\/p>\n<\/li>\n<li class=\"\" data-start=\"1402\" data-end=\"1435\">\n<p class=\"\" data-start=\"1404\" data-end=\"1435\">Driving force (BL): 11.3310 T-m<\/p>\n<\/li>\n<li class=\"\" data-start=\"1436\" data-end=\"1480\">\n<p class=\"\" data-start=\"1438\" data-end=\"1480\">Mechanical Q-factor (Qms): 5,4933<\/p>\n<\/li>\n<li class=\"\" data-start=\"1481\" data-end=\"1525\">\n<p class=\"\" data-start=\"1483\" data-end=\"1525\">Electric Q factor (Qes): 0,8733<\/p>\n<\/li>\n<li class=\"\" data-start=\"1526\" data-end=\"1568\">\n<p class=\"\" data-start=\"1528\" data-end=\"1568\">Total Q factor (Qts): 0,7535<\/p>\n<\/li>\n<li class=\"\" data-start=\"1569\" data-end=\"1603\">\n<p class=\"\" data-start=\"1571\" data-end=\"1603\">1W\/M sensitivity (SPL): 81.9876 dB<\/p>\n<\/li>\n<li class=\"\" data-start=\"1604\" data-end=\"1648\">\n<p class=\"\" data-start=\"1606\" data-end=\"1648\">Mechanical susceptibility (Cms): 0.0752 mm\/N<\/p>\n<\/li>\n<li class=\"\" data-start=\"1649\" data-end=\"1682\">\n<p class=\"\" data-start=\"1651\" data-end=\"1682\">Mobile mass (Mms): 92,3784 g<\/p>\n<\/li>\n<li class=\"\" data-start=\"1683\" data-end=\"1720\">\n<p class=\"\" data-start=\"1685\" data-end=\"1720\">Linear swing (Xmax): 8.5 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"1721\" data-end=\"1788\">\n<p class=\"\" data-start=\"1723\" data-end=\"1788\">Acoustic compensation volume (Vas): 3.9378 l \/ 0.1390 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"1789\" data-end=\"1830\">\n<p class=\"\" data-start=\"1791\" data-end=\"1830\">Reference efficiency (NO.): 0.0952%<\/p>\n<\/li>\n<li class=\"\" data-start=\"1831\" data-end=\"1858\">\n<p class=\"\" data-start=\"1833\" data-end=\"1858\">RMS power (Pe): 350 watts<\/p>\n<\/li>\n<li class=\"\" data-start=\"1859\" data-end=\"1892\">\n<p class=\"\" data-start=\"1861\" data-end=\"1892\">Frequency response: 30-500 Hz<\/p>\n<\/li>\n<li class=\"\" data-start=\"1893\" data-end=\"1931\">\n<p class=\"\" data-start=\"1895\" data-end=\"1931\">Coil diameter: 2.0 inch \/ 50.8 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"1932\" data-end=\"1975\">\n<p class=\"\" data-start=\"1934\" data-end=\"1975\">Displacement volume: 0.05 ft\u00b3 \/ 1.44 l<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"2047\" data-end=\"2060\"><strong data-start=\"2047\" data-end=\"2058\">DIMENSIONS<\/strong><\/p>\n<ul data-start=\"2061\" data-end=\"2380\">\n<li class=\"\" data-start=\"2061\" data-end=\"2119\">\n<p class=\"\" data-start=\"2063\" data-end=\"2119\">Dimensions: 23.00\u2033 (W) \u00d7 11.50\u2033 (H) \u00d7 12.00\u2033 (D)<\/p>\n<\/li>\n<li class=\"\" data-start=\"2120\" data-end=\"2171\">\n<p class=\"\" data-start=\"2122\" data-end=\"2171\">Mounting hole diameter: 7.25 inches \/ 184 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"2172\" data-end=\"2216\">\n<p class=\"\" data-start=\"2174\" data-end=\"2216\">Mounting depth: 4.291 in \/ 109 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"2217\" data-end=\"2273\">\n<p class=\"\" data-start=\"2219\" data-end=\"2273\">Mounting height (without bezel): 0.55 in \/ 14 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"2274\" data-end=\"2328\">\n<p class=\"\" data-start=\"2276\" data-end=\"2328\">Mounting height (with bezel): 1.18 inches \/ 30 mm<\/p>\n<\/li>\n<li class=\"\" data-start=\"2329\" data-end=\"2380\">\n<p class=\"\" data-start=\"2331\" data-end=\"2380\">Motor diameter (with guard): 5.55 in \/ 141 mm<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"2387\" data-end=\"2423\"><strong data-start=\"2387\" data-end=\"2421\">BASS-REFLEX HOUSING (WITH PORT)<\/strong><\/p>\n<ul data-start=\"2424\" data-end=\"2790\">\n<li class=\"\" data-start=\"2424\" data-end=\"2472\">\n<p class=\"\" data-start=\"2426\" data-end=\"2472\">External dimensions: 23.00\u2033 \u00d7 11.50\u2033 \u00d7 12.00\u2033<\/p>\n<\/li>\n<li class=\"\" data-start=\"2473\" data-end=\"2514\">\n<p class=\"\" data-start=\"2475\" data-end=\"2514\">Net internal volume: 0.89 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"2515\" data-end=\"2560\">\n<p class=\"\" data-start=\"2517\" data-end=\"2560\">Total internal volume: 1.22 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"2561\" data-end=\"2603\">\n<p