General Features: RMS 300 watts Dual 2 or 4 ohm voice coils Black Aluminum 2.25” voice coil former for superior heat dissipation High temperature 4-layer copper voice coil wire Stitched-on “Mini-XL” tinsel Leads to prevent fatigue and failure Vented pole-piece and vented magnetic ...General Features: RMS 300 watts Dual 2 or 4 ohm voice coils Black Aluminum 2.25” voice coil former for superior heat dissipation High temperature 4-layer copper voice coil wire Stitched-on “Mini-XL” tinsel Leads to prevent fatigue and failure Vented pole-piece and vented magnetic gap Dual-magnet design for smooth acoustic response Custom tooled cone shape for reduced mechanical noise over high excursion Bolt-through motor design to ensure maximum longevity and ruggedness The SML series is a revolutionary line of subwoofers offered by Sundown Audio. Designed to fit under or behind your seat, the SML series performs exceptionally well in small enclosures.