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 AUDIO MTX AUDIO RT8PT 8 in. 240-Watt Car Loaded Subwoofer Enclosure Amplified Tube Box Vented RT8PT - The Home Depot