SL610-D2 - DD Audio Digital Designs 10" Dual 2-Ohm 1200W Subwoofer. The SL600 Series subwoofers that give you the bass you want, in almost any space you want to put it. To maintain power handling, cooling and excursion the SL600s utilize full size sub features such as 2.5 ” high temperature voice coil, 72oz magnet, back plate coil gap venting, and an EROM surround.