{"id":2213,"date":"2025-07-08T15:42:10","date_gmt":"2025-07-08T08:42:10","guid":{"rendered":"https:\/\/pltspeaker.com\/?post_type=product&#038;p=2213"},"modified":"2025-07-08T15:42:10","modified_gmt":"2025-07-08T08:42:10","slug":"5x8-sb15sfcr39-4","status":"publish","type":"product","link":"https:\/\/pltspeaker.com\/th\/product\/5x8-sb15sfcr39-4\/","title":{"rendered":"5&#215;8&#8221; SB15SFCR39-4"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2215\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5X8in-SB15SFCR39-4-curve-500x355-1-300x213.jpg\" alt=\"\" width=\"300\" height=\"213\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5X8in-SB15SFCR39-4-curve-500x355-1-300x213.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5X8in-SB15SFCR39-4-curve-500x355-1-18x12.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5X8in-SB15SFCR39-4-curve-500x355-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2216\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5inx8in-SB15SFCR39-4-drawing-500x343-1-300x206.jpg\" alt=\"\" width=\"300\" height=\"206\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5inx8in-SB15SFCR39-4-drawing-500x343-1-300x206.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5inx8in-SB15SFCR39-4-drawing-500x343-1-18x12.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/5inx8in-SB15SFCR39-4-drawing-500x343-1.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>Racetrack design<\/li>\n<li>Hard paper cone (made in-house)<\/li>\n<li>Optimized motor system<\/li>\n<li>Non-conductive reinforced vented coil former<\/li>\n<li>Symmetric suspension<\/li>\n<li>Low damping rubber surround<\/li>\n<li>Long life silver lead wires<\/li>\n<li>Vented chassis<\/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 3.5 \u03a9<\/li>\n<li>Voice coil inductance, Le 0.91 mH<\/li>\n<li>Effective piston area, Sd 178 cm<sup>2<\/sup><\/li>\n<li>Voice coil diameter 38.5 mm<\/li>\n<li>Voice coil height 17 mm<\/li>\n<li>Air gap height 6 mm<\/li>\n<li>Linear coil travel (p-p) 11 mm<\/li>\n<li>Magnetic flux density 0.94 T<\/li>\n<li>Magnet weight 0.54 kg<\/li>\n<li>Net weight 1.65 kg<\/li>\n<li>Free air resonance, Fs 31 Hz<\/li>\n<li>Sensitivity (2.83V\/1m) 90 dB<\/li>\n<li>Mechanical Q-factor, Qms 6.57<\/li>\n<li>Electrical Q-factor, Qes 0.34<\/li>\n<li>Total Q-factor, Qts 0.32<\/li>\n<li>Moving mass incl. air,Mms 23.6 g<\/li>\n<li>Force factor, Bl 6.9 Tm<\/li>\n<li>Equivalent volume, Vas 49.9 liters<\/li>\n<li>Compliance, Cms 1.11 mm\/N<\/li>\n<li>Mechanical loss, Rms 0.7 kg\/s<\/li>\n<li>Rated power handling* 80 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":2214,"template":"","meta":[],"product_brand":[47],"product_cat":[63],"product_tag":[],"class_list":{"0":"post-2213","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-sb-acoustics","7":"product_cat-sfcr-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\/2213","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\/2214"}],"wp:attachment":[{"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/media?parent=2213"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_brand?post=2213"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_cat?post=2213"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pltspeaker.com\/th\/wp-json\/wp\/v2\/product_tag?post=2213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}