Amazon.com: PyleUsa Car Midbass Speaker System - Pro 8 Inch 400 Watt 4 Ohm Auto Mid-Bass Component Poly Woofer Audio Sound Speakers for Car Stereo w/ 40 Oz Magnet, 50Hz-5KHz Frequency, 3.58”
Amazon.com: Focal Pair SUB P25 10" 200W RMS 400W Max Single 4-Ohm Subwoofer : Electronics
Amazon.com: Black Diamond DIA-8D4 Car Subwoofer 8" 400W Max Power, 200W RMS, Dual 4 Ohms, DVC (1 Speaker) : Electronics
Amazon.com: Polk Audio HTS 12 Powered Subwoofer with Power Port Technology | 12” Woofer, up to 400W Amp | For the Ultimate Home Theater Experience | Modern Sub that Fits in any
Amazon.com: Klipsch R-12SW Powerful Deep Bass Front Firing 12" Copper-Spun Driver 400W Digital Power Subwoofer 14" X 18.5" X 16" : Electronics
Amazon.com: pkg SOLID1 - Focal Monoblock 470 W RMS Power Amplifier + Pair of SUB P25 - Focal 10" 200W RMS 400W Max Single 4-Ohm Subwoofer : Electronics
Amazon.com: Blaupunkt 8-Inch Single Voice Coil Subwoofer with 400W Power : Electronics
Amazon.com: NOVIK NEO WPW 15400 15" WOOFER Low Sound, RMS Power 400W, 8 Ohm, Professional subwoofers and deep bass and mid-bass : Musical Instruments
Amazon.com: SOUND TOWN 18" RAW WOOFER SPEAKER, 400 WATTS PRO AUDIO PA DJ REPLACEMENT SUBWOOFER LOW FREQUENCY DRIVER (STLF-1890) : Musical Instruments
Amazon.com: Hifonics BXS10D4 Brutus Shallow Mount Subwoofer (Black) – 10 Inch Subwoofer, 400 Watt, Car Audio System, 2.5 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures, Marine Grade : Electronics
Amazon.com: MTX Magnum MB210SP 10-Inch 400W RMS Dual Subwoofer System, Soundstorm AKS8 8 Gauge Complete Wiring Kit, and Boss Audio CPBK2 2 Farad Power Capacitor : Electronics
Amazon.com: Skar Audio EVL-1X65D4-V-LP 6.5" 400 Watt Low Profile Slot Port Loaded Car Subwoofer Enclosure : Electronics