Amazon.com: Massive Audio GTX64 – 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 250 Watt RMS, 500w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Massive Audio SUMMOXL154-15 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 15" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
GX 12" High Performance Dual 2-Ohm Subwoofer - Phoenix Gold
Blastking KXL218AS 2x18 inch 3800 Watts Powered Hi-Performance Subwoof
The Best High-Performance Subwoofer | Reviews by Wirecutter
BOA121-N 12 inch Car Subwoofer | RMS Dual 1 Ohm Mega Neodymium Subwoofer
Amazon.com: Massive Audio HIPPOXL122R – 12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 3000 Watt RMS, 6000w MAX Dual 2 Ohm, 4 Inch Voice Coil. Sold Individually : Electronics
Kenwood KFC-XW1221HP High Performance 12" 2-Ohm Subwoofer and X502-1 Class D Mono Power Amplifier - Creative Audio
Amazon.com: Cadence 8 Inch Car Subwoofer, High Performance 800 Watts Dual 2 Ohm 2 Inch Black Aluminium 4 Layer Voice Coil, Ultra Shock Series Car Audio Woofer US8D2, Single : Electronics
Triple Under The Seat Performance Subwoofer Enclosure
V154DV2 - 15 Inch Dual 4-ohm High-Performance 550W RMS / 1500W MAX Power Handling Subwoofer - Cerwin Vega