Amazon.com: CERWIN Vega 600W Active Spare Tire Application Subwoofers Series (VPSTX12) : Electronics
JBL BassPro Hub | 11" (279mm) Spare tire subwoofer with built-in 200W RMS amplifier with remote control.
Amazon.com: American Sound Connection Universal Fit Single 10" Subwoofer Sealed Replacement Spare Tire Custom Sub Box : Electronics
Mega Audio Spare Tyre Active Subwoofer MABT2121 - Mega Audio
Spare Wheel Active Subwoofer - Emphaser
Spare Tire Subwoofer Install (Non-Bose) | 2004 to 2020 Mazda 3 Forum and Mazdaspeed 3 Forums
Car Digital Dsp Amplifier And Car Active Spare Tire Subwoofer Digital Signal Processing 31 Bands Equalizer Precision Tuning - Amplifiers - AliExpress
For those of you who want more bass but don't want to sacrifice your spare tire or hatch space, I highly recommend this spare tire mount subwoofer : r/GolfGTI
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
JBL Basspro Hub - 11" Spare Tire Powered Subwoofer System with 200W Amplifier, Black - Creative Audio
Sennuopu Active Subwoofer Built-in Power Amplifier Speakers High Resolution Audio System Car Sub Woofer Install On Spare Tire - Subwoofers - AliExpress