Sony XSW104ES Mobile ES Series 10" 4ohm component ...
Product highlights: 10" 4ohm component subwoofer. mica flake/aramid fiber/pulp cone with honeycomb core. separatednotch rubber surround. goldplated spring terminals allow up to 10gauge wiring. power handling: 500 watts RMS (1800 watts peak) frequency range: 28500 Hz.