class=\"\" data-start=\"2563\" data-end=\"2603\">Gross external volume: 1.84 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"2604\" data-end=\"2632\">\n<p class=\"\" data-start=\"2606\" data-end=\"2632\">Material thickness: 0.75\u2033<\/p>\n<\/li>\n<li class=\"\" data-start=\"2633\" data-end=\"2667\">\n<p class=\"\" data-start=\"2635\" data-end=\"2667\">Tuning frequency: 40 Hz<\/p>\n<\/li>\n<li class=\"\" data-start=\"2668\" data-end=\"2702\">\n<p class=\"\" data-start=\"2670\" data-end=\"2702\">Port area: 17.50 cal\u00b2<\/p>\n<\/li>\n<li class=\"\" data-start=\"2703\" data-end=\"2748\">\n<p class=\"\" data-start=\"2705\" data-end=\"2748\">Port inlet: 1.75\u2033 (W) \u00d7 10.00\u2033 (H)<\/p>\n<\/li>\n<li class=\"\" data-start=\"2749\" data-end=\"2774\">\n<p class=\"\" data-start=\"2751\" data-end=\"2774\">Port length: 28,00\u2033<\/p>\n<\/li>\n<li class=\"\" data-start=\"2775\" data-end=\"2790\">\n<p class=\"\" data-start=\"2777\" data-end=\"2790\">F3 (Hz): 34<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"2797\" data-end=\"2829\"><strong data-start=\"2797\" data-end=\"2827\">SEALED ENCLOSURE<\/strong><\/p>\n<ul data-start=\"2830\" data-end=\"3071\">\n<li class=\"\" data-start=\"2830\" data-end=\"2878\">\n<p class=\"\" data-start=\"2832\" data-end=\"2878\">External dimensions: 14.50\u2033 \u00d7 10.00\u2033 \u00d7 10.00\u2033<\/p>\n<\/li>\n<li class=\"\" data-start=\"2879\" data-end=\"2920\">\n<p class=\"\" data-start=\"2881\" data-end=\"2920\">Net internal volume: 0.49 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"2921\" data-end=\"2966\">\n<p class=\"\" data-start=\"2923\" data-end=\"2966\">Total internal volume: 0.54 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"2967\" data-end=\"3009\">\n<p class=\"\" data-start=\"2969\" data-end=\"3009\">Gross external volume: 0.84 ft\u00b3<\/p>\n<\/li>\n<li class=\"\" data-start=\"3010\" data-end=\"3038\">\n<p class=\"\" data-start=\"3012\" data-end=\"3038\">Material thickness: 0.75\u2033<\/p>\n<\/li>\n<li class=\"\" data-start=\"3039\" data-end=\"3057\">\n<p class=\"\" data-start=\"3041\" data-end=\"3057\">F3 (Hz): 69,04<\/p>\n<\/li>\n<li class=\"\" data-start=\"3058\" data-end=\"3071\">\n<p class=\"\" data-start=\"3060\" data-end=\"3071\">Qtc: 0,86<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"3073\" data-end=\"3150\">*Recommended enclosure sizes do not take into account speaker and\/or port displacement<\/p>","protected":false},"excerpt":{"rendered":"<p>8&#8243; Subwoofer serii SPIKE.\u00a0 Pojedynczy, 4-ohmowy o wysokiej wydajno\u015bci. FUNKCJE Konstrukcja o du\u017cym wychyleniu dla ultra niskich ton\u00f3w Membrana z w\u0142\u00f3kien papierowych z pow\u0142ok\u0105 z miki Tr\u00f3jwarstwowy karkas cewki o wysokiej odporno\u015bci termicznej Podw\u00f3jny system t\u0142umienia dla liniowej reprodukcji basu Podw\u00f3jny system os\u0142ony przeciwpy\u0142owej dla kontroli ci\u015bnienia w obudowie Wydajny, wytrzyma\u0142y uk\u0142ad magnetyczny Zdejmowana os\u0142ona&#8230;<\/p>","protected":false},"featured_media":10776,"template":"","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[121],"product_tag":[],"class_list":{"0":"post-10771","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-subwoofery","8":"first","9":"instock","10":"taxable","11":"shipping-taxable","12":"product-type-simple","13":"entry","14":"content-bg","15":"loop-entry"},"acf":[],"taxonomy_info":{"product_cat":[{"value":121,"label":"Subwoofery"}]},"featured_image_src_large":["https:\/\/www.creativ.net.pl\/wp-content\/uploads\/2025\/05\/spk-8s-left-1024x448.jpg",1024,448,true],"author_info":[],"comment_info":"","_links":{"self":[{"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/product\/10771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/media\/10776"}],"wp:attachment":[{"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/media?parent=10771"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/product_brand?post=10771"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/product_cat?post=10771"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.creativ.net.pl\/en\/wp-json\/wp\/v2\/product_tag?post=10771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}