{"id":2153,"date":"2025-07-08T11:49:21","date_gmt":"2025-07-08T04:49:21","guid":{"rendered":"https:\/\/pltspeaker.com\/?post_type=product&#038;p=2153"},"modified":"2025-07-08T14:39:19","modified_gmt":"2025-07-08T07:39:19","slug":"4-sb12pac25-4-aluminium","status":"publish","type":"product","link":"https:\/\/pltspeaker.com\/th\/product\/4-sb12pac25-4-aluminium\/","title":{"rendered":"4&#8221; SB12PAC25-4 \/ Aluminium"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2155\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-DRAWING-500x246-1-300x148.jpg\" alt=\"\" width=\"300\" height=\"148\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-DRAWING-500x246-1-300x148.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-DRAWING-500x246-1-18x9.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-DRAWING-500x246-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2156\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-GRAFIK-500x246-1-300x148.jpg\" alt=\"\" width=\"300\" height=\"148\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-GRAFIK-500x246-1-300x148.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-GRAFIK-500x246-1-18x9.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PAC25-4-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>Vented reinforced plastic chassis<\/li>\n<li>Anodised aluminium cone<\/li>\n<li>Low damping rubber surround<\/li>\n<li>Large vented motor system<\/li>\n<li>Long stroke linear suspension<\/li>\n<li>Light weight CCAW voice coil<\/li>\n<li>Non-conducting fibreglass coil former<\/li>\n<li>Non-resonant long life lead wires<\/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 4 \u03a9<\/li>\n<li>DC resistance, Re 3.1 \u03a9<\/li>\n<li>Voice coil inductance, Le 0.25 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 1.03 T<\/li>\n<li>Magnet weight 0.40 kg<\/li>\n<li>Net weight 0.86 kg<\/li>\n<li>Free air resonance, Fs 52.5 Hz<\/li>\n<li>Sensitivity (2.83 V \/ 1 m) 87 dB<\/li>\n<li>Mechanical Q-factor, Qms 5.0<\/li>\n<li>Electrical Q-factor, Qes 0.33<\/li>\n<li>Total Q-factor, Qts 0.31<\/li>\n<li>Moving mass incl. air, Mms 6.1 g<\/li>\n<li>Force factor, Bl 4.35 Tm<\/li>\n<li>Equivalent volume, VAS 5.3 liters<\/li>\n<li>Compliance, Cms 1.50 mm\/N<\/li>\n<li>Mechanical loss, Rms 0.4 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>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>.<\/p>","protected":false},"featured_media":2154,"template":"","meta":[],"product_brand":[47],"product_cat":[61],"product_tag":[],"class_list":{"0":"post-2153","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-sb-acoustics","7":"product_cat-pac-midwoofers","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product\/2153","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\/2154"}],"wp:attachment":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/media?parent=2153"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_brand?post=2153"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_cat?post=2153"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_tag?post=2153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}