Amazon.com: Gladen Sqx 15 38 cm Subwoofer : Electronics
Amazon.com: 5 CORE 8 Inch Car Subwoofer Paper Cone, Black, Voice Coil 4 Ohm Impedance, 1000 Watt Power Audio Speakers, Vehicle Audio Full Range Drivers, Loudspeaker Woofer Replacement : Electronics
Ground Zero GZPW 15XXMAX 38 cm / 15″ high power long stroke subwoofer