"BPW-E12S - A subwoofer is a speaker in your system that handles low-frequency audio signals. Blaupunkt E-Series will improve your listening experience when playing your favourite song. || The Blaupunkt BPW-E12S is a 12-inch single voice coil (SVC) subwoofer, designed for deep bass reproduction in car audio systems. It features a durable injection-molded polypropylene (PP) cone and rubber surround, ensuring clear and powerful low-frequency performance. || Key Features || Power Handling : 500W Peak / 250W RMS || Impedance : 4 Ohms || Frequency Response : 25 Hz – 500 Hz || Cone Material : Injection-molded PP || Surround Material : Rubber || Magnet Material : Ferrite || Sensitivity : 86.4 dB SPL || Mounting Hole Diameter : 11.18 inches (284 mm) || Top Mount Depth : 0.79 inches (20 mm) || Bottom Mount Depth : 5.43 inches (138 mm) || Hole Cut-Out Diameter : 11.18 inches (284 mm) || Enclosure Recommendations || Vented Enclosure || Wall Thickness : 0.75 inches || Net Internal Volum e: 1.8 CuFt || External Dimensions : 14” W x 16” H x 19.5” D || Port Area : 12.5 Sq inches || Port Length : 10 inches || Sealed Enclosure: || Wall Thickness : 0.75 inches || Net Internal Volume : 1.0 CuFt || External Dimensions : 14.5” W x 14.5” H x 12.5” D || """