Amazon.com: Pyle 10 Inch Car Midbass Woofer - 600 Watt High Powered Car Audio Sound Component Speaker System w/High-Temperature Kapton Voice Coil, 50Hz-5kHz Frequency, 89.2 dB, 8 Ohm, 50oz Magnet PPA10 Black :
Monoprice 8 Inch 60-Watt Powered Subwoofer - Black - Walmart.com
ID1.112-SB | 12-in Single Full Range Subwoofer, 50Hz to 800Hz, 400W | McCauley Sound, Inc. | AV-iQ
KYYSLB SW-100 150W 4 Ohm 8~10 Inch Strong Bass Active 500 MV Subwoofer Amplifier Speaker Wooden 220 V Active Subwoofer Speaker _ - AliExpress Mobile
Legrand - OnQ 10 Inch Amplified Subwoofer, 5000 Series, Floor Standing Speaker with 50Hz to 200Hz, Volume Control, Power Switch, Choice of Line Inputs or Outputs, Black, 1 Count, HT5104 - - Amazon.com
Studiophile BX10s Subwoofer 240W 20Hz to 50Hz-200Hz/ (No Cables) (sold as is) | eBay