Amazon.com: Pyle PLPW6D 6" Dual Voice Coil 4-Ohm Black Car Stereo Audio Subwoofers (2 Pack) : Electronics
Amazon.com: ASHATA 600 Watt Car Subwoofer, 6 Inch Car Speakers, 4 Ohms Car Subwoofer Loudspeaker Midrange Coaxial Speakers Black for Car Audio Systems : Electronics
Amazon.com: Pyle 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 -PLPW6D : Electronics
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64,Yellow : Electronics
Amazon.com: 5 CORE 3 x 3 inch Car Subwoofer 5 Pieces 30 Watt Peak Power 4 Ohm Replacement Speakers Audio Speaker Stereo Woofer : 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: ASHATA 600 Watt Car Subwoofer, 6 Inch Car Speakers, 4 Ohms Car Subwoofer Loudspeaker Midrange Coaxial Speakers Black for Car Audio Systems : Electronics
Amazon.com: Tang Band W6-1139SIF 6-1/2" Paper Cone Subwoofer Speaker : Electronics
Amazon.com: Massive Audio GTX64 – 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 250 Watt RMS, 500w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Ground Zero Iridium 16,5 cm / 6.5" Subwoofer - 4 Ohm - 100 WRMS, Black : Electronics
Amazon.com: Goldwood Sound, Inc. Stage Subwoofer, Black, OEM 6.5" Woofers 180 Watts each 8ohm Replacement Speakers (GW-206/8-2) : Musical Instruments
Amazon.com: Goldwood Sound, Inc. Stage Subwoofer, Dual Voice Coil 10" Woofers 220 Watt Each 6ohm 2 Speaker Set (GW-410D-2) : Musical Instruments