Carwales 8 Inch Car Ultra-thin 8" Subwoofer Amplifier Speaker High Power 300w Vehicle Under Seat Active Bass Audio With Treble - Subwoofers - AliExpress
SOUNDSTREAM PCO.10 10" 25cm 300W Car Audio Sub Subwoofer Quality Bass Speaker | eBay
8'' High End Midbass Speaker, 300W MAX, 4 Inch Coil (Each) – nepaudio
10" 300W Outdoor Subwoofer Forza-10 | Whole House Audio