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
KICKER CompC Loaded Enclosures Single-Voice-Coil 4-Ohm Subwoofer Black Carpet 44TCWC104 - Best Buy