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
Amazon.com: (2) Rockville SBG1188 18" 2000W Pro DJ Subwoofers+RPA12 5000w Amplifier+Cables : Musical Instruments
JBL W15GTi MKII 15" 800W RMS 5000W max subwoofer Photo #2024426 - US Audio Mart
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Best Buy: JBL 15" Dual-Voice-Coil 12-Ohm Subwoofer W15GTI_MKII
High Quality 15 Inch 5000W 8 Ohm Bass Full Range Speaker 220mm Magnetic 100mm Core For 5.1 Home Theater Music Stereo Subwoofer - AliExpress