{"id":1769,"date":"2025-07-05T17:15:25","date_gmt":"2025-07-05T10:15:25","guid":{"rendered":"https:\/\/pltspeaker.com\/?post_type=product&#038;p=1769"},"modified":"2025-07-05T17:15:25","modified_gmt":"2025-07-05T10:15:25","slug":"4-sb12nrx25-8-norex","status":"publish","type":"product","link":"https:\/\/pltspeaker.com\/th\/product\/4-sb12nrx25-8-norex\/","title":{"rendered":"4&#8221; SB12NRX25-8 \/ Norex"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1771\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-DRAWING-500x246-1-300x148.jpg\" alt=\"\" width=\"300\" height=\"148\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-DRAWING-500x246-1-300x148.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-DRAWING-500x246-1-18x9.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-DRAWING-500x246-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1772\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-GRAFIK-500x246-1-300x148.jpg\" alt=\"\" width=\"300\" height=\"148\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-GRAFIK-500x246-1-300x148.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-GRAFIK-500x246-1-18x9.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12NRX25-8-GRAFIK-500x246-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<h2 class=\"yikes-custom-woo-tab-title yikes-custom-woo-tab-title-features\">Features<\/h2>\n<ul>\n<li>Proprietary cone material with natural fibres made in-house<\/li>\n<li>High damping Butyl rubber surround for non-resonant sound character<\/li>\n<li>Vented pole piece for reduced compression<\/li>\n<li>Vented cast aluminium chassis for optimum strength and low compression<\/li>\n<li>CCAW voice coil for reduced moving mass<\/li>\n<li>Long life silver lead wires<\/li>\n<li>Non-conducting fibre glass coil former for minimum damping<\/li>\n<li>Shorting ring in motor system for reduced distortion<\/li>\n<\/ul>\n<h2 class=\"yikes-custom-woo-tab-title yikes-custom-woo-tab-title-specs\">Specs<\/h2>\n<ul>\n<li>Nominal Impedance 8 \u03a9<\/li>\n<li>DC resistance, Re 6.4 \u03a9<\/li>\n<li>Voice coil inductance, Le 0.34 mH<\/li>\n<li>Effective piston area, Sd 50 cm2<\/li>\n<li>Voice coil diameter 25.4 mm<\/li>\n<li>Voice coil height 15 mm<\/li>\n<li>Air gap height 5 mm<\/li>\n<li>Linear coil travel (p-p) 10 mm<\/li>\n<li>Magnetic flux density 1.07 T<\/li>\n<li>Magnet weight 0.40 kg<\/li>\n<li>Net weight 0.92 kg<\/li>\n<li>Free air resonance, Fs 57 Hz<\/li>\n<li>Sensitivity (2.83 V \/ 1 m) 85.5 dB<\/li>\n<li>Mechanical Q-factor, Qms 4.1<\/li>\n<li>Electrical Q-factor, Qes 0.41<\/li>\n<li>Total Q-factor, Qts 0.37<\/li>\n<li>Moving mass incl. air, Mms 5.2 g<\/li>\n<li>Force factor, Bl 5.4 Tm<\/li>\n<li>Equivalent volume, VAS 5.3 liters<\/li>\n<li>Compliance, Cms 1.49 mm\/N<\/li>\n<li>Mechanical loss, Rms 0.45 kg\/s<\/li>\n<li>Rated power handling* 30 W<\/li>\n<\/ul>\n<p>* IEC 268-5, T\/S parameters measured on drive units that are broken in.<\/p>","protected":false},"excerpt":{"rendered":"<p>.<\/p>","protected":false},"featured_media":1770,"template":"","meta":[],"product_brand":[47],"product_cat":[57],"product_tag":[],"class_list":{"0":"post-1769","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-sb-acoustics","7":"product_cat-nrx-midwoofers","9":"first","10":"onbackorder","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product\/1769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/media\/1770"}],"wp:attachment":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/media?parent=1769"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_brand?post=1769"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_cat?post=1769"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_tag?post=1769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}