Sunfire SDS10 10 Inch Dynamic Series Subwoofer - More bass from less space. When you want to experience more from your movies and music the SDS-10 steps up to deliver peak power output of 500W using a 10\" custom Sunfire driver that is mated to a 10\" down-firing radiator. Twice the woofers for twice the bass! The SDS-10 incorporates Sunfires wide-band energy efficient Class D amplifier and produces twice the output of its smaller sibling - while only consuming a half a watt in standby. Sunfires exclusive FFDTM technology results in superior fidelity higher output and with lower distortion than the competition.