Amazon.com: DS18 SLC10S Car Subwoofer Audio Speaker - 10" in. Paper Glass Fiber Cone, Black Steel Basket, Single Voice Coil 4 Ohm Impedance, 440W MAX Power and Foam Surround for Vehicle Stereo
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 6 Inch Competition Grade Pressed Paper Cone, 4 Ohm Impedance, Advanced Air Flow, 400W Power for Stereo Sound System - Audiotek K706 (1 Subwoofer) PK1 : Electronics
Amazon.com: Lanzar 6.5” Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Aluminum Voice Coil, 4 Ohm Impedance, 600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System - MAXP64 : Electronics
Amazon.com: 2X Soundxtreme ST-1252 12 Inch 2600 Watts Max Power for Pair Car Audio Subwoofer Dual 4 Ohm Voice Coil Configuration Competition 12" Subs Elite Stereo Speaker System : Electronics
Amazon.com: AudioPipe TXX-BDC4-12D 12 Inch 2,200 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: AudioPipe TXX-BDC4-15D 15 Inch 2,800 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: JBL Stage 810 800W Max 8" Stage Series Single 4 ohm Car Audio Subwoofer Speaker Bundled with Alphasonik Earbuds : Electronics
Amazon.com: 10" Subwoofer 4000W 4 Ohm DVC Pro Car Audio Bass Massive HIPPOXL104 : Electronics
Amazon.com: Audiopipe APSB-1299PP Dual 12 Inch Car Audio Subwoofer Speakers and Sealed Enclosure, 2 Channel 500 Watt Amplifier, and Wire Installation Kit : Electronics
Amazon.com: 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2 Inch
Amazon.com: Pair of Gravity G5 12 Inch 6000 Watt Package Car Audio Subwoofer w/ 4 Ohm DVC Power (2 Woofers) : Electronics
Amazon.com: AudioPipe TXX-BDC4-10 10 Inch 1800 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Sub Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 6.5 Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 600 Watt Power, Foam Surround for Vehicle Stereo Sound System - Pyle PLPW6D : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 10 Inch Blue Injection Molded Cone, Blue Chrome-Plated Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 1000W Power For Vehicle Stereo Sound System - Pyle
Amazon.com: 8-Inch Carpeted Subwoofer Tube Speaker - 400 Watt High Powered Car Audio Sound Component Speaker Enclosure System w/ 2” Aluminum Voice Coil, 4 Ohm, 30Hz-700kHz Frequency - Pyle PLTB8 : Electronics
Amazon.com: AudioPipe TXX-BDC2-12 12 Inch 1500 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: Pyle Car Mid Bass Speaker System - Pro 5 Inch 200 Watt 4 Ohm Auto Mid-Bass Component Poly Woofer Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2.2”
Amazon.com: Bandpass Enclosure Car Subwoofer Speaker - 500 Watt High Power Car Audio Sound Component Speaker System w/ 10-inch Subwoofer, 2" Aluminum Voice Coil, 4 Ohm, Ported Enclosure System - Pyle PLQB10 : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 15 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 3500W Power for Stereo Sound System - Gravity Warzone GW15D2 (1 Subwoofer) : Electronics