Discontinued Pioneer TS-W2502D4 10 Champion Series Pro
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
Pioneer TS-WX1220AH Dual 12" Ported Enclosure Active Subwoofer with Built-in Amplifier - Walmart.com
Pioneer TS-WX1220AH Aktiv subwoofer (3000 Watt) - Elkjøp