Amazon.com: Dual Electronics SBX212i 12-inch illumiNITE High Performance Studio Enclosed Subwoofers with 1,200 Watts of Peak Power & 41-Ounce Magnets : Electronics
Dual XNBP12D Bandpass enclosure with two 12" woofers at Crutchfield
RX2 12" 200W Dual 4-Ohm Subwoofer - Phoenix Gold
Rockville RV208P Dual 8" 800w Car Audio Subwoofers in Vented Sub Enclosure Box - Rockville Audio
Dual Electronics DWS12 12-inch High Performance Subwoofer with a 2-inch Single Voice Coil and 1,000 Watts of Peak Power - Walmart.com
Monolith by Monoprice M-IWSUB82 Dual 8in In-Wall Subwoofer - Monoprice.com
TNE212DV Dual 12" TERMINATOR Series 1000-Watt Peak Power Subwoofer Enclosure | MTX Audio - Serious About Sound®