Sunfire SDS8 8 Inch Dynamic Series Subwoofer - High performance from the smallest possible form factor. The SDS-8 is the perfect choice for systems where small size and high output are equally important. Sunfires digital amplifier delivers 400W of peak output with unprecedented performance at this price. A front firing 8\" custom Sunfire driver is acoustically matched to an 8\" down-firing passive radiator creating nearly double the output compared to conventional single-driver designs. Small rooms big bass - no problem!