Polk Audio db1222 Ported enclosure with two 12" db Series subwoofers at Crutchfield
AudioPipe TXX-BDC4-12D 12 Inch 2,200 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black
5 Inch Car Audio Speaker I Key Buy 12v 220v Max 100watts Hifi Bluetooth Active Motor Auto Van Boom Box Loudspeakers Subwoofer - Subwoofers - AliExpress
Massive Audio HIPPOXL64 – 6 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6" Subwoofer 300 Watt RMS, 600w MAX Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually