Visonik V10D4 D4 Series High-Performance 10-Inch Vehicle Subwoofer High-performance vehicle subwoofer with 10-inch spruce pulp paper cone woofer Dual 2-inch, 4-ohm aluminum voice coils efficiently dissipate heat for higher power handling Stamped chrome steel basket aligns voice coils to produce bigger bass and better sound 48-ounce double-stacked strontium magnet; 83.8 dB sensitivity; mounting depth of 4.75 inches 250 watts RMS, 500 watts maximum power handling; 2-year warranty