{"id":2157,"date":"2025-07-08T14:34:59","date_gmt":"2025-07-08T07:34:59","guid":{"rendered":"https:\/\/pltspeaker.com\/?post_type=product&#038;p=2157"},"modified":"2025-07-08T15:21:44","modified_gmt":"2025-07-08T08:21:44","slug":"4-sb12pacr25-4-coax","status":"publish","type":"product","link":"https:\/\/pltspeaker.com\/th\/product\/4-sb12pacr25-4-coax\/","title":{"rendered":"4&#8221; SB12PACR25-4 -COAX"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2159\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/DRAWING-4in-SB12PACR25-4-COAX-500x286-1-300x172.jpg\" alt=\"\" width=\"300\" height=\"172\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/DRAWING-4in-SB12PACR25-4-COAX-500x286-1-300x172.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/DRAWING-4in-SB12PACR25-4-COAX-500x286-1-18x10.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/DRAWING-4in-SB12PACR25-4-COAX-500x286-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2160\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/CURVE-4in-SB12PACR25-4-COAX-500x286-1-300x172.jpg\" alt=\"\" width=\"300\" height=\"172\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/CURVE-4in-SB12PACR25-4-COAX-500x286-1-300x172.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/CURVE-4in-SB12PACR25-4-COAX-500x286-1-18x10.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/CURVE-4in-SB12PACR25-4-COAX-500x286-1.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 aluminum cone<\/li>\n<li>Low damping rubber surround<\/li>\n<li>Large 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<li>Compact large surround dome tweeter<\/li>\n<\/ul>\n<h2 class=\"yikes-custom-woo-tab-title yikes-custom-woo-tab-title-specs\">Specs<\/h2>\n<p>SPECS WOOFER:<\/p>\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 45 cm<sup>2<\/sup><\/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 55 Hz<\/li>\n<li>Sensitivity (2.83V\/1m) 87.5 dB<\/li>\n<li>Mechanical Q-factor, Qms 4.84<\/li>\n<li>Electrical Q-factor, Qes 0.38<\/li>\n<li>Total Q-factor, Qts 0.35<\/li>\n<li>Moving mass incl. air,Mms 5.6 g<\/li>\n<li>Force factor, Bl 4.0 Tm<\/li>\n<li>Equivalent volume, Vas 4.3 liters<\/li>\n<li>Compliance, Cms 1.49 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>\n<p>SPECS TWEETER:<\/p>\n<ul>\n<li>Nominal Impedance 4 \u03a9<\/li>\n<li>DC resistance, Re 3.0 \u03a9<\/li>\n<li>Voice coil diameter 12.4 mm<\/li>\n<li>Voice coil height 1.2 mm<\/li>\n<li>Air gap height 1.5 mm<\/li>\n<li>Free air resonance, Fs 1300 Hz<\/li>\n<li>Sensitivity (2.83V\/1m) 87.5 dB<\/li>\n<li>Rated power handling* 10 W<\/li>\n<li>Magnetic flux density 0.97 T<\/li>\n<li>Magnet weight 0.003 kg<\/li>\n<li>Net weight 0.014 kg<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>.<\/p>","protected":false},"featured_media":2158,"template":"","meta":[],"product_brand":[47],"product_cat":[35],"product_tag":[],"class_list":{"0":"post-2157","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-sb-acoustics","7":"product_cat-coaxial","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\/2157","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\/2158"}],"wp:attachment":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/media?parent=2157"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_brand?post=2157"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_cat?post=2157"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_tag?post=2157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}