Amazon.com: Audiopipe TXX-BD2-12 12 Inch High Performance 1500 Watt Max Power Car Audio Subwoofers with Dual 4 Ohm Voice Coil (2 Pack) : Electronics
Earthquake 10" Subwoofer, 4 Ohm Dual V. C. , Push On Terminals : Automotive - Amazon.co.jp
Amazon.com: Pyle Car Subwoofer Audio Speaker - 8in Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 800 Watt Power and Foam Surround for Vehicle Stereo Sound System -
Amazon.com: Massive Audio TKO104 TKO Series. 10 Inch, 600 Watt, 8mm Top Plate, Dual 4 Ohm Car Subwoofer. Sold Individually. : Electronics
Amazon.com: NVX VCW124v3 (VCW124 Version 3) 2400 Watt Peak (1200W RMS) 12" VC-Series v3 Dual 4-Ohm Car Subwoofer… : Electronics
Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: 2 x 12 Subwoofer 1200W 2" 4 Ohm DVC Pro Car Audio American Bass XO-1244 : Electronics
Amazon.com: Lanzar 12in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, Dual 4 Ohm Impedance, 1600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System -
Skar Audio SDR-18 D4 18" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Automotive - Amazon.co.jp
Amazon.com: Harmony Audio HA-R104 Car Stereo Rhythm Series 10" Sub 500W Single 4 Ohm Subwoofer : Electronics