Amazon.com: 5 CORE 15 Inch Subwoofer Speaker 3500W Peak High Power Handling 350W RMS 15" Replacement 8 Ohm Pro Audio DJ Sub Woofer w CCAW Voice Coil Steel Frame 90oz Magnet 15-185
Electro-Voice EVC-1181S-B 18-inch 350W Subwoofer - Black | Sweetwater
Powerbass XL-1044 10 in. Single 4 Ohm Subwoofer 350W RMS & 700W Maximum - Walmart.com