Sony XSL12S Slim Line Subwoofer (Discontinued by Manufacturer) 12 Polypropylene Cone - five-sided cone with rubber surround - An extremely strong cone material that can take a serious beating 90-380 watts RMS 1500W Peak Power 4-Ohm Voice Coil - A virtual guarantee of compatibility between your amps, speakers, and subwoofers Gold-plated 5-way Binding Posts - A solid, secure, simple and capable way of transferring serious current to speakers