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        "rendered": "4\u2033 SB12PFCR25-4 \/ Paper"
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        "rendered": "<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2171\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PFCR25-4-DRAWING-500x246-1-300x148.jpg\" alt=\"\" width=\"300\" height=\"148\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PFCR25-4-DRAWING-500x246-1-300x148.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PFCR25-4-DRAWING-500x246-1-18x9.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4-SB12PFCR25-4-DRAWING-500x246-1.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2172\" src=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4in-SB12PFCR25-4-graphic-response-500x355-1-300x213.jpg\" alt=\"\" width=\"300\" height=\"213\" srcset=\"https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4in-SB12PFCR25-4-graphic-response-500x355-1-300x213.jpg 300w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4in-SB12PFCR25-4-graphic-response-500x355-1-18x12.jpg 18w, https:\/\/pltspeaker.com\/wp-content\/uploads\/2025\/07\/4in-SB12PFCR25-4-graphic-response-500x355-1.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>Proprietary cone material with natural fibers made in-house<\/li>\n<li>Butyl rubber surround for smooth frequency response<\/li>\n<li>Vented motor system for low compression<\/li>\n<li>Long stroke linear suspension for improved dynamics<\/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 0.26 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 14.8 mm<\/li>\n<li>Air gap height 5 mm<\/li>\n<li>Linear coil travel (p-p) 9.8 mm<\/li>\n<li>Magnetic flux density 0.84 T<\/li>\n<li>Magnet weight 0.32 kg<\/li>\n<li>Net weight 0.7 kg<\/li>\n<li>Free air resonance, Fs 58 Hz<\/li>\n<li>Sensitivity (2.83 V \/ 1 m) 87.5 dB<\/li>\n<li>Mechanical Q-factor, Qms 3.4<\/li>\n<li>Electrical Q-factor, Qes 0.49<\/li>\n<li>Total Q-factor, Qts 0.43<\/li>\n<li>Moving mass incl. air, Mms 5.3 g<\/li>\n<li>Force factor, Bl 3.5 Tm<\/li>\n<li>Equivalent volume, VAS 5.2 liters<\/li>\n<li>Compliance, Cms 1.42 mm\/N<\/li>\n<li>Mechanical loss, Rms 0.6 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>",
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