Amazon.com: Dayton Audio UM10-22 10" Ultimax High Displacement DVC Subwoofer 2 ohms Per Coil 3000 Watt Max Car Audio Subwoofer : Electronics
Amazon.com: Pair of Gravity 15 Inches Car Audio Subwoofer 3200 Watts Peak Power (1600x2) RMS Power 80 Watts Each with Dual Voice Configuration 4 Ohm Power (2 Woofers) : Electronics