FF12 Front Firing Subwoofer (Open-Box) - Earthquake Sound Shop
Refurbished Sundown Zv5 Subwoofer – DirecTroniX
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 :