Soundstream R3.10 10 Inch Reference R3 Series Dual 2 Ohm Subwoofers – Caraudio Closeout
Soundstream PSW.124 12" Single 4 ohm Voice Coil Shallow Mount Car Subw – DiscountCentralOnline
Amazon.com: Soundstream USB-10P 10 Inch Underseat Enclosed Car Vehicle Subwoofer with Built In 150 Watt RMS Amplifier and Bass Knob Remote Control, Black : Electronics