Features Paper Cone Diaphragm with Polypropylene Cap Progressive Height Rate Double Spider Long Excursion Structure Rubber Surround Paper Cone Diaphragm with Polypropylene Cap A lightweight paper cone diaphragm directly connected to the voice coil reproduces tight low end. The injected polypropylene dust cap ensures rigidity and optimizes internal damping realizing powerful and responsive bass sound. Progressive Height Rate Double Spider The acoustically-optimized spider allows for higher power handling and airflow with a profile designed for more rapid and precise cushioning of the speaker cone. To increase signal integrity and prevent sound interference the lead wire from the voice coil is also sewn to the spider reducing wire movement. Long Excursion Structure The voice coil is supported by the double-layered spider suppressing unwanted rolling while also ensuring long excursion to reproduce rich bass sounds. Rubber Surround Rubber surround reduces excessive vibration and supports cone excursion with less distortion. Result is solid bass response at high volume levels so that your system can play loud and clear. Environment In Mind Sony products are not only designed to be stylish but also with the environment in mind. For the individual packaging of the XS-W104GS 98% of the cushions are made of paper materials and compared to the prior model printed information has been carefully considered for simplicity and length to reduce printer ink usage by approximately 90% reflecting Sonys commitment to reducing environmental impact. What's in the Box XS-W104GS 10" Subwoofer Detachable Gasket Warranty Card Specifications Speaker SystemConfiguration: Single Voice Coil Size: 10" (25 cm) General FeaturesPeak Power: 1500 W RMS Power: 350 W Rated Power: 300 W Effective Frequency Range: 27-500 Hz Output Sound Pressure: 83 dB 2dB SPL (1W1m) Impedance (ohms): 4 Diaphragm Material: Paper Cone with PP Cap Magne