Polaris RZR PRO XP MTX 10 Inch Subwoofer | Side By Side Stuff
MTX RTP8A 8" 120w RMS Powered Subwoofer In Vented Sub Box Enclosure+Wire Kit - Walmart.com
Amazon.com: MTX TN8MS Terminator 8 Inch Micro Compact Amplified Subwoofer Enclosure for Small Vehicles with Class A/B Amplifier, Variable Bass Boost, External Bass Control, and Smart Engage Auto Turn On Circuitry :
MTX Thunder4500 T4508-04 8" 4-ohm subwoofer at Crutchfield