Amazon.com: Gravity Warzone WZ10US 10" Pro Audio Active Compact Spare Tire Slim Aluminum 1000 Watts 2 Ohm Subwoofer Powerful Loud Speaker with Bass Volume Control Knob : Electronics
Nissan 370z Spare Tire Well Speaker Box Sub Subwoofer Enclosure – AK Audio
Sennuopu Car Subwoofer Class AB Power Amplifier Bass Speakers Aluminum Box Active Sub Woofer Install on Spare Tire Audio System - AliExpress
Amazon.com: Cerwin Vega 12 Inch 150W RMS 2 Ohm Active Subwoofer for Car Audio - Compact Spare Tire Sub with Bass Knob, PWM MOSFET Power, Thermal Protection - Ideal for 12" Subwoofers