Amazon.com: DS18 EXL-XX12.4DHE 12” High Excursion Car Audio Subwoofer 4000 Watts Dual Voice Coil 4 Ohms (1 Speaker) High Performance Big Bass Applications High Power : Everything Else
2x Infinity 2400W 12" Inch Subwoofer + Audiobank 5000W CLASS D Amplifier + Kit | eBay
High Quality 15 Inch 5000W 8 Ohm Bass Full Range Speaker 220mm Magnetic 100mm Core For 5.1 Home Theater Music Stereo Subwoofer - AliExpress
Stage3627FAM JBL Stage3 627F 6.5" 2-Way 225 Watt Peak Power Coaxial Car Audio Speakers for Factory Upgrade (Pair, Without Grilles)