10D2 - Precision Power 10 Atom 1000W Dual 2-Ohm Subwoofer. ATOM subs use a composite sandwich cone with a polypropylene surface for durability and Spruce pulp backing for smooth low bass. Sparing no compromise, the ATOM series's motor assembly includes an extended tap top plate, which expands the magnetic field results in dynamic sounds & performance quality you demand and expect.